The COS Legacy Archive Spectroscopy Survey (CLASSY) Treasury Atlas

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Berg, DA (Author) Other; James, BL (Author) Other; King, T (Author) Other; McDonald, M (Author) Other; Chen, ZY (Author) Other; Chisholm, J (Author) Other; Heckman, T (Author) Other; Martin, CL (Author) Other; Stark, DP (Author) Other; Aloisi, A (Author) Other; Amorin, RO (Author) Other; Arellano-Cordova, KZ (Author) Other; Bayliss, M (Author) Other; Bordoloi, R (Author) Other; J. Brinchmann (Author) FCUP; Charlot, S (Author) Other; Chevallard, J (Author) Other; Clark, I (Author) Other; Erb, DK (Author) Other; Feltre, A (Author) Other; Gronke, M (Author) Other; Hayes, M (Author) Other; Henry, A (Author) Other; Hernandez, S (Author) Other; Jaskot, A (Author) Other; Jones, T (Author) Other; Kewley, LJ (Author) Other; Kumari, N (Author) Other; Leitherer, C (Author) Other; Llerena, M (Author) Other; Maseda, M (Author) Other; Mingozzi, M (Author) Other; Nanayakkara, T (Author) Other; Ouchi, M (Author) Other; Plat, A (Author) Other; Pogge, RW (Author) Other; Ravindranath, S (Author) Other; Rigby, JR (Author) Other; Sanders, R (Author) Other; Scarlata, C (Author) Other; Senchyna, P (Author) Other; Skillman, ED (Author) Other; Steidel, CC (Author) Other; Strom, AL (Author) Other; Sugahara, Y (Author) Other; Wilkins, SM (Author) Other; Wofford, A (Author) Other; Xu, XF (Author) Other

Journal

Title: Astrophysical Journal, Supplement Series

Vol. 261

Final page: 31

ISSN: 0067-0049

Publisher: American Astronomical Society

Indexing

ISI Web of Knowledge - 27 Citations

Other information

Authenticus ID: P-00X-1J1

DOI: 10.3847/1538-4365/ac6c03

Abstract (EN): Far-ultraviolet (FUV; similar to 1200-2000 angstrom) spectra are fundamental to our understanding of star-forming galaxies, providing a unique window on massive stellar populations, chemical evolution, feedback processes, and reionization. The launch of the James Webb Space Telescope will soon usher in a new era, pushing the UV spectroscopic frontier to higher redshifts than ever before; however, its success hinges on a comprehensive understanding of the massive star populations and gas conditions that power the observed UV spectral features. This requires a level of detail that is only possible with a combination of ample wavelength coverage, signal-to-noise, spectral-resolution, and sample diversity that has not yet been achieved by any FUV spectral database. We present the Cosmic Origins Spectrograph Legacy Spectroscopic Survey (CLASSY) treasury and its first high-level science product, the CLASSY atlas. CLASSY builds on the Hubble Space Telescope (HST) archive to construct the first high-quality (S/N-1500 angstrom greater than or similar to 5/resel), high-resolution (R similar to 15,000) FUV spectral database of 45 nearby (0.002 < z < 0.182) star-forming galaxies. The CLASSY atlas, available to the public via the CLASSY website, is the result of optimally extracting and coadding 170 archival+new spectra from 312 orbits of HST observations. The CLASSY sample covers a broad range of properties including stellar mass (6.2 < log M-*(M (circle dot)) < 10.1), star formation rate (-2.0 < log SFR (M (circle dot) yr(-1)) < +1.6), direct gas-phase metallicity (7.0 < 12+log(O/H) < 8.8), ionization (0.5 < O-32 < 38.0), reddening (0.02 < E(B - V) < 0.67), and nebular density (10 < n (e) (cm(-3)) < 1120). CLASSY is biased to UV-bright star-forming galaxies, resulting in a sample that is consistent with the z similar to 0 mass-metallicity relationship, but is offset to higher star formation rates by roughly 2 dex, similar to z greater than or similar to 2 galaxies. This unique set of properties makes the CLASSY atlas the benchmark training set for star-forming galaxies across cosmic time.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 41