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SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies

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SDSS-IV MaNGA : variation of the stellar initial mass function in spiral and early-type galaxies. / Li, Hongyu; Ge, Junqiang; Mao, Shude; Cappellari, Michele; Long, R. J.; Li, Ran; Emsellem, Eric; Dutton, Aaron A.; Li, Cheng; Bundy, Kevin; Thomas, Daniel; Drory, Niv; Lopes, Alexandre Roman.

In: The Astrophysical Journal, Vol. 838, No. 2, 77, 01.04.2017.

Research output: Contribution to journalArticle

Harvard

Li, H, Ge, J, Mao, S, Cappellari, M, Long, RJ, Li, R, Emsellem, E, Dutton, AA, Li, C, Bundy, K, Thomas, D, Drory, N & Lopes, AR 2017, 'SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies', The Astrophysical Journal, vol. 838, no. 2, 77. https://doi.org/10.3847/1538-4357/aa662a

APA

Li, H., Ge, J., Mao, S., Cappellari, M., Long, R. J., Li, R., Emsellem, E., Dutton, A. A., Li, C., Bundy, K., Thomas, D., Drory, N., & Lopes, A. R. (2017). SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies. The Astrophysical Journal, 838(2), [77]. https://doi.org/10.3847/1538-4357/aa662a

Vancouver

Li H, Ge J, Mao S, Cappellari M, Long RJ, Li R et al. SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies. The Astrophysical Journal. 2017 Apr 1;838(2). 77. https://doi.org/10.3847/1538-4357/aa662a

Author

Li, Hongyu ; Ge, Junqiang ; Mao, Shude ; Cappellari, Michele ; Long, R. J. ; Li, Ran ; Emsellem, Eric ; Dutton, Aaron A. ; Li, Cheng ; Bundy, Kevin ; Thomas, Daniel ; Drory, Niv ; Lopes, Alexandre Roman. / SDSS-IV MaNGA : variation of the stellar initial mass function in spiral and early-type galaxies. In: The Astrophysical Journal. 2017 ; Vol. 838, No. 2.

Bibtex

@article{0c28141a0f544e49908853795f4e3a37,
title = "SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies",
abstract = "We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies from the MaNGA DR13 sample. By comparing the stellar mass-to-light ratios estimated from stellar population synthesis and from JAM, we find a systematic variation of the initial mass function (IMF) similar to that in the earlier ATLAS3D results. Early-type galaxies (elliptical and lenticular) with lower velocity dispersions within one effective radius are consistent with a Chabrier-like IMF, while galaxies with higher velocity dispersions are consistent with a more bottom-heavy IMF such as the Salpeter IMF. Spiral galaxies have similar systematic IMF variations, but with slightly different slopes and larger scatters, due to the uncertainties caused by the higher gas fractions and extinctions for these galaxies. Furthermore, we examine the effects of stellar mass-to-light ratio gradients on our JAM modeling, and we find that the trends become stronger after considering the gradients.",
keywords = "astro-ph.GA, uploaded-in-3-months-elsewhere",
author = "Hongyu Li and Junqiang Ge and Shude Mao and Michele Cappellari and Long, {R. J.} and Ran Li and Eric Emsellem and Dutton, {Aaron A.} and Cheng Li and Kevin Bundy and Daniel Thomas and Niv Drory and Lopes, {Alexandre Roman}",
year = "2017",
month = apr,
day = "1",
doi = "10.3847/1538-4357/aa662a",
language = "English",
volume = "838",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - SDSS-IV MaNGA

T2 - variation of the stellar initial mass function in spiral and early-type galaxies

AU - Li, Hongyu

AU - Ge, Junqiang

AU - Mao, Shude

AU - Cappellari, Michele

AU - Long, R. J.

AU - Li, Ran

AU - Emsellem, Eric

AU - Dutton, Aaron A.

AU - Li, Cheng

AU - Bundy, Kevin

AU - Thomas, Daniel

AU - Drory, Niv

AU - Lopes, Alexandre Roman

PY - 2017/4/1

Y1 - 2017/4/1

N2 - We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies from the MaNGA DR13 sample. By comparing the stellar mass-to-light ratios estimated from stellar population synthesis and from JAM, we find a systematic variation of the initial mass function (IMF) similar to that in the earlier ATLAS3D results. Early-type galaxies (elliptical and lenticular) with lower velocity dispersions within one effective radius are consistent with a Chabrier-like IMF, while galaxies with higher velocity dispersions are consistent with a more bottom-heavy IMF such as the Salpeter IMF. Spiral galaxies have similar systematic IMF variations, but with slightly different slopes and larger scatters, due to the uncertainties caused by the higher gas fractions and extinctions for these galaxies. Furthermore, we examine the effects of stellar mass-to-light ratio gradients on our JAM modeling, and we find that the trends become stronger after considering the gradients.

AB - We perform Jeans anisotropic modeling (JAM) on elliptical and spiral galaxies from the MaNGA DR13 sample. By comparing the stellar mass-to-light ratios estimated from stellar population synthesis and from JAM, we find a systematic variation of the initial mass function (IMF) similar to that in the earlier ATLAS3D results. Early-type galaxies (elliptical and lenticular) with lower velocity dispersions within one effective radius are consistent with a Chabrier-like IMF, while galaxies with higher velocity dispersions are consistent with a more bottom-heavy IMF such as the Salpeter IMF. Spiral galaxies have similar systematic IMF variations, but with slightly different slopes and larger scatters, due to the uncertainties caused by the higher gas fractions and extinctions for these galaxies. Furthermore, we examine the effects of stellar mass-to-light ratio gradients on our JAM modeling, and we find that the trends become stronger after considering the gradients.

KW - astro-ph.GA

KW - uploaded-in-3-months-elsewhere

UR - https://ora.ox.ac.uk/objects/uuid:15cbdf0f-6466-4567-9241-6a4663727a78

U2 - 10.3847/1538-4357/aa662a

DO - 10.3847/1538-4357/aa662a

M3 - Article

VL - 838

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 77

ER -

ID: 7504012