Article
Astronomy & Astrophysics
Michael W. Topping, Daniel P. Stark, Ryan Endsley, Rychard J. Bouwens, Sander Schouws, Renske Smit, Mauro Stefanon, Hanae Inami, Rebecca A. A. Bowler, Pascal Oesch, Valentino Gonzalez, Pratika Dayal, Elisabete da Cunha, Hiddo Algera, Paul van Der Werf, Andrea Pallottini, Laia Barrufet, Raffaella Schneider, Ilse De Looze, Laura Sommovigo, Lily Whitler, Luca Graziani, Yoshinobu Fudamoto, Andrea Ferrara
Summary: This study presents specific star formation rates (sSFRs) for 40 UV-bright galaxies at high redshifts, using improved SFR calibrations and SED-based stellar masses. The results show that the sSFRs derived from far-infrared continuum emission are higher than those derived from UV+optical SEDs. The study also suggests the possibility of spatial variations in dust across these galaxies and finds that sSFRs increase rapidly with redshifts, consistent with expectations from baryon accretion rates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Rongmon Bordoloi, John M. O'Meara, Keren Sharon, Jane R. Rigby, Jeff Cooke, Ahmed Shaban, Mateusz Matuszewski, Luca Rizzi, Greg Doppmann, D. Christopher Martin, Anna M. Moore, Patrick Morrissey, James D. Neill
Summary: We report a new method to observe foreground damped Lyman alpha systems through integral-field spectroscopy. These systems have a wide extent and exhibit large variations in neutral hydrogen density, indicating the presence of the necessary fuel for the next generation of star formation.
Article
Astronomy & Astrophysics
Xuejian Shen, Mark Vogelsberger, Dylan Nelson, Sandro Tacchella, Lars Hernquist, Volker Springel, Federico Marinacci, Paul Torrey
Summary: Using SKIRT radiative transfer calculations, we post-process galaxies in the IllustrisTNG simulations to make predictions for the NIR and FIR properties of galaxies at z >= 4. While there are some underestimations in certain cases, the overall agreement with observations is good. We also provide predictions for the galaxy luminosity functions and number counts observed by JWST MIRI. However, TNG combined with our dust modeling choices significantly underpredicts the abundance of dust-obscured FIR galaxies and the SFRD contributed by optical/NIR dark objects. These discrepancies could provide new constraints on feedback models and dust contents in simulations. Additionally, our simulations overestimate the peak dust temperature of high-redshift galaxies by about 20 K, possibly due to the limited mass resolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
L. Pantoni, M. Massardi, A. Lapi, D. Donevski, Q. D'Amato, M. Giulietti, F. Pozzi, M. Talia, C. Vignali, A. Cimatti, L. Silva, A. Bressan, T. Ronconi
Summary: This study presents the ALMA view of 11 main-sequence dusty star-forming galaxies at the peak of cosmic star formation history, combining galaxy spectral energy distribution analysis with ALMA continuum and CO spectral emission. Results show that these DSFGs are compact in the (sub-)millimetre range, while the optical emission extends to larger radii. The presence of rotating molecular gas discs suggests ongoing star formation processes and potential AGN feedback in some galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Hiddo S. B. Algera, Hanae Inami, Pascal A. Oesch, Laura Sommovigo, Rychard J. Bouwens, Michael W. Topping, Sander Schouws, Mauro Stefanon, Daniel P. Stark, Manuel Aravena, Laia Barrufet, Elisabete da Cunha, Pratika Dayal, Ryan Endsley, Andrea Ferrara, Yoshinobu Fudamoto, Valentino Gonzalez, Luca Graziani, Jacqueline A. Hodge, Alexander P. S. Hygate, Ilse de Looze, Themiya Nanayakkara, Raffaella Schneider, Paul P. van der Werf
Summary: This study uses ALMA observations to investigate the dust content of high-redshift galaxies. The results show that dust-obscured star formation contributes approximately 30% in the interstellar medium of high-redshift galaxies, indicating its continued importance even in the epoch of reionization.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Hakim Atek, Lukas J. Furtak, Pascal Oesch, Pieter van Dokkum, Naveen Reddy, Thierry Contini, Garth Illingworth, Stephen Wilkins
Summary: We investigate the burstiness of star formation and the ionizing efficiency of a large sample of galaxies at 0.7 < z < 1.5 using HST grism spectroscopy and deep ultraviolet (UV) imaging. Our findings suggest that the burstiness parameters of these strong emission-line galaxies may differ from previous observations and simulations. We also observe an increase of ionizing photon production efficiency with redshift, further confirming similar results at higher redshifts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. Pallottini, A. Ferrara
Summary: This study quantifies and analyzes the star formation rate in high-redshift galaxies, finding that it exhibits stochastic variability. This variability is related to stellar mass but cannot explain the over-abundance seen in high-redshift systems. Other physical processes, such as radiation-driven outflows, need to be invoked to explain the enhanced luminosity of super-early systems.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
L. Pantoni, A. Lapi, M. Massardi, D. Donevski, A. Bressan, L. Silva, F. Pozzi, C. Vignali, M. Talia, A. Cimatti, T. Ronconi, L. Danese
Summary: This study examines 11 (sub-)millimeter-selected DSFGs in the GOODS-S field with confirmed redshifts, aiming to understand their astrophysical properties and their role in galaxy evolution. The results indicate that these galaxies have stellar mass, star formation rate, and dust content consistent with the galaxy main sequence at a redshift of about 2, with high interstellar dust content and rapid enrichment of the interstellar medium. The study also reveals total and molecular gas content in the galaxies, showing a typical depletion timescale and potential presence of accreting SMBHs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Fred Angelo Batan Garcia, Massimo Ricotti, Kazuyuki Sugimura, Jongwon Park
Summary: Using radiation-hydrodynamic cosmological simulations, the study presents a detailed description of a typical-mass dwarf galaxy before the epoch of reionization, revealing the formation and evolution of star clusters into individual star particles. The galaxy has an irregular morphology dominated by light emitted from numerous, compact, and gravitationally-bound star clusters. The study also discusses the star-forming gas clouds in the galaxy and their potential to produce globular cluster progenitors.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Y. Khusanova, M. Bethermin, O. Le Fevre, P. Capak, A. L. Faisst, D. Schaerer, J. D. Silverman, P. Cassata, L. Yan, M. Ginolfi, Y. Fudamoto, F. Loiacono, R. Amorin, S. Bardelli, M. Boquien, A. Cimatti, M. Dessauges-Zavadsky, C. Gruppioni, N. P. Hathi, G. C. Jones, A. M. Koekemoer, G. Lagache, R. Maiolino, B. C. Lemaux, P. Oesch, F. Pozzi, D. A. Riechers, M. Romano, M. Talia, S. Toft, D. Vergani, G. Zamorani, E. Zucca
Summary: Measurements of star formation rate (SFR) at high redshifts have relied on far-ultraviolet observations, with uncertainties in dust attenuation corrections leading to debates. This study used far-infrared observations to directly constrain the obscured SFR in galaxies at redshifts 4.4<5.9, finding that the main sequence and specific SFR do not significantly evolve between redshifts around 4.5 and 5.5. The obscured fraction of SFR density decreases with increasing redshift, but still accounts for around 61% of the total SFRD at redshift around 5.5.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Tanio Diaz-Santos, Roberto J. Assef, Peter R. M. Eisenhardt, Hyunsung D. Jun, Gareth C. Jones, Andrew W. Blain, Daniel Stern, Manuel Aravena, Chao-Wei Tsai, Sean E. Lake, Jingwen Wu, Jorge Gonzalez-Lopez
Summary: EL Hot DOGs exhibit very high [C II] surface densities and diverse [C II] velocity fields, with similar sizes and line-to-continuum ratios, but with substantial uncertainties. This suggests that the eruptive phase of EL Hot DOGs may be recurrent.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Mengtao Tang, Daniel P. Stark, Richard S. Ellis
Summary: As the James Webb Space Telescope approaches scientific operation, there is much interest in exploring the redshift range beyond that accessible with Hubble Space Telescope imaging. Currently, the only means to gauge the presence of such early galaxies is to age-date the stellar population of systems in the reionisation era. However, a spectroscopic study reveals that the previously believed genuinely young systems may have higher dynamical masses than expected.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Benjamin Magnelli, Carlos Gomez-Guijarro, David Elbaz, Emanuele Daddi, Casey Papovich, Lu Shen, Pablo Arrabal Haro, Micaela B. Bagley, Eric F. Bell, Veronique Buat, Luca Costantin, Mark Dickinson, Steven L. Finkelstein, Jonathan P. Gardner, Eric F. Jimenez-Andrade, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Yipeng Lyu, Pablo G. Perez-Gonzalez, Nor Pirzkal, Sandro Tacchella, Alexander de la Vega, Stijn Wuyts, Guang Yang, L. Y. Aaron Yung, Jorge Zavala
Summary: This study examines the morphologies of star-forming galaxies at 0.1 < z < 2.5 in both rest-optical and rest-mid-infrared wavelengths. By combining Hubble Space Telescope and JWST images, the authors measured the distributions of stellar and dust-obscured star formation in 69 galaxies. The results show a correlation between the sizes and Sersic indices of these galaxies in both optical and infrared bands.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Jose A. Flores Velazquez, Alexander B. Gurvich, Claude-Andre Faucher-Giguere, James S. Bullock, Tjitske K. Starkenburg, Jorge Moreno, Alexandres Lazar, Francisco J. Mercado, Jonathan Stern, Martin Sparre, Christopher C. Hayward, Andrew Wetzel, Kareem El-Badry
Summary: Understanding the rate at which stars form is essential for studying galaxy formation. Observations and simulations have shown that the star formation rates (SFRs) of galaxies vary significantly over time, affecting the sensitivity of H alpha and far-ultraviolet (FUV) continuum SFR indicators. The best-fitting time scales for H alpha and FUV to measure SFR in galaxies differ, and the ratio of SFRs inferred using H alpha versus FUV can be used to probe the burstiness of star formation in galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Tommaso Zana, Simona Gallerani, Stefano Carniani, Fabio Vito, Andrea Ferrara, Alessandro Lupi, Fabio Di Mascia, Paramita Barai
Summary: Quasar feedback slightly increases the effective quasar bias, boosting the number density of observable quasar companions. Deeper observations with JWST and/or ALMA will improve the statistical significance of this result.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan, Abraham Loeb
Summary: The researchers discussed the potential origin of double-peaked profiles observed in Lyman-alpha emitters during the epoch of reionization, suggesting they may come from obscured AGN. By comparing the luminosities of AGN with similar quasar samples at these epochs, they estimated the extent of AGN obscuration. Future X-ray, radio, and James Webb Space Telescope observations will be important for testing the contribution of AGN to intergalactic-scale ionization zones of high-redshift LAEs.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan, Abraham Loeb
Summary: The contribution of tidal disruption events (TDEs) to the flares in Active Galactic Nuclei (AGN) at high redshifts was explored. It was found that at low redshifts, a few percent of AGN with bolometric luminosities less than or similar to 10(44) erg s(-1) may be attributable to TDEs, with this fraction significantly increasing at earlier cosmic times, including up to several tens of percent of AGN at z greater than or similar to 3. Further calibrations with upcoming X-ray missions and spectroscopic surveys targeting TDE-AGN are motivated by these findings.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Obinna Umeh, Roy Maartens, Hamsa Padmanabhan, Stefano Camera
Summary: This passage discusses post-reionisation 21cm intensity mapping experiments targeting the spectral line of neutral hydrogen in dark matter haloes, and explores the impact of halo physical size on the statistical properties of HI power spectra. It also highlights how finite halo size results in a cancellation of certain noise features and leads to sub-Poissonian noise signatures on large scales.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan, Abraham Loeb
Summary: This study illustrates the observability of the end stages of the earliest (Population III) stars at high redshifts z greater than or similar to 10, using the recently observed transient, GN-z11-flash as an example. The observed spectrum of this transient suggests that it may originate from a shock-breakout in a Population III supernova in the GN-z11 galaxy at z similar to 11. The study also provides a forecast of the expected number of such transients from z > 10 galaxies in the future.
GENERAL RELATIVITY AND GRAVITATION
(2022)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan, Abraham Loeb
Summary: We present a novel signature of black hole binaries by analyzing the kinematics of water maser emission in their environments. Our results show that binary black holes exhibit distinct kinematic and spectral differences compared to single black holes, with the blueshifted masers following Keplerian rotation curve and the redshifted masers deviating from this relation. The double peaked structure in the spectrum of masers suggests the potential for identifying binary black hole candidates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
James W. Lamb, Kieran A. Cleary, David P. Woody, Morgan Catha, Dongwoo T. Chung, Joshua Ott Gundersen, Stuart E. Harper, Andrew I. Harris, Richard Hobbs, Havard T. Ihle, Jonathon Kocz, Timothy J. Pearson, Liju Philip, Travis W. Powell, Lilian Basoalto, J. Richard Bond, Jowita Borowska, Patrick C. Breysse, Sarah E. Church, Clive Dickinson, Delaney A. Dunne, Hans Kristian Eriksen, Marie Kristine Foss, Todd Gaier, Junhan Kim, Charles R. Lawrence, Jonas G. S. Lunde, Hamsa Padmanabhan, Maren Rasmussen, Anthony C. S. Readhead, Rodrigo Reeves, Thomas J. Rennie, Nils-Ole Stutzer, Marco P. Viero, Duncan J. Watts, Ingunn Kathrine Wehus
Summary: Line intensity mapping is a new technique for tracing the global properties of galaxies, and the CO Mapping Project Pathfinder is an instrument designed to detect redshifted carbon monoxide with high precision and frequency range.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Kieran A. Cleary, Jowita Borowska, Patrick C. Breysse, Morgan Catha, Dongwoo T. Chung, Sarah E. Church, Clive Dickinson, Hans Kristian Eriksen, Marie Kristine Foss, Joshua Ott Gundersen, Stuart E. Harper, Andrew Harris, Richard Hobbs, Havard T. Ihle, Junhan Kim, Jonathon Kocz, James W. Lamb, Jonas G. S. Lunde, Hamsa Padmanabhan, Timothy J. Pearson, Liju Philip, Travis W. Powell, Maren Rasmussen, Anthony C. S. Readhead, Thomas J. Rennie, Marta B. Silva, Nils-Ole Stutzer, Bade D. Uzgil, Duncan J. Watts, Ingunn Kathrine Wehus, David P. Woody, Lilian Basoalto, J. Richard Bond, Delaney A. Dunne, Todd Gaier, Brandon Hensley, Laura C. Keating, Charles R. Lawrence, Norman Murray, Roberta Paladini, Rodrigo Reeves, Marco P. Viero, Risa H. Wechsler
Summary: The CO Mapping Array Project aims to trace the distribution and properties of galaxies using line intensity mapping of carbon monoxide (CO). Through observations using the Pathfinder instrument, which is sensitive to CO emissions, the researchers have obtained direct constraints on the clustering component of the CO power spectrum. These constraints significantly improve upon previous measurements.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Havard T. Ihle, Jowita Borowska, Kieran A. Cleary, Hans Kristian Eriksen, Marie K. Foss, Stuart E. Harper, Junhan Kim, Jonas G. S. Lunde, Liju Philip, Maren Rasmussen, Nils-Ole Stutzer, Bade D. Uzgil, Duncan J. Watts, Ingunn Kathrine Wehus, J. Richard Bond, Patrick C. Breysse, Morgan Catha, Sarah E. Church, Dongwoo T. Chung, Clive Dickinson, Delaney A. Dunne, Todd Gaier, Joshua Ott Gundersen, Andrew Harris, Richard Hobbs, James W. Lamb, Charles R. Lawrence, Norman Murray, Anthony C. S. Readhead, Hamsa Padmanabhan, Timothy J. Pearson, Thomas J. Rennie, David P. Woody
Summary: This article presents the power spectrum methodology used in the first-season COMAP analysis and evaluates the quality of the current data set. Using the Feed-Feed Pseudo-Cross-Spectrum (FPXS) method, the main results are derived, and both noise modeling errors and experimental systematics are taken into account. By applying effective transfer functions, the effects of instrumental beam smoothing and various filter operations are considered. The power spectra obtained in this way help identify a systematic error related to one of the scanning strategies and demonstrate that uncertainties integrate as expected. The FPXS method allows for the estimation of the clustering component of the CO(1-0) power spectrum.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Patrick C. Breysse, Dongwoo T. Chung, Kieran A. Cleary, Havard T. Ihle, Hamsa Padmanabhan, Marta B. Silva, J. Richard Bond, Jowita Borowska, Morgan Catha, Sarah E. Church, Delaney A. Dunne, Hans Kristian Eriksen, Marie Kristine Foss, Todd Gaier, Joshua Ott Gundersen, Andrew Harris, Richard Hobbs, Laura Keating, James W. Lamb, Charles R. Lawrence, Jonas G. S. Lunde, Norman Murray, Timothy J. Pearson, Liju Philip, Maren Rasmussen, Anthony C. S. Readhead, Thomas J. Rennie, Nils-Ole Stutzer, Marco P. Viero, Duncan J. Watts, Ingunn Kathrine Wehus, David P. Woody
Summary: COMAP-EoR is a project aimed at extending CO intensity mapping to the Epoch of Reionization. By adding instruments and a receiver, COMAP-EoR is able to map CO(1-0) and CO(2-1) at reionization redshifts, providing valuable insights into cosmic history.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Marie K. Foss, Havard T. Ihle, Jowita Borowska, Kieran A. Cleary, Hans Kristian Eriksen, Stuart E. Harper, Junhan Kim, James W. Lamb, Jonas G. S. Lunde, Liju Philip, Maren Rasmussen, Nils-Ole Stutzer, Bade D. Uzgil, Duncan J. Watts, Ingunn K. Wehus, David P. Woody, J. Richard Bond, Patrick C. Breysse, Morgan Catha, Sarah E. Church, Dongwoo T. Chung, Clive Dickinson, Delaney A. Dunne, Todd Gaier, Joshua Ott Gundersen, Andrew Harris, Richard Hobbs, Charles R. Lawrence, Norman Murray, Anthony C. S. Readhead, Hamsa Padmanabhan, Timothy J. Pearson, Thomas J. Rennie
Summary: We describe the analysis pipeline of the first-season CO Mapping Array Project (COMAP) that converts raw detector readouts to calibrated sky maps. This pipeline includes four main steps: gain calibration, filtering, data selection, and mapmaking. The resulting data set and maps are analyzed and evaluated in terms of data processing and observing efficiencies.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Dongwoo T. Chung, Patrick C. Breysse, Kieran A. Cleary, Havard T. Ihle, Hamsa Padmanabhan, Marta B. Silva, J. Richard Bond, Jowita Borowska, Morgan Catha, Sarah E. Church, Delaney A. Dunne, Hans Kristian Eriksen, Marie Kristine Foss, Todd Gaier, Joshua Ott Gundersen, Stuart E. Harper, Andrew Harris, Brandon Hensley, Richard Hobbs, Laura C. Keating, Junhan Kim, James W. Lamb, Charles R. Lawrence, Jonas Gahr Sturtzel Lunde, Norman Murray, Timothy J. Pearson, Liju Philip, Maren Rasmussen, Anthony C. S. Readhead, Thomas J. Rennie, Nils-Ole Stutzer, Bade D. Uzgil, Marco P. Viero, Duncan J. Watts, Risa H. Wechsler, Ingunn Kathrine Wehus, David P. Woody
Summary: This article presents the current state of models for the carbon monoxide (CO) line intensity signal at redshift z similar to 3, which is targeted by the CO Mapping Array Project (COMAP) Pathfinder. The Pathfinder's early science results provide a direct 3D constraint on the clustering component of the CO (1-0) power spectrum and improve upon previous indirect measurements. The study also demonstrates the complementary nature of COMAP and interferometric CO surveys, and provides forecasts for future detection of the CO power spectrum and the CO-galaxy cross-spectrum.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan, Patrick Breysse, Adam Lidz, Eric R. Switzer
Summary: This study forecasts the ability of future experiments to detect the fine-structure lines of carbon and oxygen ions during the Epoch of Reionization. The authors also propose methods to improve ground-based and balloon-based surveys, as well as a space-based mission for enhanced cross-correlation measurements.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Dongwoo T. Chung, Ishika Bangari, Patrick C. Breysse, Havard T. Ihle, J. Richard Bond, Delaney A. Dunne, Hamsa Padmanabhan, Liju Philip, Thomas J. Rennie, Marco P. Viero
Summary: We propose the deconvolved distribution estimator (DDE) as an extension of the voxel intensity distribution (VID) in future observations for the CO Mapping Array Project (COMAP). The DDE utilizes the convolution property of the observed VID, which is a combination of correlated signal intensity distributions and uncorrelated noise or interloper intensity distributions. By deconvolving the individual VID from their joint VID in Fourier-space, the DDE reduces sensitivity to interloper emission while maintaining sensitivity to correlated components. The DDE improves upon the VID by minimizing the influence of uncorrelated noise and interloper biases, making it valuable for COMAP observations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan, Abraham Loeb
Summary: We use CHIME catalog data on fast radio bursts (FRBs) to obtain an upper limit on the magnetic field in the intergalactic medium (IGM) on subkiloparsec scales. A nonmagnetized, photoionized IGM cannot explain the scattering of FRBs at all redshifts, but a warm-hot component is marginally consistent with data at z ~ 1. Including a nonzero magnetic field as the lower limit of the smearing distribution leads to upper limits of B < 10-30 nG on scales of 0.07-0.20 kpc in the IGM at z ~ 1-2. Our study introduces a novel technique to constrain small-scale magnetic fields in the IGM, which has not been explored by FRB rotation and dispersion measures.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Hamsa Padmanabhan
Summary: We use ALMA surveys targeting the [C ii] and [O iii] lines, combined with predictions for the evolution of H i, to explore the cross-correlations between 21 cm and submillimetre surveys. Our results show that the [C ii] luminosity-halo mass relation can be described by a double power law, and the autopower spectrum of [C ii] can be detected at all redshifts with an enhanced configuration. We also find that a balloon-borne experiment can detect the 21 cm - [O iii] cross-correlation with the MWA and SKA-LOW out to z similar to 7.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)