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Astrophysics and Astronomy

University of Kentucky

Series

2017

Kinematics and dynamics

Articles 1 - 2 of 2

Full-Text Articles in Physics

Sdss-Iv Manga: Probing The Kinematic Morphology–Density Relation Of Early-Type Galaxies With Manga, J. E. Greene, A. Leauthaud, E. Emsellem, D. Goddard, J. Ge, B. H. Andrews, J. Brinkman, J. R. Brownstein, J. Greco, D. Law, Y. -T. Lin, K. L. Masters, M. Merrifield, S. More, N. Okabe, D. P. Schneider, D. Thomas, D. A. Wake, Renbin Yan, N. Drory Dec 2017

Sdss-Iv Manga: Probing The Kinematic Morphology–Density Relation Of Early-Type Galaxies With Manga, J. E. Greene, A. Leauthaud, E. Emsellem, D. Goddard, J. Ge, B. H. Andrews, J. Brinkman, J. R. Brownstein, J. Greco, D. Law, Y. -T. Lin, K. L. Masters, M. Merrifield, S. More, N. Okabe, D. P. Schneider, D. Thomas, D. A. Wake, Renbin Yan, N. Drory

Physics and Astronomy Faculty Publications

The "kinematic" morphology–density relation for early-type galaxies posits that those galaxies with low angular momentum are preferentially found in the highest-density regions of the universe. We use a large sample of galaxy groups with halo masses 1012.5 < Mhalo < 1014.5 h-1 M observed with the Mapping Nearby Galaxies at APO (MaNGA) survey to examine whether there is a correlation between local environment and rotational support that is independent of stellar mass. We find no compelling evidence for a relationship between the angular momentum content of early-type galaxies and either local overdensity or radial position within the group …


Evolution Of Galactic Outflows At Z ~ 0–2 Revealed With Sdss, Deep2, And Keck Spectra, Yuma Sugahara, Masami Ouchi, Lihwai Lin, Crystal L. Martin, Yoshiaki Ono, Yuichi Harikane, Takatoshi Shibuya, Renbin Yan Nov 2017

Evolution Of Galactic Outflows At Z ~ 0–2 Revealed With Sdss, Deep2, And Keck Spectra, Yuma Sugahara, Masami Ouchi, Lihwai Lin, Crystal L. Martin, Yoshiaki Ono, Yuichi Harikane, Takatoshi Shibuya, Renbin Yan

Physics and Astronomy Faculty Publications

We conduct a systematic study of galactic outflows in star-forming galaxies at z ~ 0–2 based on the absorption lines of optical spectra taken from SDSS DR7, DEEP2 DR4, and Keck (Erb et al.). We carefully make stacked spectra of homogeneous galaxy samples with similar stellar mass distributions at z ~ 0–2 and perform the multicomponent fitting of model absorption lines and stellar continua to the stacked spectra. We obtain the maximum (vmax) and central (vout) outflow velocities and estimate the mass loading factors (η), a ratio of the mass outflow rate …