Siena Galaxy Atlas 2020

IF 8.6 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Astrophysical Journal Supplement Series Pub Date : 2023-10-18 DOI:10.3847/1538-4365/acfaa2

John Moustakas, Dustin Lang, Arjun Dey, Stéphanie Juneau, Aaron Meisner, Adam D. Myers, Edward F. Schlafly, David J. Schlegel, Francisco Valdes, Benjamin A. Weaver, Rongpu Zhou

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引用次数: 1

Abstract

Abstract We present the 2020 version of the Siena Galaxy Atlas (SGA-2020), a multiwavelength optical and infrared imaging atlas of 383,620 nearby galaxies. The SGA-2020 uses optical grz imaging over ≈20,000 deg 2 from the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys Data Release 9 and infrared imaging in four bands (spanning 3.4–22 μ m) from the 6 year unWISE coadds; it is more than 95% complete for galaxies larger than R (26) ≈ 25″ and r < 18 measured at the 26 mag arcsec −2 isophote in the r band. The atlas delivers precise coordinates, multiwavelength mosaics, azimuthally averaged optical surface-brightness profiles, model images and photometry, and additional ancillary metadata for the full sample. Coupled with existing and forthcoming optical spectroscopy from the DESI, the SGA-2020 will facilitate new detailed studies of the star formation and mass assembly histories of nearby galaxies; enable precise measurements of the local velocity field via the Tully–Fisher and fundamental plane relations; serve as a reference sample of lasting legacy value for time-domain and multimessenger astronomical events; and more.

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2020年锡耶纳银河地图集

我们展示了2020年版的锡耶纳星系地图集(SGA-2020)，这是一个383,620个附近星系的多波长光学和红外成像地图集。SGA-2020使用来自暗能量光谱仪器(DESI)遗留成像调查数据发布9的超过≈20,000°2的光学grz成像和来自6年wise cods的四个波段(跨越3.4-22 μ m)的红外成像;大于R(26)≈25″和R <的星系95%以上是完整的;18在26等arcsec−2的r波段测得。该地图集提供精确的坐标、多波长马赛克、方位平均光学表面亮度剖面、模型图像和光度测定，以及完整样本的附加辅助元数据。再加上DESI现有的和即将到来的光学光谱，SGA-2020将有助于对附近星系的恒星形成和质量组装历史进行新的详细研究;通过Tully-Fisher和基本平面关系，可以精确测量局部速度场;为时域和多信使天文事件提供具有持久遗产价值的参考样本;和更多。

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来源期刊

Astrophysical Journal Supplement Series 地学天文-天文与天体物理

CiteScore

14.50

自引率

5.70%

发文量

264

审稿时长

2 months

期刊介绍： The Astrophysical Journal Supplement (ApJS) serves as an open-access journal that publishes significant articles featuring extensive data or calculations in the field of astrophysics. It also facilitates Special Issues, presenting thematically related papers simultaneously in a single volume.