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The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile

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The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile. / Collins, Michelle L. M.; Chapman, Scott C.; Rich, R. M. et al.
In: The Astrophysical Journal, Vol. 783, No. 1, 7, 06.02.2014.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Collins, MLM, Chapman, SC, Rich, RM, Ibata, RA, Martin, NF, Irwin, MJ, Bate, NF, Lewis, GF, Peñarrubia, J, Arimoto, N, Casey, CM, Ferguson, AMN, Koch, A, McConnachie, AW & Tanvir, N 2014, 'The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile', The Astrophysical Journal, vol. 783, no. 1, 7. https://doi.org/10.1088/0004-637X/783/1/7

APA

Collins, M. L. M., Chapman, S. C., Rich, R. M., Ibata, R. A., Martin, N. F., Irwin, M. J., Bate, N. F., Lewis, G. F., Peñarrubia, J., Arimoto, N., Casey, C. M., Ferguson, A. M. N., Koch, A., McConnachie, A. W., & Tanvir, N. (2014). The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile. The Astrophysical Journal, 783(1), Article 7. https://doi.org/10.1088/0004-637X/783/1/7

Vancouver

Collins MLM, Chapman SC, Rich RM, Ibata RA, Martin NF, Irwin MJ et al. The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile. The Astrophysical Journal. 2014 Feb 6;783(1):7. doi: 10.1088/0004-637X/783/1/7

Author

Collins, Michelle L. M. ; Chapman, Scott C. ; Rich, R. M. et al. / The masses of local group dwarf spheroidal galaxies : the death of the universal mass profile. In: The Astrophysical Journal. 2014 ; Vol. 783, No. 1.

Bibtex

@article{751f32f4c6794e87a63469bf229f9a5e,
title = "The masses of local group dwarf spheroidal galaxies: the death of the universal mass profile",
abstract = "We investigate the claim that all dwarf spheroidal galaxies (dSphs) reside within halos that share a common, universal mass profile as has been derived for dSphs of the Galaxy. By folding in kinematic information for 25 Andromeda dSphs, more than doubling the previous sample size, we find that a singular mass profile can not be found to fit all the observations well. Further, the best-fit dark matter density profile measured for solely the Milky Way dSphs is marginally discrepant (at just beyond the 1 sigma level) with that of the Andromeda dSphs, where a profile with lower maximum circular velocity, and hence mass, is preferred. The agreement is significantly better when three extreme Andromeda outliers, And XIX, XXI and XXV, all of which have large half-light radii (>600pc) and low velocity dispersions (sigma_v",
keywords = "astro-ph.CO, astro-ph.GA",
author = "Collins, {Michelle L. M.} and Chapman, {Scott C.} and Rich, {R. M.} and Ibata, {Rodrigo A.} and Martin, {Nicolas F.} and Irwin, {Michael J.} and Bate, {Nicholas F.} and Lewis, {Geraint F.} and Jorge Pe{\~n}arrubia and Nobuo Arimoto and Casey, {Caitlin M.} and Ferguson, {Annette M. N.} and Andreas Koch and McConnachie, {Alan W.} and Nial Tanvir",
note = "ApJ in press, 16 pages, 7 figures. Updated to address referee comments",
year = "2014",
month = feb,
day = "6",
doi = "10.1088/0004-637X/783/1/7",
language = "English",
volume = "783",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - The masses of local group dwarf spheroidal galaxies

T2 - the death of the universal mass profile

AU - Collins, Michelle L. M.

AU - Chapman, Scott C.

AU - Rich, R. M.

AU - Ibata, Rodrigo A.

AU - Martin, Nicolas F.

AU - Irwin, Michael J.

AU - Bate, Nicholas F.

AU - Lewis, Geraint F.

AU - Peñarrubia, Jorge

AU - Arimoto, Nobuo

AU - Casey, Caitlin M.

AU - Ferguson, Annette M. N.

AU - Koch, Andreas

AU - McConnachie, Alan W.

AU - Tanvir, Nial

N1 - ApJ in press, 16 pages, 7 figures. Updated to address referee comments

PY - 2014/2/6

Y1 - 2014/2/6

N2 - We investigate the claim that all dwarf spheroidal galaxies (dSphs) reside within halos that share a common, universal mass profile as has been derived for dSphs of the Galaxy. By folding in kinematic information for 25 Andromeda dSphs, more than doubling the previous sample size, we find that a singular mass profile can not be found to fit all the observations well. Further, the best-fit dark matter density profile measured for solely the Milky Way dSphs is marginally discrepant (at just beyond the 1 sigma level) with that of the Andromeda dSphs, where a profile with lower maximum circular velocity, and hence mass, is preferred. The agreement is significantly better when three extreme Andromeda outliers, And XIX, XXI and XXV, all of which have large half-light radii (>600pc) and low velocity dispersions (sigma_v

AB - We investigate the claim that all dwarf spheroidal galaxies (dSphs) reside within halos that share a common, universal mass profile as has been derived for dSphs of the Galaxy. By folding in kinematic information for 25 Andromeda dSphs, more than doubling the previous sample size, we find that a singular mass profile can not be found to fit all the observations well. Further, the best-fit dark matter density profile measured for solely the Milky Way dSphs is marginally discrepant (at just beyond the 1 sigma level) with that of the Andromeda dSphs, where a profile with lower maximum circular velocity, and hence mass, is preferred. The agreement is significantly better when three extreme Andromeda outliers, And XIX, XXI and XXV, all of which have large half-light radii (>600pc) and low velocity dispersions (sigma_v

KW - astro-ph.CO

KW - astro-ph.GA

U2 - 10.1088/0004-637X/783/1/7

DO - 10.1088/0004-637X/783/1/7

M3 - Journal article

VL - 783

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 1

M1 - 7

ER -