The Extended Mapping Obscuration to Reionization with ALMA (Ex-MORA) Survey: 5$σ$ Source Catalog and Redshift Distribution

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Autori principali:	Long, Arianna S., Casey, Caitlin M., McKinney, Jed, Zavala, Jorge A., Akins, Hollis B., Cooper, Olivia R., Lambrides, Matthieu Bethermin Erini L., Franco, Maximilien, Caputi, Karina, Champagne, Jaclyn B., Man, Allison W. S., Treister, Ezequiel, Manning, Sinclaire M., Sanders, David B., Talia, Margherita, Aravena, Manuel, Clements, D. L., da Cunha, Elisabete, Faisst, Andreas L., Gentile, Fabrizio, Hodge, Jacqueline, Brammer, Gabriel, Brusa, Marcella, Finkelstein, Steven L., Fujimoto, Seiji, Hayward, Christopher C., Ilbert, Olivier, Jolly, Jean-Baptiste, Kartaltepe, Jeyhan S., Knudsen, Kirsten, Koekemoer, Anton M., Liu, Daizhong, Magdis, Georgios, McCracken, Henry Joy, Rhodes, Jason, Robertson, Brant E., Scoville, Nick, Sheth, Kartik, Smolcic, Vernesa, Spilker, Justin, Taniguchi, Yoshiaki, Toft, Sune, Urry, C. Megan, Yun, Min
Natura:	Preprint
Pubblicazione:	2024
Soggetti:	Astrophysics of Galaxies
Accesso online:	Acceder al recurso
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_version_	1866910577921622016
author	Long, Arianna S. Casey, Caitlin M. McKinney, Jed Zavala, Jorge A. Akins, Hollis B. Cooper, Olivia R. Lambrides, Matthieu Bethermin Erini L. Franco, Maximilien Caputi, Karina Champagne, Jaclyn B. Man, Allison W. S. Treister, Ezequiel Manning, Sinclaire M. Sanders, David B. Talia, Margherita Aravena, Manuel Clements, D. L. da Cunha, Elisabete Faisst, Andreas L. Gentile, Fabrizio Hodge, Jacqueline Brammer, Gabriel Brusa, Marcella Finkelstein, Steven L. Fujimoto, Seiji Hayward, Christopher C. Ilbert, Olivier Jolly, Jean-Baptiste Kartaltepe, Jeyhan S. Knudsen, Kirsten Koekemoer, Anton M. Liu, Daizhong Magdis, Georgios McCracken, Henry Joy Rhodes, Jason Robertson, Brant E. Scoville, Nick Sheth, Kartik Smolcic, Vernesa Spilker, Justin Taniguchi, Yoshiaki Toft, Sune Urry, C. Megan Yun, Min
author_facet	Long, Arianna S. Casey, Caitlin M. McKinney, Jed Zavala, Jorge A. Akins, Hollis B. Cooper, Olivia R. Lambrides, Matthieu Bethermin Erini L. Franco, Maximilien Caputi, Karina Champagne, Jaclyn B. Man, Allison W. S. Treister, Ezequiel Manning, Sinclaire M. Sanders, David B. Talia, Margherita Aravena, Manuel Clements, D. L. da Cunha, Elisabete Faisst, Andreas L. Gentile, Fabrizio Hodge, Jacqueline Brammer, Gabriel Brusa, Marcella Finkelstein, Steven L. Fujimoto, Seiji Hayward, Christopher C. Ilbert, Olivier Jolly, Jean-Baptiste Kartaltepe, Jeyhan S. Knudsen, Kirsten Koekemoer, Anton M. Liu, Daizhong Magdis, Georgios McCracken, Henry Joy Rhodes, Jason Robertson, Brant E. Scoville, Nick Sheth, Kartik Smolcic, Vernesa Spilker, Justin Taniguchi, Yoshiaki Toft, Sune Urry, C. Megan Yun, Min
contents	One of the greatest challenges in galaxy evolution over the last decade has been constraining the prevalence of heavily dust-obscured galaxies in the early Universe. At $z>3$, these galaxies are increasingly rare, and difficult to identify as they are interspersed among the more numerous dust-obscured galaxy population at $z=1-3$, making efforts to secure confident spectroscopic redshifts expensive, and sometimes unsuccessful. In this work, we present the Extended Mapping Obscuration to Reionization with ALMA (Ex-MORA) Survey -- a 2mm blank-field survey in the COSMOS-Web field, and the largest ever ALMA blank-field survey to-date covering 577 arcmin$^2$. Ex-MORA is an expansion of the MORA survey designed to identify primarily $z>3$ dusty, star-forming galaxies while simultaneously filtering out the more numerous $z<3$ population by leveraging the very negative $K$-correction at observed-frame 2mm. We identify 37 significant ($>$5$σ$) sources, 33 of which are robust thermal dust emitters. We measure a median redshift of $\langle z \rangle = 3.6^{+0.1}_{-0.2}$, with two-thirds of the sample at $z>3$, and just under half at $z>4$, demonstrating the overall success of the 2mm-selection technique. The integrated $z>3$ volume density of Ex-MORA sources is $\sim1-3\times10^{-5}$ Mpc$^{-3}$, consistent with other surveys of infrared luminous galaxies at similar epochs. We also find that techniques using rest-frame optical emission (or lack thereof) to identify $z>3$ heavily dust-obscured galaxies miss at least half of Ex-MORA galaxies. This supports the idea that the dusty galaxy population is heterogeneous, and that synergies across observatories spanning multiple energy regimes are critical to understanding their formation and evolution at $z>3$.
format	Preprint
id	arxiv_https___arxiv_org_abs_2408_14546
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	The Extended Mapping Obscuration to Reionization with ALMA (Ex-MORA) Survey: 5$σ$ Source Catalog and Redshift Distribution Long, Arianna S. Casey, Caitlin M. McKinney, Jed Zavala, Jorge A. Akins, Hollis B. Cooper, Olivia R. Lambrides, Matthieu Bethermin Erini L. Franco, Maximilien Caputi, Karina Champagne, Jaclyn B. Man, Allison W. S. Treister, Ezequiel Manning, Sinclaire M. Sanders, David B. Talia, Margherita Aravena, Manuel Clements, D. L. da Cunha, Elisabete Faisst, Andreas L. Gentile, Fabrizio Hodge, Jacqueline Brammer, Gabriel Brusa, Marcella Finkelstein, Steven L. Fujimoto, Seiji Hayward, Christopher C. Ilbert, Olivier Jolly, Jean-Baptiste Kartaltepe, Jeyhan S. Knudsen, Kirsten Koekemoer, Anton M. Liu, Daizhong Magdis, Georgios McCracken, Henry Joy Rhodes, Jason Robertson, Brant E. Scoville, Nick Sheth, Kartik Smolcic, Vernesa Spilker, Justin Taniguchi, Yoshiaki Toft, Sune Urry, C. Megan Yun, Min Astrophysics of Galaxies One of the greatest challenges in galaxy evolution over the last decade has been constraining the prevalence of heavily dust-obscured galaxies in the early Universe. At $z>3$, these galaxies are increasingly rare, and difficult to identify as they are interspersed among the more numerous dust-obscured galaxy population at $z=1-3$, making efforts to secure confident spectroscopic redshifts expensive, and sometimes unsuccessful. In this work, we present the Extended Mapping Obscuration to Reionization with ALMA (Ex-MORA) Survey -- a 2mm blank-field survey in the COSMOS-Web field, and the largest ever ALMA blank-field survey to-date covering 577 arcmin$^2$. Ex-MORA is an expansion of the MORA survey designed to identify primarily $z>3$ dusty, star-forming galaxies while simultaneously filtering out the more numerous $z<3$ population by leveraging the very negative $K$-correction at observed-frame 2mm. We identify 37 significant ($>$5$σ$) sources, 33 of which are robust thermal dust emitters. We measure a median redshift of $\langle z \rangle = 3.6^{+0.1}_{-0.2}$, with two-thirds of the sample at $z>3$, and just under half at $z>4$, demonstrating the overall success of the 2mm-selection technique. The integrated $z>3$ volume density of Ex-MORA sources is $\sim1-3\times10^{-5}$ Mpc$^{-3}$, consistent with other surveys of infrared luminous galaxies at similar epochs. We also find that techniques using rest-frame optical emission (or lack thereof) to identify $z>3$ heavily dust-obscured galaxies miss at least half of Ex-MORA galaxies. This supports the idea that the dusty galaxy population is heterogeneous, and that synergies across observatories spanning multiple energy regimes are critical to understanding their formation and evolution at $z>3$.
title	The Extended Mapping Obscuration to Reionization with ALMA (Ex-MORA) Survey: 5$σ$ Source Catalog and Redshift Distribution
topic	Astrophysics of Galaxies
url	https://arxiv.org/abs/2408.14546

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