The EDGE-CALIFA Survey: Interferometric Observations of 126 Galaxies with CARMA
Open Access
- 10 September 2017
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 846 (2), 159
- https://doi.org/10.3847/1538-4357/aa86aa
Abstract
We present interferometric CO observations, made with the Combined Array for Millimeter-wave Astronomy (CARMA) interferometer, of galaxies from the Extragalactic Database for Galaxy Evolution survey (EDGE). These galaxies are selected from the Calar Alto Legacy Integral Field Area (CALIFA) sample, mapped with optical integral field spectroscopy. EDGE provides good-quality CO data (3σ sensitivity before inclination correction, resolution ~1.4 kpc) for 126 galaxies, constituting the largest interferometric CO survey of galaxies in the nearby universe. We describe the survey and data characteristics and products, then present initial science results. We find that the exponential scale lengths of the molecular, stellar, and star-forming disks are approximately equal, and galaxies that are more compact in molecular gas than in stars tend to show signs of interaction. We characterize the molecular-to-stellar ratio as a function of Hubble type and stellar mass and present preliminary results on the resolved relations between the molecular gas, stars, and star-formation rate. We then discuss the dependence of the resolved molecular depletion time on stellar surface density, nebular extinction, and gas metallicity. EDGE provides a key data set to address outstanding topics regarding gas and its role in star formation and galaxy evolution, which will be publicly available on completion of the quality assessment.Keywords
This publication has 94 references indexed in Scilit:
- Do galaxy global relationships emerge from local ones? The SDSS IV MaNGA surface mass density–metallicity relationMonthly Notices of the Royal Astronomical Society, 2016
- THE EMPIRE SURVEY: SYSTEMATIC VARIATIONS IN THE DENSE GAS FRACTION AND STAR FORMATION EFFICIENCY FROM FULL-DISK MAPPING OF M51The Astrophysical Journal Letters, 2016
- Kinematic alignment of non-interacting CALIFA galaxiesAstronomy & Astrophysics, 2014
- THE STAR FORMATION LAW IN NEARBY GALAXIES ON SUB-KPC SCALESThe Astronomical Journal, 2008
- On the galaxy stellar mass function, the massmetallicity relation and the implied baryonic mass functionMonthly Notices of the Royal Astronomical Society, 2008
- The Role of Pressure in GMC Formation II: The H2‐Pressure RelationThe Astrophysical Journal, 2006
- The Role of Pressure in Giant Molecular Cloud FormationThe Astrophysical Journal, 2004
- The Optical and Near‐Infrared Properties of Galaxies. I. Luminosity and Stellar Mass FunctionsThe Astrophysical Journal Supplement Series, 2003
- Classification parameters for the emission-line spectra of extragalactic objectsPublications of the Astronomical Society of the Pacific, 1981
- The origin and lifetime of giant molecular cloud complexesThe Astrophysical Journal, 1980