Journal article
MaNGA DynPop – III. Stellar dynamics vs. stellar population relations in 6000 early-type and spiral galaxies: fundamental plane, mass-to-light ratios, total density slopes, and dark matter fractions
- Abstract:
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We present dynamical scaling relations, combined with the stellar population properties, for a subsample of about 6000 nearby
galaxies with the most reliable dynamical models extracted from the full Mapping Nearby Galaxies at Apache Point Observatory
(MaNGA) sample of 10 000 galaxies. We show that the inclination-corrected mass plane for both early-type galaxies (ETGs) and
late-type galaxies (LTGs), which links dynamical mass, projected half-light radius Re, and the second stellar velocity moment
σe within Re, satisfies the virial theorem and is even tighter than the uncorrected one. We find a clear parabolic relation between
lg(M/L)e, the total mass-to-light ratio (M/L) within a sphere of radius Re, and lg σe, with the M/L increasing with σe and
for older stellar populations. However, the relation for ETGs is linear and the one for the youngest galaxies is constant. We
confirm and improve the relation between mass-weighted total density slopes γT and σe: γT become steeper with increasing
σe until lg(σe/km s−1) ≈ 2.2 and then remain constant around γT ≈ 2.2. The γT –σe variation is larger for LTGs than ETGs. At
fixed σe the total density profiles steepen with galaxy age and for ETGs. We find generally low dark matter fractions, median
fDM(
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 23.9MB, Terms of use)
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- Publisher copy:
- 10.1093/mnras/stad3213
Authors
- Publisher:
- Oxford University Press
- Journal:
- Monthly Notices of the Royal Astronomical Society More from this journal
- Volume:
- 527
- Issue:
- 1
- Pages:
- 706–730
- Publication date:
- 2023-10-21
- Acceptance date:
- 2023-10-17
- DOI:
- EISSN:
-
1365-2966
- ISSN:
-
0035-8711
- Language:
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English
- Keywords:
- Pubs id:
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1560524
- Local pid:
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pubs:1560524
- Deposit date:
-
2023-11-24
Terms of use
- Copyright holder:
- Zhu et al
- Copyright date:
- 2023
- Rights statement:
- © The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
- Licence:
- CC Attribution (CC BY)
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