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A kinematic study of the Andromeda dwarf spheroidal system

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A kinematic study of the Andromeda dwarf spheroidal system. / Collins, Michelle L. M.; Chapman, Scott C.; Rich, R. Michael et al.
In: The Astrophysical Journal, Vol. 768, No. 2, 172, 26.04.2013.

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 2013, 'A kinematic study of the Andromeda dwarf spheroidal system', The Astrophysical Journal, vol. 768, no. 2, 172. https://doi.org/10.1088/0004-637X/768/2/172

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. (2013). A kinematic study of the Andromeda dwarf spheroidal system. The Astrophysical Journal, 768(2), Article 172. https://doi.org/10.1088/0004-637X/768/2/172

Vancouver

Collins MLM, Chapman SC, Rich RM, Ibata RA, Martin NF, Irwin MJ et al. A kinematic study of the Andromeda dwarf spheroidal system. The Astrophysical Journal. 2013 Apr 26;768(2):172. doi: 10.1088/0004-637X/768/2/172

Author

Collins, Michelle L. M. ; Chapman, Scott C. ; Rich, R. Michael et al. / A kinematic study of the Andromeda dwarf spheroidal system. In: The Astrophysical Journal. 2013 ; Vol. 768, No. 2.

Bibtex

@article{74e000b6ee6347bea49b89c91d356db5,
title = "A kinematic study of the Andromeda dwarf spheroidal system",
abstract = "We present a homogeneous kinematic analysis of red giant branch stars within 18 of the 28 Andromeda dwarf spheroidal (dSph) galaxies, obtained using the Keck I LRIS and Keck II DEIMOS spectrographs. Based on their g-i colors (taken with the CFHT MegaCam imager), physical positions on the sky, and radial velocities, we assign probabilities of dSph membership to each observed star. Using this information, the velocity dispersions, central masses and central densities of the dark matter halos are calculated for these objects, and compared with the properties of the Milky Way dSph population. We also measure the average metallicity ([Fe/H]) from the co-added spectra of member stars for each M31 dSph and find that they are consistent with the trend of decreasing [Fe/H] with luminosity observed in the Milky Way population. We find that three of our studied M31 dSphs appear as significant outliers in terms of their central velocity dispersion, And XIX, XXI and XXV, all of which have large half-light radii (>700 pc) 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. Michael} 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 = "41 pages, 23 figures. Accepted for publication in ApJ",
year = "2013",
month = apr,
day = "26",
doi = "10.1088/0004-637X/768/2/172",
language = "English",
volume = "768",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing",
number = "2",

}

RIS

TY - JOUR

T1 - A kinematic study of the Andromeda dwarf spheroidal system

AU - Collins, Michelle L. M.

AU - Chapman, Scott C.

AU - Rich, R. Michael

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 - 41 pages, 23 figures. Accepted for publication in ApJ

PY - 2013/4/26

Y1 - 2013/4/26

N2 - We present a homogeneous kinematic analysis of red giant branch stars within 18 of the 28 Andromeda dwarf spheroidal (dSph) galaxies, obtained using the Keck I LRIS and Keck II DEIMOS spectrographs. Based on their g-i colors (taken with the CFHT MegaCam imager), physical positions on the sky, and radial velocities, we assign probabilities of dSph membership to each observed star. Using this information, the velocity dispersions, central masses and central densities of the dark matter halos are calculated for these objects, and compared with the properties of the Milky Way dSph population. We also measure the average metallicity ([Fe/H]) from the co-added spectra of member stars for each M31 dSph and find that they are consistent with the trend of decreasing [Fe/H] with luminosity observed in the Milky Way population. We find that three of our studied M31 dSphs appear as significant outliers in terms of their central velocity dispersion, And XIX, XXI and XXV, all of which have large half-light radii (>700 pc) and low velocity dispersions (sigma_v

AB - We present a homogeneous kinematic analysis of red giant branch stars within 18 of the 28 Andromeda dwarf spheroidal (dSph) galaxies, obtained using the Keck I LRIS and Keck II DEIMOS spectrographs. Based on their g-i colors (taken with the CFHT MegaCam imager), physical positions on the sky, and radial velocities, we assign probabilities of dSph membership to each observed star. Using this information, the velocity dispersions, central masses and central densities of the dark matter halos are calculated for these objects, and compared with the properties of the Milky Way dSph population. We also measure the average metallicity ([Fe/H]) from the co-added spectra of member stars for each M31 dSph and find that they are consistent with the trend of decreasing [Fe/H] with luminosity observed in the Milky Way population. We find that three of our studied M31 dSphs appear as significant outliers in terms of their central velocity dispersion, And XIX, XXI and XXV, all of which have large half-light radii (>700 pc) and low velocity dispersions (sigma_v

KW - astro-ph.CO

KW - astro-ph.GA

U2 - 10.1088/0004-637X/768/2/172

DO - 10.1088/0004-637X/768/2/172

M3 - Journal article

VL - 768

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 172

ER -