publication . Article . Preprint . 2018 . Embargo end date: 01 Jan 2018

Cold gas in a complete sample of group-dominant early-type galaxies

Ewan O'Sullivan; Francoise Combes; P. Salomé; Laurence P. David; Arif Babul; Jan M. Vrtilek; Jeremy Lim; V. Olivares; Somak Raychaudhury; G. Schellenberger;
Open Access
  • Published: 01 Jan 2018
  • Publisher: arXiv
  • Country: France
Abstract
We present IRAM 30m and APEX telescope observations of CO(1-0) and CO(2-1) lines in 36 group-dominant early-type galaxies, completing our molecular gas survey of dominant galaxies in the Complete Local-volume Groups Sample. We detect CO emission in 12 of the galaxies at >4sigma significance, with molecular gas masses in the range 0.01-6x10^8 Msol, as well as CO in absorption in the non-dominant group member galaxy NGC 5354. In total 21 of the 53 CLoGS dominant galaxies are detected in CO and we confirm our previous findings that they have low star formation rates (0.01-1 Msol/yr) but short depletion times (<1Gyr) implying rapid replenishment of their gas r...
Subjects
Fields of Science and Technology classification: 01 natural sciences0103 physical sciences010308 nuclear & particles physics010303 astronomy & astrophysics
Sustainable Development Goals: 13. Climate action14. Life underwater
free text keywords: Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, radio lines: galaxies, galaxies: star formation, galaxies: elliptical and lenticular cD, galaxies: groups: general, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Space and Planetary Science, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics, Virgo Cluster, Population, education.field_of_study, education, Galaxy, Star formation, Group (periodic table), Sample (material), Luminosity, Absorption (chemistry), Physics
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Funded by
ANR| LYRICS
Project
LYRICS
Gas Life cYcle around galaxies : oRIgin and state of Cold accretion Streams
  • Funder: French National Research Agency (ANR) (ANR)
  • Project Code: ANR-16-CE31-0011
,
NSERC
Project
  • Funder: Natural Sciences and Engineering Research Council of Canada (NSERC)
,
EC| MOMENTUM
Project
MOMENTUM
Angular momentum transfer in galaxy formation and evolution
  • Funder: European Commission (EC)
  • Project Code: 267399
  • Funding stream: FP7 | SP2 | ERC
Supplementary Outcomes
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