MASCOT -- An ESO-ARO legacy survey of molecular gas in nearby SDSS-MaNGA galaxies: I. first data release, and global and resolved relations between H_2 and stellar content

Abstract

We present the first data release of the MaNGA-ARO Survey of CO Targets (MASCOT), an ESO Public Spectroscopic Survey conducted at the Arizona Radio Observatory (ARO). We measure the CO(1-0) line emission in a sample of 187 nearby galaxies selected from the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey that has obtained integral field unit (IFU) spectroscopy for a sample of ~ 10,000 galaxies at low redshift. The main goal of MASCOT is to probe the molecular gas content of star-forming galaxies with stellar masses > 10^9.5 M_solar and with associated MaNGA IFU observations and well-constrained quantities like stellar masses, star formation rates and metallicities. In this paper we present the first results of the MASCOT survey, providing integrated CO(1-0) measurements that cover several effective radii of the galaxy and present CO luminosities, CO kinematics, and estimated H2 gas masses. We observe that the decline of galaxy star formation rate with respect to the star formation main sequence (SFMS) increases with the decrease of molecular gas and with a reduced star formation efficiency, in agreement with results of other integrated studies. Relating the molecular gas mass fractions with the slope of the stellar age gradients inferred from the MaNGA observations, we find that galaxies with lower molecular gas mass fractions tend to show older stellar populations close to the galactic center, while the opposite is true for galaxies with higher molecular gas mass fractions, providing tentative evidence for inside-out quenching.

12 pages plus 20 pages of data tables and figures, accepted to MNRAS, data will be released as supplementary material with the paper as well as on the MASCOT website (https://wwwstaff.ari.uni-heidelberg.de/dwylezalek/mascot.html)

References in corpus (34)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Overview of the SDSS-IV MaNGA Survey: Mapping Nearby Galaxies at Apache Point Observatory
• Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions
• The Circumgalactic Medium
• xCOLD GASS: the complete IRAM-30m legacy survey of molecular gas for galaxy evolution studies
• COLD GASS, an IRAM legacy survey of molecular gas in massive galaxies: I. Relations between H2, HI, stellar content and structural properties
• The MaNGA Integral Field Unit Fiber Feed System for the Sloan 2.5 m Telescope
• The Data Reduction Pipeline for the SDSS-IV MaNGA IFU Galaxy Survey
• The SDSS-IV MaNGA Sample: Design, Optimization, and Usage Considerations
• SDSS-IV MaNGA IFS Galaxy Survey --- Survey Design, Execution, and Initial Data Quality
• The Cosmic Baryon and Metal Cycles
• Molecular and atomic gas along and across the main sequence of star-forming galaxies
• Molecular Gas and Star Formation in the SAURON Early-type Galaxies
• How do central and satellite galaxies quench? -- Insights from spatially resolved spectroscopy in the MaNGA survey
• The ALMaQUEST Survey: The molecular gas main sequence and the origin of the star forming main sequence
• A Review of Recent Observations of Galactic Winds Driven by Star Formation
• ALLSMOG: an APEX Low-redshift Legacy Survey for MOlecular Gas. I - molecular gas scaling relations, and the effect of the CO/H2 conversion factor
• SDSS-IV MaNGA: Modeling the Spectral Line Spread Function to Sub-Percent Accuracy
• Ionised gas outflow signatures in SDSS-IV MaNGA active galactic nuclei
• HI-MaNGA: HI Followup for the MaNGA Survey
• The ALMaQUEST Survey: III. Scatter in the resolved star forming main sequence is primarily due to variations in star formation efficiency
• The ALMaQUEST Survey: V. The non-universality of kpc-scale star formation relations and the factors that drive them
• SDSS-IV MaNGA: Inside-out vs. outside-in quenching in different local environments
• The final data release of ALLSMOG: a survey of CO in typical local low-M* star-forming galaxies
• The EDGE-CALIFA Survey: Using Optical Extinction to Probe the Spatially-Resolved Distribution of Gas in Nearby Galaxies
• SDSS-IV MaNGA: Identification of active galactic nuclei in optical integral field unit surveys
• The EDGE-CALIFA Survey: Central molecular gas depletion in AGN host galaxies -- a smoking gun for quenching?
• Resolved star formation and molecular gas properties of green valley galaxies: a first look with ALMA and MaNGA
• EDGE-CALIFA survey: Self-regulation of Star formation at kpc scales
• The ALMaQUEST Survey: II. What drives central starbursts at z~0?
• What Drives Galaxy Quenching? Resolving Molecular Gas and Star Formation in the Green Valley
• The EDGE-CALIFA Survey: Exploring the Star Formation Law through Variable Selection
• The ALMaQUEST Survey: VI. The molecular gas main sequence of `retired' regions in galaxies
• Stellar age gradients and inside-out star formation quenching in galaxy bulges