Article
Astronomy & Astrophysics
Edvige Corbelli, David Thilker, Filippo Mannucci, Giovanni Cresci
Summary: The researchers conducted sensitive searches for (CO)-C-12 J = 1-0 and J = 2-1 lines in the giant extragalactic HI ring in Leo. Their aim was to investigate the star formation process in environments with gas metallicities close to solar but different physical conditions. They wanted to verify the range of validity of known scaling relations.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
F. Valentino, E. Daddi, A. Puglisi, G. E. Magdis, V Kokorev, D. Liu, S. C. Madden, C. Gomez-Guijarro, M-Y Lee, I Cortzen, C. Circosta, I Delvecchio, J. R. Mullaney, Y. Gao, R. Gobat, M. Aravena, S. Jin, S. Fujimoto, J. D. Silverman, H. Dannerbauer
Summary: The study found detectable nuclear activity in about 30% of the sample, with the presence of dusty tori influencing the IR spectral energy distribution of galaxies, but with minimal effects on the excitation of molecular gas.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Sanchez-Garcia, M. Pereira-Santaella, S. Garcia-Burillo, L. Colina, A. Alonso-Herrero, M. Villar-Martin, T. Saito, T. Diaz-Santos, J. Piqueras Lopez, S. Arribas, E. Bellocchi, S. Cazzoli, A. Labiano
Summary: We analysed the star formation relationships in a sample of 16 nearby luminous infrared galaxies, and found a duality in the Kennicutt-Schmidt relation. This duality is related to different dynamical environments within each galaxy and shows different molecular gas and star formation rate at different radii. The star formation efficiency increases with increasing boundedness in galaxies with dual behaviour.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
F. P. Israel
Summary: New measurements of 46 nearby galaxy centers in up to three transitions of HCN, HNC, and HCO+ combined with literature surveys establish a database of 130 galaxies measured in both HCN and HCO+, and 94 galaxies in HNC as well. The relations between normalized luminosities and line ratios are mainly influenced by distance effects, and do not reflect galaxy physical properties. Individual galaxies show significant dispersion in both their luminosity and line ratio.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Emanuel Sillero, Patricia B. Tissera, Diego G. Lambas, Stefano Bovino, Dominik R. Schleicher, Tommaso Grassi, Gustavo Bruzual, Stephane Charlot
Summary: p-gadget3-k is an updated version of gadget-3 that incorporates the chemistry package krome. It tracks the hydrodynamical and chemical evolution of cosmic structures and shows good agreement with observable properties of molecular gas in star-forming galaxies. The model's ability to simulate characteristics of molecular gas makes it valuable for understanding star formation processes.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Eduardo Gonzalez-Alfonso, Jacqueline Fischer, Javier R. Goicoechea, Chentao Yang, Miguel Pereira-Santaella, Kenneth P. Stewart
Summary: H2O submillimeter emission is a powerful diagnostic tool for studying the molecular interstellar medium. This study proposes two diagnostics to distinguish between different excitation mechanisms and finds that in most (extra)galactic sources, the H2O submillimeter line excitation is dominated by far-infrared pumping.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
R. Canameras, N. P. H. Nesvadba, R. Kneissl, S. Koenig, C. Yang, A. Beelen, R. Hill, E. Le Floc'h, D. Scott
Summary: The observations of high-density tracer molecules in three lensed dusty star-forming galaxies reveal comparable distributions of dense and diffuse gas reservoirs, ruling out major effects from differential lensing. The dense-gas excitation is characterized by high-density phases, with dense-gas mass fractions falling near the upper envelope of local ULIRGs. Despite higher gas fractions at high redshift, the dense-gas budget of rapidly star-forming galaxies seems to have evolved little between z similar to 3 and z similar to 0.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
D. Burgarella, J. Bogdanoska, A. Nanni, S. Bardelli, M. Bethermin, M. Boquien, V Buat, A. L. Faisst, M. Dessauges-Zavadsky, Y. Fudamoto, S. Fujimoto, M. Giavalisco, M. Ginolfi, C. Gruppioni, N. P. Hathi, E. Ibar, G. C. Jones, A. M. Koekemoer, K. Kohno, B. C. Lemaux, D. Narayanan, P. Oesch, M. Ouchi, D. A. Riechers, F. Pozzi, M. Romano, D. Schaerer, M. Talia, P. Theule, D. Vergani, G. Zamorani, E. Zucca, P. Cassata
Summary: Star-forming galaxies at high redshifts exhibit low stellar mass and low dust attenuation. By combining infrared and submillimeter emissions and utilizing redshift as a spectrograph, the physical properties of these galaxies were studied to decipher the nature of dust cycle and stellar populations. The study also found redshift evolution in the mass-attenuation relation and in the IRX-beta(FUV) diagram.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. Maragkoudakis, E. Peeters, A. Ricca
Summary: This study examines the variations in spectral characteristics and intensities of polycyclic aromatic hydrocarbons (PAHs) in two different scenarios of PAH processing: destruction of small PAHs or formation of large PAHs, and vice versa. PAH emission was measured with and without plateau components. The results show that smaller PAHs have a larger impact on the PAH band strengths, and smaller PAHs primarily contribute to plateau emission. The 7.7/(11.0 + 11.2) μm PAH band ratio is the best choice for tracing PAH charge, and the 3.3/(11.2 + 11.0) μm PAH band ratio is efficient for both tracing PAH size and characterizing the dominant processing or formation scenario.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Rogerio Riffel, Nicolas D. Mallmann, Gabriele S. Ilha, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Sandro B. Rembold, Dmitry Bizyaev, Janaina C. do Nascimento, Jaderson S. Schimoia, Luiz N. da Costa, Nicholas Fraser Boardman, Mederic Boquien, Guilherme S. Couto
Summary: The study found that consistent results can be obtained through stellar population synthesis and gas wavelength extinction, and established an effective conversion relationship. In addition, the ratio of gas to stellar extinction varies within a certain range, indicating that the difference in extinction may be related to the age and degree of influence of the stellar population.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Rogerio Riffel, Nicolas D. Mallmann, Gabriele S. Ilha, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Sandro B. Rembold, Dmitry Bizyaev, Janaina C. do Nascimento, Jaderson S. Schimoia, Luiz N. da Costa, Nicholas Fraser Boardman, Mederic Boquien, Guilherme S. Couto
Summary: This study investigates the impact of active galactic nuclei (AGNs) feedback on host galaxies and its role in enhancing or suppressing star formation. By comparing 170 AGN hosts and a control sample of 291 galaxies, it was found that the SFR derived from the stellar population over the past 20 Myr closely matches the SFR derived from the gas.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
J. Braine, Y. Sun, Y. Shimajiri, F. F. S. van der Tak, M. Fang, Ph. Andre, H. Chen, Y. Gao
Summary: In this study, maps and spectra of the HCN(1-0) and HCO+(1-0) lines in the extreme outer Galaxy were obtained using the Delingha telescope. The aim was to investigate the structure of molecular clouds in subsolar metallicity regions and their relation with star formation. The results showed that the HCN emission is optically thin and the HCO+ emission is stronger, indicating a low-density solution for the dense gas. The correlation between star formation and dense gas was found to be poor.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
C. De Breuck, A. Lundgren, B. Emonts, S. Kolwa, H. Dannerbauer, M. Lehnert
Summary: We detected the [CII] 15811111 emission from the Spiderweb galaxy at z = 2.1612 using APEX. The [CII] components are consistent with other AGN and star-forming galaxies in terms of CO and far-IR luminosity ratios. The CGM component dominates the [CII] emission.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Jeong Un Jo, Soyoung Youn, Sungeun Kim, Youngjee Park, Jihye Hwang, Joo Hoon Lee, Gwanjeong Kim
Summary: The study analyzed the star formation rates (SFRs) of galaxies with redshifts of 0 < z < 6, revealing a slightly steeper slope at lower and intermediate redshifts 0 < z < 2. The SFRD was found to decline steeply from z = 1 to 0, but a peak was measured at approximately z = 2.2 - 2.4.
ASTROPHYSICS AND SPACE SCIENCE
(2021)
Article
Astronomy & Astrophysics
A. Alonso-Herrero, S. Garcia-Burillo, S. F. Honig, I Garcia-Bernete, C. Ramos Almeida, O. Gonzalez-Martin, E. Lopez-Rodriguez, P. G. Boorman, A. J. Bunker, L. Burtscher, F. Combes, R. Davies, T. Diaz-Santos, P. Gandhi, B. Garcia-Lorenzo, E. K. S. Hicks, L. K. Hunt, K. Ichikawa, M. Imanishi, T. Izumi, A. Labiano, N. A. Levenson, C. Packham, M. Pereira-Santaella, C. Ricci, D. Rigopoulou, P. Roche, D. J. Rosario, D. Rouan, T. Shimizu, M. Stalevski, K. Wada, D. Williamson
Summary: By comparing high angular resolution mid-IR and ALMA far-IR images of Seyfert galaxies, it was found that the unresolved emission in the mid-IR contributes significantly to the nuclear emission, while the ALMA far-IR emission is mostly resolved along the equatorial direction of the torus. The study also suggests the presence of polar and/or equatorial dusty winds in galaxies with favorable Eddington ratios and nuclear hydrogen column densities.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
A. C. Posses, M. Aravena, J. Gonzalez-Lopez, R. J. Assef, T. Lambert, G. C. Jones, R. J. Bouwens, D. Brisbin, T. Diaz-Santos, R. Herrera-Camus, C. Ricci, R. Smit
Summary: In this study, we analyze the spatial distribution and kinematics of the cold ionized gas in the galaxy COS-2987030247 and find that it is interacting with other gas. The cold ionized gas is found to have a similar spatial distribution to the rest-frame UV emission, suggesting that it originates from star-forming regions. The velocity map of the galaxy shows signs of ordered motion, indicating that COS-2987030247 is a rotating disk.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Trystan S. Lambert, A. Posses, M. Aravena, J. Gonzalez-Lopez, R. J. Assef, T. Diaz-Santos, D. Brisbin, R. Decarli, R. Herrera-Camus, J. Mejia, C. Ricci
Summary: In order to accurately study galaxy evolution and mass assembly at high-redshift, it is necessary to observe 'normal' main sequence galaxies. This study presents ALMA observations of the [C II] emission line of a main sequence galaxy at z = 5.25, and finds strong evidence of extended [C II] emission compared to rest-frame UV observations. The morphology and kinematics of the system suggest a merging event leading to a non-rotating disc system.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
L. Armus, T. Lai, V. U, K. L. Larson, T. Diaz-Santos, A. S. Evans, M. A. Malkan, J. Rich, A. M. Medling, D. R. Law, H. Inami, F. Muller-Sanchez, V. Charmandaris, P. van der Werf, S. Stierwalt, S. Linden, G. C. Privon, L. Barcos-Munoz, C. Hayward, Y. Song, P. Appleton, S. Aalto, T. Bohn, T. Boker, M. J. I. Brown, L. Finnerty, J. Howell, K. Iwasawa, F. Kemper, J. Marshall, J. M. Mazzarella, J. McKinney, E. J. Murphy, D. Sanders, J. Surace
Summary: We observed the nearby Seyfert galaxy NGC 7469 using the MIRI instrument on JWST, capturing a high-resolution nuclear spectrum consisting of 19 emission lines. The high-ionization lines exhibited broad, blueshifted emission indicating a decelerating, stratified outflow from the nucleus. The estimated mass outflow rate was larger than the black hole accretion rate needed to power the AGN. Additionally, we detected rotational H-2 emission lines and a weak PAH feature. These early MIRI mid-infrared IFU observations demonstrate the capabilities of JWST in studying the interstellar media surrounding active supermassive black holes.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Thomas Bohn, Hanae Inami, Tanio Diaz-Santos, Lee Armus, S. T. Linden, U. Vivian, Jason Surace, Kirsten L. Larson, Aaron S. Evans, Shunshi Hoshioka, Thomas Lai, Yiqing Song, Joseph M. Mazzarella, Loreto Barcos-Munoz, Vassilis Charmandaris, Justin H. Howell, Anne M. Medling, George C. Privon, Jeffrey A. Rich, Sabrina Stierwalt, Susanne Aalto, Torsten Boker, Michael J. I. Brown, Kazushi Iwasawa, Matthew A. Malkan, Paul P. van der Werf, Philip Appleton, Christopher C. Hayward, Francisca Kemper, David Law, Jason Marshall, Eric J. Murphy, David Sanders
Summary: We used the James Webb Space Telescope to image NGC 7469 in the near-infrared and mid-infrared. The imaging revealed 66 star-forming regions, 37 of which were not detected by the Hubble Space Telescope. These newly identified regions show high levels of dust obscuration and contribute significantly to the overall infrared luminosity. The results demonstrate the effectiveness of JWST in uncovering hidden star formation in dense environments around active galactic nuclei.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
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
Roberto Decarli, Antonio Pensabene, Tanio Diaz-Santos, Carl Ferkinhoff, Michael A. Strauss, Bram P. Venemans, Fabian Walter, Eduardo Banados, Frank Bertoldi, Xiaohui Fan, Emanuele Paolo Farina, Dominik A. Riechers, Hans-Walter Rix, Ran Wang
Summary: This study presents a multi-line investigation of the interstellar medium in the early universe, providing insights into the formation and evolution of galaxies. The physical conditions of the interstellar medium play a critical role in understanding the properties and processes of cosmic dawn.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
J. Rich, S. Aalto, A. S. Evans, V. Charmandaris, G. C. Privon, T. Lai, H. Inami, S. Linden, L. Armus, T. Diaz-Santos, P. Appleton, L. Barcos-Munoz, T. Boker, K. L. Larson, D. R. Law, M. A. Malkan, A. M. Medling, Y. Song, P. van der Werf, T. Bohn, M. J. I. Brown, L. Finnerty, C. Hayward, J. Howell, K. Iwasawa, F. Kemper, J. Marshall, J. M. Mazzarella, J. McKinney, F. Muller-Sanchez, E. J. Murphy, D. Sanders, B. T. Soifer, S. Stierwalt, J. Surace
Summary: We conducted integral-field spectroscopy on the nearby luminous infrared galaxy VV 114 using the MIRI and NIRSpec instruments. Our results reveal the presence of an active galactic nucleus in the SW core and provide evidence of deeply embedded star formation as well as extended shocked regions and outflows in the NE core. These observations are crucial for understanding the physical properties of VV 114.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Sean T. Linden, Aaron S. Evans, Lee Armus, Jeffrey A. Rich, Kirsten L. Larson, Thomas Lai, George C. Privon, U. Vivian, Hanae Inami, Thomas Bohn, Yiqing Song, Loreto Barcos-Munoz, Vassilis Charmandaris, Anne M. Medling, Sabrina Stierwalt, Tanio Diaz-Santos, Torsten Boker, Paul van der Werf, Susanne Aalto, Philip Appleton, Michael J. I. Brown, Christopher C. Hayward, Justin H. Howell, Kazushi Iwasawa, Francisca Kemper, David T. Frayer, David Law, Matthew A. Malkan, Jason Marshall, Joseph M. Mazzarella, Eric J. Murphy, David Sanders, Jason Surace
Summary: We used the NIRCam of the James Webb Space Telescope to investigate the young massive star cluster population in the luminous infrared galaxy VV 114. We identified 374 compact YMC candidates and found that 20% of them are undetected at optical wavelengths. The discovery of hidden sources in VV 114 significantly increased the number of young star clusters and confirmed a steep age distribution slope for all the massive star clusters.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
A. P. S. Hygate, J. A. Hodge, E. da Cunha, M. Rybak, S. Schouws, H. Inami, M. Stefanon, L. Graziani, R. Schneider, P. Dayal, R. J. Bouwens, R. Smit, R. A. A. Bowler, R. Endsley, V Gonzalez, P. A. Oesch, D. P. Stark, H. S. B. Algera, M. Aravena, L. Barrufet, A. Ferrara, Y. Fudamoto, J. H. A. Hilhorst, I De Looze, T. Nanayakkara, A. Pallottini, D. A. Riechers, L. Sommovigo, M. W. Topping, P. van der Werf
Summary: We present the observations of REBELS25, a massive and morphologically complex ULIRG at high redshift, and determine its properties such as mass and star formation rate. Our findings suggest that REBELS25 has the potential to evolve into a high-mass quiescent galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
D. Blanquez-Sese, G. E. Magdis, C. Gomez-Guijarro, M. Shuntov, V. Kokorev, G. Brammer, F. Valentino, T. Diaz-Santos, E. -D. Paspaliaris, D. Rigopoulou, J. Hjorth, D. Langeroodi, R. Gobat, S. Jin, N. B. Sillassen, S. Gillman, T. R. Greve, M. Lee
Summary: This study investigates the mid-infrared (MIR) emission of quiescent galaxies (QGs) beyond the local universe. By analyzing the MIR spectra of intermediate redshift QGs, the researchers find that these galaxies have a range of MIR spectra composed of stellar and dust components, with the dust emission being much fainter than that of star-forming galaxies. The observed scatter in the MIR spectra can be attributed to variations in dust continuum levels and/or the presence of polycyclic aromatic hydrocarbon features. The study also provides a panchromatic UV to radio spectral energy distribution (SED) template for future exploration of the interstellar medium of high-redshift QGs.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Dejene Zewdie, Roberto J. Assef, Chiara Mazzucchelli, Manuel Aravena, Andrew W. Blain, Tanio Diaz-Santos, Peter R. M. Eisenhardt, Hyunsung D. Jun, Daniel Stern, Chao-Wei Tsai, Jingwen W. Wu
Summary: We have identified LBG candidates around the known Hot DOG W2246-0526, suggesting an early evolutionary stage for the proto-cluster. The surface density of LBG candidates is higher in the vicinity of W2246-0526, possibly indicating an influence on the intergalactic medium transparency.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
P. N. Appleton, P. Guillard, Bjorn Emonts, Francois Boulanger, Aditya Togi, William T. Reach, Kathleen Alatalo, M. Cluver, T. Diaz Santos, P. -a. Duc, S. Gallagher, P. Ogle, E. O'Sullivan, K. Voggel, C. K. Xu
Summary: This study combines JWST and Hubble telescope imaging with ALMA spectroscopy to investigate the turbulent intergalactic medium in Stephan's Quintet. The observations reveal the dissipation of kinetic energy and the destruction/recycling of cold molecular clouds, providing insights into the dynamics and excitation of warm gas.
ASTROPHYSICAL JOURNAL
(2023)