Article
Astronomy & Astrophysics
J. Cairns, D. L. Clements, J. Greenslade, G. Petitpas, T. Cheng, Y. Ding, A. Parmar, I Perez-Fournon, D. Riechers
Summary: In this study, we conducted observations using SCUBA-2 and SMA to investigate four candidate high-redshift dusty star-forming galaxies. We detected multiple systems in three of the sources, indicating the presence of additional sources below the SMA detection limit. Photometric redshift estimates suggest that three of the sources are likely at z >= 2. Furthermore, the analysis of SCUBA-2 850 mu m maps revealed that one of the sources could potentially reside in a z >= 2 protocluster.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
G. J. Bendo, S. A. Urquhart, S. Serjeant, T. Bakx, M. Hagimoto, P. Cox, R. Neri, M. D. Lehnert, H. Dannerbauer, A. Amvrosiadis, P. Andreani, A. J. Baker, A. Beelen, S. Berta, E. Borsato, V Buat, K. M. Butler, A. Cooray, G. De Zotti, L. Dunne, S. Dye, S. Eales, A. Enia, L. Fan, R. Gavazzi, J. Gonzalez-Nuevo, A. Harris, C. N. Herrera, D. H. Hughes, D. Ismail, B. M. Jones, K. Kohno, M. Krips, G. Lagache, L. Marchetti, M. Massardi, H. Messias, M. Negrello, A. Omont, I Perez-Fournon, D. A. Riechers, D. Scott, M. W. L. Smith, F. Stanley, Y. Tamura, P. Temi, P. van der Werf, A. Verma, C. Vlahakis, A. Weiss, C. Yang, A. J. Young
Summary: We present ALMA continuum images of 85 fields selected from Herschel observations. Most of the fields are expected to contain gravitationally lensed or hyperluminous infrared galaxies. We found that about half of the Herschel sources were resolved into multiple ALMA sources and the brightest Herschel sources corresponded to individual ALMA sources. The results suggest that the color temperatures of the sources do not vary significantly with redshift and the dust emissivity indices are largely consistent.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
M. Hagimoto, T. J. L. C. Bakx, S. Serjeant, G. J. Bendo, S. A. Urquhart, S. Eales, K. C. Harrington, Y. Tamura, H. Umehata, S. Berta, A. R. Cooray, P. Cox, G. De Zotti, M. D. Lehnert, D. A. Riechers, D. Scott, P. Temi, P. P. van der Werf, C. Yang, A. Amvrosiadis, P. M. Andreani, A. J. Baker, A. Beelen, E. Borsato, V Buat, K. M. Butler, H. Dannerbauer, L. Dunne, S. Dye, A. F. M. Enia, L. Fan, R. Gavazzi, J. Gonzalez-Nuevo, A. Harris, C. N. Herrera, D. H. Hughes, D. Ismail, R. J. Ivison, B. Jones, K. Kohno, M. Krips, G. Lagache, L. Marchetti, M. Massardi, H. Messias, M. Negrello, R. Neri, A. Omont, I Perez-Fournon, C. Sedgwick, M. W. L. Smith, F. Stanley, A. Verma, C. Vlahakis, B. Ward, C. Weiner, A. Weiss, A. J. Young
Summary: We analyze emission lines in 71 bright Herschel-selected galaxies detected by the ALMA, finding similar interstellar medium conditions and gas-to-dust ratios to local infrared-luminous galaxies and high-redshift dusty star-forming galaxies. However, these galaxies have denser gas and more intense far-ultraviolet radiation fields. The gas-to-dust ratios appear to be consistent with Milky Way values without any significant redshift evolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Bo Han Chen, Tomotsugu Goto, Seong Jin Kim, Ting Wen Wang, Daryl Joe D. Santos, Simon C-C Ho, Tetsuya Hashimoto, Artem Poliszczuk, Agnieszka Pollo, Sascha Trippe, Takamitsu Miyaji, Yoshiki Toba, Matthew Malkan, Stephen Serjeant, Chris Pearson, Ho Seong Hwang, Eunbin Kim, Hyunjin Shim, Ting Yi Lu, Yu-Yang Hsiao, Ting-Chi Huang, Martin Herrera-Endoqui, Blanca Bravo-Navarro, Hideo Matsuhara
Summary: This study introduces a novel AGN recognition method based on Deep Neural Network, aiming to address the AGN recognition problem in the North Ecliptic Pole Wide field and demonstrate its superior performance compared to the traditional SED fitting method. The experimental results show that the NN recognition accuracy ranges from 80.29% to 85.15%, with evaluations on AGN completeness and SFG completeness.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Bo Han Chen, Tomotsugu Goto, Seong Jin Kim, Ting Wen Wang, Daryl Joe D. Santos, Simon C-C Ho, Tetsuya Hashimoto, Artem Poliszczuk, Agnieszka Pollo, Sascha Trippe, Takamitsu Miyaji, Yoshiki Toba, Matthew Malkan, Stephen Serjeant, Chris Pearson, Ho Seong Hwang, Eunbin Kim, Hyunjin Shim, Ting Yi Lu, Yu-Yang Hsiao, Ting-Chi Huang, Martin Herrera-Endoqui, Blanca Bravo-Navarro, Hideo Matsuhara
Summary: This study introduces a novel method for AGN recognition based on neural networks, which outperforms traditional SED fitting methods and shows improved performance in the NEPW field. The recognition accuracy of the method ranges from 80.29% to 85.15%, with high completeness rates for both AGNs and SFGs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Gergo Popping, Annalisa Pillepich, Gabriela Calistro Rivera, Sebastian Schulz, Lars Hernquist, Melanie Kaasinen, Federico Marinacci, Dylan Nelson, Mark Vogelsberger
Summary: We present predictions for the extent of the dust-continuum emission of main-sequence galaxies at z = 1-5. Our results suggest that the observed compact dust-continuum emission in high-redshift galaxies may not be evidence of a dense central stellar component. The dust-continuum half-light radius closely follows the radius containing half the star formation and half the dust mass in galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Jianhang Chen, R. J. Ivison, Martin A. Zwaan, Ian Smail, Anne Klitsch, Celine Peroux, Gergo Popping, Andrew D. Biggs, Roland Szakacs, Aleksandra Hamanowicz, Claudia Lagos
Summary: The ALMACAL project has used the calibration data from the Atacama Large Millimetre/submillimetre Array (ALMA) to map the lines of sight towards and beyond the ALMA calibrators. With over 1000 hours of integration, ALMACAL has detected 186 faint, dusty, star-forming galaxies (DSFGs) and provided benchmark data for models of galaxy formation and evolution. ALMA has resolved about half of the cosmic infrared background in the submm/mm regime.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Andreas Efstathiou, Katarzyna Malek, Denis Burgarella, Peter Hurley, Seb Oliver, Veronique Buat, Raphael Shirley, Steven Duivenvoorden, Vicky Papadopoulou Lesta, Duncan Farrah, Kenneth J. Duncan, Maria del Carmen Campos Varillas
Summary: In this study, a hyperluminous galaxy was discovered at a photometric redshift of approximately 4.3, with the emission mainly dominated by an obscured quasar. The discovery of this obscured hyperluminous quasar, the second of its kind found at z > 4, suggests a possible large population of similar galaxies in the studied fields.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Seunghwan Lim, Ryley Hill, Douglas Scott, Ludovic van Waerbeke, Jean-Charles Cuillandre, Raymond G. Carlberg, Nora Elisa Chisari, Andrej Dvornik, Thomas Erben, Stephen Gwyn, Alan W. McConnachie, Marc-Antoine Miville-Deschenes, Angus H. Wright, Pierre-Alain Duc
Summary: In this study, the cross-correlation between the cosmic far-infrared background and cosmic optical background fluctuations is investigated using Herschel-SPIRE imaging and CFIS Low Surface Brightness data products from UNIONS. The cross-spectrum is measured for two cases: all galaxies are kept in the images or all individually detected galaxies are masked to produce 'background' maps. The study reports the detection of the crosscorrelation signal at λ≥18 arcsec (≥14 sigma sion) and demonstrates the potential of the approach for future surveys.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
A. Efstathiou, D. Farrah, J. Afonso, D. L. Clements, E. Gonzalez-Alfonso, M. Lacy, S. Oliver, V. Papadopoulou Lesta, C. Pearson, D. Rigopoulou, M. Rowan-Robinson, H. W. W. Spoon, A. Verma, L. Wang
Summary: We present the spectral energy distributions (SEDs) of 42 local ultraluminous infrared galaxies (ULIRGs) and fit them with different radiative transfer models. We find that the CYGNUS AGN torus models fit better the SEDs of our sample compared to other models. A minimum dual AGN fraction of 5% is found in the sample.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Swapnil Singh, M. L. N. Ashby, Sarita Vig, S. K. Ghosh, T. Jarrett, T. M. Crawford, Matthew A. Malkan, M. Archipley, J. D. Vieira
Summary: Star-forming galaxies contain both warm and cold dust, with recent discoveries of very cold dust components through millimetre/submillimetre photometry. By modeling spectral energy distributions and using radio and ultraviolet observations, the dust content and mass of different components can be constrained in galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Yung Ying Chen, Hiroyuki Hirashita, Wei-Hao Wang, Naomasa Nakai
Summary: Some studies indicate high dust temperatures in high-redshift LBGs, but there is an observational bias yet to be understood. ALMA tends to miss high-T-d objects, even at high total dust luminosity, and the bias related to dust temperatures in UV-selected LBG samples is complex. There is no tendency of high-T-d LBGs being more easily detected in ALMA Band 6.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
R. K. Cochrane, C. C. Hayward, D. Angles-Alcazar, R. S. Somerville
Summary: There is growing interest in using radiative transfer codes to predict observable fluxes for simulated galaxies through post-processing cosmological simulations. However, this method can be slow and requires assumptions when the simulations do not resolve the interstellar medium. Zoom-in simulations offer better resolution of the interstellar medium and stellar-gas geometry but have limited statistics due to the computational cost.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(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
R. K. Cochrane, P. N. Best, I Smail, E. Ibar, C. Cheng, A. M. Swinbank, J. Molina, D. Sobral, U. Dudzeviciute
Summary: The study presents imaging of SHiZELS-14, a massive and dusty galaxy undergoing vigorous star formation. The galaxy exhibits significant variations in dust attenuation across its spatial extent, leading to discrepant global star-formation rates inferred using different tracers.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)