PERSEUS I: A DISTANT SATELLITE DWARF GALAXY OF ANDROMEDA

被引：40

作者：

Martin, Nicolas F. ^{[1
,2
]}

Schlafly, Edward F. ^{[2
]}

Slater, Colin T. ^{[3
]}

Bernard, Edouard J. ^{[4
]}

Rix, Hans-Walter ^{[2
]}

Bell, Eric F. ^{[3
]}

Ferguson, Annette M. N. ^{[4
]}

Finkbeiner, Douglas P. ^{[5
]}

Laevens, Benjamin P. M. ^{[1
,2
]}

Burgett, William S. ^{[6
]}

Chambers, Kenneth C. ^{[6
]}

Draper, Peter W. ^{[7
]}

Hodapp, Klaus W. ^{[6
]}

Kaiser, Nicholas ^{[6
]}

Kudritzki, Rolf-Peter ^{[6
]}

Magnier, Eugene A. ^{[6
]}

Metcalfe, Nigel ^{[7
]}

Morgan, Jeffrey S. ^{[6
]}

Price, Paul A. ^{[8
]}

Tonry, John L. ^{[6
]}

Wainscoat, Richard J. ^{[6
]}

Waters, Christopher ^{[6
]}

机构：

[1] Univ Strasbourg, CNRS, UMR 7550, Observ Astron Strasbourg, F-67000 Strasbourg, France

[2] Max Planck Inst Astron, D-69117 Heidelberg, Germany

[3] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[4] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[5] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[6] Univ Hawaii Manoa, Inst Astron, Honolulu, HI 96822 USA

[7] Univ Durham, Dept Phys, Durham DH1 3LE, England

[8] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2013年 / 779卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

galaxies: individual (Perseus I; Andromeda XXXIII); Local Group; MILKY-WAY; PAN-STARRS1; SURVEY; M31; CALIBRATION; VELOCITY; TIP;

D O I：

10.1088/2041-8205/779/1/L10

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the discovery of a new dwarf galaxy, Perseus I/ Andromeda XXXIII, found in the vicinity of Andromeda (M31) in stacked imaging data from the Pan-STARRS1 3p survey. Located 27 +/- 9 away from M31, Perseus I has a heliocentric distance of 785 +/- 65 kpc, compatible with it being a satellite of M31 at 374+ 14 -10 kpc from its host. The properties of Perseus I are typical for a reasonably bright dwarf galaxy (MV = -10.3 +/- 0.7), with an exponential halflight radius of r(h) = 1.7 +/- 0.4 arcmin or rh = 400+ 105 -85 pc at this distance, and a moderate ellipticity (mu = 0.43+ 0.15 -0.17). The late discovery of Perseus I is due to its fairly low surface brightness (mu(0) = 25.7+ 1.0 -0.9 mag arcsec-2), and to the previous lack of deep, high quality photometric data in this region. If confirmed to be a companion of M31, the location of Perseus I, far east from its host, could place interesting constraints on the bulk motion of the satellite system of M31.

引用

页数：5

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