Evidence for universal gas depletion in a sample of 41 luminous Type 1 quasars at z ∼ 2
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A90106%2F25%3A00646726" target="_blank" >RIV/67985815:90106/25:00646726 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1093/mnras/staf769" target="_blank" >https://doi.org/10.1093/mnras/staf769</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/staf769" target="_blank" >10.1093/mnras/staf769</a>
Alternative languages
Result language
angličtina
Original language name
Evidence for universal gas depletion in a sample of 41 luminous Type 1 quasars at z ∼ 2
Original language description
We present ALMA CO observations of the molecular gas in a sample of 41 luminous unobscured quasars at z similar to 2 from the Sloan Digital Sky Survey (SDSS). 32 targets comprise the main sample observed in CO(3-2), and 9 targets have archi v al ALMA data of CO(3-2), CO(4-3), and CO(7-6). All quasars ha ve rest-ultra violet to optical spectra tracing ionized gas in the broad line region (e.g. C IV ) and the narrow line region (e.g. [O III ]) and they cover the full range of outflow properties in the SDSS quasar population at these redshifts. 15 out of the 32 quasars in the main sample are detected in CO(3-2) and five out of the nine archi v al quasars are also detected in CO. The median gas mass for all 20 CO-detected quasars is 8.0 +/- 1.5 x 10(9) M-circle dot with a median M-dyn of 1.4 +/- 0.9 x 10(11) M-circle dot. We find gas fractions in the range 0.02-0.32, which are generally lower than both inactive galaxies and obscured quasars at similar redshifts. We suggest an evolutionary trend in gas fractions of quasar host galaxies from obscured and gas rich to unobscured and gas poor. We note a tentative correlation between the gas fractions and the broad-line region properties with quasars showing high C IV blueshifts, indicating stronger broad-line region winds, having higher gas fractions. Six of the quasars corresponding to 15 per cent of the sample also show evidence for at least one companion galaxy detected in CO at the same redshift.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
—
Continuities
—
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Monthly Notices of the Royal Astronomical Society
ISSN
0035-8711
e-ISSN
1365-2966
Volume of the periodical
540
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
22
Pages from-to
1163-1184
UT code for WoS article
001497612600001
EID of the result in the Scopus database
2-s2.0-105006749704