1. SDSS-IV MaStar: A Large and Comprehensive Empirical Stellar Spectral Library-First Release
- Author
-
Yan, R, Chen, Y, Lazarz, D, Bizyaev, D, Maraston, C, Stringfellow, GS, Mccarthy, K, Meneses-Goytia, S, Law, DR, Thomas, D, Barroso, JF, Sánchez-Gallego, JR, Schlafly, E, Zheng, Z, Argudo-Fernández, M, Beaton, RL, Beers, TC, Bershady, M, Blanton, MR, Brownstein, J, Bundy, K, Chambers, KC, Cherinka, B, Lee, ND, Drory, N, Galbany, L, Holtzman, J, Imig, J, Kaiser, N, Kinemuchi, K, Liu, C, Luo, AL, Magnier, E, Majewski, S, Nair, P, Oravetz, A, Oravetz, D, Pan, K, Sobeck, J, Stassun, K, Talbot, M, Tremonti, C, Waters, C, Weijmans, AM, Wilhelm, R, Zasowski, G, Zhao, G, and Zhao, YH
- Subjects
catalogs ,Galaxy: stellar content ,stars: fundamental parameters ,stars: general ,techniques: spectroscopic ,astro-ph.IM ,astro-ph.GA ,astro-ph.SR ,Astronomy & Astrophysics ,Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Physical Chemistry (incl. Structural) - Abstract
We present the first release of the MaNGA Stellar Library (MaStar), which is a large, well-calibrated, high-quality empirical library covering the wavelength range 3622-10354 Å at a resolving power of R ∼ 1800. The spectra were obtained using the same instrument as used by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) project, by piggybacking on the Sloan Digital Sky Survey (SDSS-IV)/Apache Point Observatory Galaxy Evolution Experiment 2-N (APOGEE-2N) observations. Compared to previous empirical libraries, the MaStar library will have a higher number of stars and a more comprehensive stellar-parameter coverage, especially of cool dwarfs, low-metallicity stars, and stars with different [α/Fe], achieved by a sophisticated target-selection strategy that takes advantage of stellar-parameter catalogs from the literature. This empirical library will provide a new basis for stellar-population synthesis and is particularly well suited for stellar-population analysis of MaNGA galaxies. The first version of the library contains 8646 high-quality per-visit spectra for 3321 unique stars. Compared to photometry, the relative flux calibration of the library is accurate to 3.9% in g-r, 2.7% in r-i, and 2.2% in i-z. The data are released as part of SDSS Data Release 15. We expect the final release of the library to contain more than 10,000 stars.
- Published
- 2019