SDSS-IV MaNGA: a distinct mass distribution explored in slow-rotating early-type galaxies

Rong, Yu; Li, Hongyu; Wang, Jie; Gao, Liang; Li, Ran; Ge, Junqiang; Jing, Yingjie; Pan, Jun; Fernández-Trincado, J.G.; Valenzuela, Octavio; Ortíz, Erik Aquino

doi:10.1093/mnras/sty697

SDSS-IV MaNGA: a distinct mass distribution explored in slow-rotating early-type galaxies

Rong, Yu; Li, Hongyu; Wang, Jie; Gao, Liang; Li, Ran; Ge, Junqiang; Jing, Yingjie; Pan, Jun; Fernández-Trincado, J.G.; Valenzuela, Octavio; Ortíz, Erik Aquino

Authors

Yu Rong

Hongyu Li

Jie Wang

Liang Gao

Ran Li

Junqiang Ge

Yingjie Jing

Jun Pan

J.G. Fernández-Trincado

Octavio Valenzuela

Erik Aquino Ortíz

Abstract

We study the radial acceleration relation (RAR) for early-type galaxies (ETGs) in the SDSS MaNGA MPL5 data set. The complete ETG sample show a slightly offset RAR from the relation reported by McGaugh et al. (2016) at the low-acceleration end; we find that the deviation is due to the fact that the slow rotators show a systematically higher acceleration relation than the McGaugh's RAR, while the fast rotators show a consistent acceleration relation to McGaugh's RAR. There is a 1σ significant difference between the acceleration relations of the fast and slow rotators, suggesting that the acceleration relation correlates with the galactic spins, and that the slow rotators may have a different mass distribution compared with fast rotators and late-type galaxies. We suspect that the acceleration relation deviation of slow rotators may be attributed to more galaxy merger events, which would disrupt the original spins and correlated distributions of baryons and dark matter orbits in galaxies.

Citation

Rong, Y., Li, H., Wang, J., Gao, L., Li, R., Ge, J., …Ortíz, E. A. (2018). SDSS-IV MaNGA: a distinct mass distribution explored in slow-rotating early-type galaxies. Monthly Notices of the Royal Astronomical Society, 477(1), 230-235. https://doi.org/10.1093/mnras/sty697

Journal Article Type	Article
Acceptance Date	Feb 26, 2018
Online Publication Date	Mar 15, 2018
Publication Date	Jun 11, 2018
Deposit Date	May 24, 2018
Publicly Available Date	May 24, 2018
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	477
Issue	1
Pages	230-235
DOI	https://doi.org/10.1093/mnras/sty697

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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.