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The evolution of the cosmic molecular gas density

Walter, Fabian and Carilli, Chris and Decarli, Roberto and Riechers, Dominik and Aravena, Manuel and Bauer, Franz Erik and Bertoldi, Frank and Bolatto, Alberto and Boogaard, Leindert and Bouwens, Rychard and Burgarella, Denis and Casey, Caitlin and Cooray, Asantha and Cortes, Paolo and Cox, Pierre and Daddi, Emanuele and Darling, Jeremy and Emonts, Bjorn and Gonzalez Lopez, Jorge and Hodge, Jacqueline and Inami, Hanae and Ivison, Rob and Kovetz, Ely and Le Fèvre, Olivier and Magnelli, Benjamin and Marrone, Dan and Murphy, Eric and Narayanan, Desika and Novak, Mladen and Oesch, Pascal and Pavesi, Riccardo and Diaz Santos, Tanio and Sargent, Mark and Scott, Douglas and Scoville, Nick and Stacey, Gordon and Wagg, Jeff and van der Werf, Paul and Uzgil, Bade and Weiss, Axel and Yun, Min (2019) The evolution of the cosmic molecular gas density. Astro2020 Science White Paper, . (Unpublished)

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One of the last missing pieces in the puzzle of galaxy formation and evolution through cosmic history is a detailed picture of the role of the cold gas supply in the star-formation process. Cold gas is the fuel for star formation, and thus regulates the buildup of stellar mass, both through the amount of material present through a galaxy's gas mass fraction, and through the efficiency at which it is converted to stars. Over the last decade, important progress has been made in understanding the relative importance of these two factors along with the role of feedback, and the first measurements of the volume density of cold gas out to redshift 4, (the "cold gas history of the Universe") has been obtained. To match the precision of measurements of the star formation and black-hole accretion histories over the coming decades, a two orders of magnitude improvement in molecular line survey speeds is required compared to what is possible with current facilities. Possible pathways towards such large gains include significant upgrades to current facilities like ALMA by 2030 (and beyond), and eventually the construction of a new generation of radio-to-millimeter wavelength facilities, such as the next generation Very Large Array (ngVLA) concept.

Item Type:Report or Paper (White Paper)
Related URLs:
URLURL TypeDescription Paper
Walter, Fabian0000-0003-4793-7880
Carilli, Chris0000-0001-6647-3861
Decarli, Roberto0000-0002-2662-8803
Riechers, Dominik0000-0001-9585-1462
Aravena, Manuel0000-0002-6290-3198
Bauer, Franz Erik0000-0002-8686-8737
Bertoldi, Frank0000-0002-1707-1775
Bolatto, Alberto0000-0002-5480-5686
Boogaard, Leindert0000-0002-3952-8588
Bouwens, Rychard0000-0002-4989-2471
Casey, Caitlin0000-0002-0930-6466
Cooray, Asantha0000-0002-3892-0190
Cox, Pierre0000-0003-2027-8221
Daddi, Emanuele0000-0002-3331-9590
Darling, Jeremy0000-0003-2511-2060
Hodge, Jacqueline0000-0001-6586-8845
Inami, Hanae0000-0003-4268-0393
Ivison, Rob0000-0001-5118-1313
Le Fèvre, Olivier0000-0001-5891-2596
Magnelli, Benjamin0000-0002-6777-6490
Marrone, Dan0000-0002-2367-1080
Murphy, Eric0000-0001-7089-7325
Narayanan, Desika0000-0002-7064-4309
Novak, Mladen0000-0001-8695-825X
Oesch, Pascal0000-0001-5851-6649
Pavesi, Riccardo0000-0002-2263-646X
Diaz Santos, Tanio0000-0003-0699-6083
Sargent, Mark0000-0003-1033-9684
Scott, Douglas0000-0002-6878-9840
Scoville, Nick0000-0002-0438-3323
van der Werf, Paul0000-0001-5434-5942
Uzgil, Bade0000-0001-8526-3464
Weiss, Axel0000-0003-4678-3939
Yun, Min0000-0001-7095-7543
Group:Infrared Processing and Analysis Center (IPAC), Astronomy Department
Series Name:Astro2020 Science White Paper
Record Number:CaltechAUTHORS:20190328-082302541
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94231
Deposited By: Tony Diaz
Deposited On:29 Mar 2019 15:26
Last Modified:23 Oct 2020 18:23

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