Evidence for universal gas depletion in a sample of 41 luminous Type 1 quasars at z ∼ 2

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Evidence for universal gas depletion in a sample of 41 luminous Type 1 quasars at z ∼ 2

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Evidence for universal gas depletion in a sample of 41 luminous Type 1 quasars at z ∼ 2

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

—

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

540

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

22

Strana od-do

1163-1184

Kód UT WoS článku

001497612600001

EID výsledku v databázi Scopus

2-s2.0-105006749704