Authors
Delaney A Dunne, Kieran A Cleary, Patrick C Breysse, Dongwoo T Chung, Håvard T Ihle, J Richard Bond, Hans Kristian Eriksen, Joshua Ott Gundersen, Laura C Keating, Junhan Kim, Jonas Gahr Sturtzel Lunde, Norman Murray, Hamsa Padmanabhan, Liju Philip, Nils-Ole Stutzer, Doğa Tolgay, Ingunn Katherine Wehus, Sarah E Church, Todd Gaier, Andrew I Harris, Richard Hobbs, James W Lamb, Charles R Lawrence, Anthony CS Readhead, David P Woody
Publication date
2024/4/1
Journal
The Astrophysical Journal
Volume
965
Issue
1
Pages
7
Publisher
IOP Publishing
Description
We present a new upper limit on the cosmic molecular gas density at z= 2.4–3.4 obtained using the first year of observations from the CO Mapping Array Project (COMAP). COMAP data cubes are stacked on the 3D positions of 243 quasars selected from the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) catalog, yielding a 95% upper limit for flux from CO (1–0) line emission of 0.129 Jy km s− 1. Depending on the balance of the emission between the quasar host and its environment, this value can be interpreted as an average CO line luminosity
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DA Dunne, KA Cleary, PC Breysse, DT Chung, HT Ihle… - The Astrophysical Journal, 2024