https://scholars.lib.ntu.edu.tw/handle/123456789/624904
標題: | The Fundamental Plane in the LEGA-C Survey: Unraveling the M/L Ratio Variations of Massive Star-forming and Quiescent Galaxies at z ∼ 0.8 | 作者: | De Graaff A Bezanson R Franx M Van Der Wel A Holden B Van De Sande J Bell E.F D'Eugenio F Maseda M.V Muzzin A Sobral D Straatman C.M.S Wu P.-F. PO-FENG WU |
公開日期: | 2021 | 卷: | 913 | 期: | 2 | 來源出版物: | Astrophysical Journal | 摘要: | We explore the connection between the kinematics, structures and stellar populations of massive galaxies at 0.6 < z < 1.0 using the fundamental plane (FP). Combining stellar kinematic data from the Large Early Galaxy Astrophysics Census (LEGA-C) survey with structural parameters measured from deep Hubble Space Telescope imaging, we obtain a sample of 1419 massive () galaxies that span a wide range in morphology, star formation activity, and environment, and therefore is representative of the massive galaxy population at z ∼ 0.8. We find that quiescent and star-forming galaxies occupy the parameter space of the g-band FP differently and thus have different distributions in the dynamical mass-to-light ratio (M dyn/L g ), largely owing to differences in the stellar age and recent star formation history, and to a lesser extent, the effects of dust attenuation. In contrast, we show that both star-forming and quiescent galaxies lie on the same mass FP at z ∼ 0.8, with a comparable level of intrinsic scatter about the plane. We examine the variation in M dyn/M ∗ through the thickness of the mass FP, finding no significant residual correlations with stellar population properties, Sérsic index, or galaxy overdensity. Our results suggest that, at fixed size and velocity dispersion, the variations in M dyn/L g of massive galaxies reflect an approximately equal contribution of variations in M ∗/L g , and variations in the dark matter fraction or initial mass function. © 2021. The American Astronomical Society. All rights reserved.. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85107586969&doi=10.3847%2f1538-4357%2fabf1e7&partnerID=40&md5=28d967080863bf163c97983273cda95e https://scholars.lib.ntu.edu.tw/handle/123456789/624904 |
ISSN: | 0004637X | DOI: | 10.3847/1538-4357/abf1e7 |
顯示於: | 天文物理研究所 |
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