| Type |
Journal Article |
| Names |
Kevin Bundy, Matthew A. Bershady, David R. Law, Renbin Yan, Niv Drory, Nicholas MacDonald, David A. Wake, Brian Cherinka, José R. Sánchez-Gallego, Anne-Marie Weijmans, Daniel Thomas, Christy Tremonti, Karen Masters, Lodovico Coccato, Aleksandar M. Di |
| Publication |
The Astrophysical Journal |
| Volume |
798 |
| Issue |
1 |
| Pages |
7 |
| Journal Abbreviation |
The Astrophysical Journal |
| Date |
January 1, 2015 |
| DOI |
10.1088/0004-637X/798/1/7 |
| ISSN |
0004-637X |
| Short Title |
Overview of the SDSS-IV MaNGA Survey |
| URL |
http://adsabs.org/2015ApJ.798.7B |
| Library Catalog |
adslabs.org |
| Abstract |
We present an overview of a new integral field spectroscopic survey
called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one
of three core programs in the fourth-generation Sloan Digital Sky Survey
(SDSS-IV) that began on 2014 July 1. MaNGA will investigate the internal
kinematic structure and composition of gas and stars in an unprecedented
sample of 10,000 nearby galaxies. We summarize essential characteristics
of the instrument and survey design in the context of MaNGA's key
science goals and present prototype observations to demonstrate MaNGA's
scientific potential. MaNGA employs dithered observations with 17
fiber-bundle integral field units that vary in diameter from 12'' (19
fibers) to 32'' (127 fibers). Two dual-channel spectrographs provide
simultaneous wavelength coverage over 3600-10300 Å at R ~ 2000.
With a typical integration time of 3 hr, MaNGA reaches a target r-band
signal-to-noise ratio of 4-8 (Å–1 per 2'' fiber)
at 23 AB mag arcsec–2, which is typical for the
outskirts of MaNGA galaxies. Targets are selected with M *
>~ 109 M ☉ using SDSS-I redshifts and
i-band luminosity to achieve uniform radial coverage in terms of the
effective radius, an approximately flat distribution in stellar mass,
and a sample spanning a wide range of environments. Analysis of our
prototype observations demonstrates MaNGA's ability to probe gas
ionization, shed light on recent star formation and quenching, enable
dynamical modeling, decompose constituent components, and map the
composition of stellar populations. MaNGA's spatially resolved spectra
will enable an unprecedented study of the astrophysics of nearby
galaxies in the coming 6 yr. |
| Tags |
GALAXIES: EVOLUTION, Galaxies: General, surveys, techniques: imaging spectroscopy |