Andromeda X, a New Dwarf Spheroidal Satellite of M31: Photometry | Zendy

D. B. Zucker | Zendy; A. Y. Kniazev | Zendy; David MartínezDelgado | Zendy; Eric F. Bell | Zendy; HansWalter Rix | Zendy; E. K. Grebel | Zendy; Jon A. Holtzman | Zendy; R. A. M. Walterbos | Zendy; Constance M. Rockosi | Zendy; Donald G. York | Zendy; John C. Barentine | Zendy; H. Brewington | Zendy; J. Brinkmann | Zendy; Michael Harvanek | Zendy; S. J. Kleinman | Zendy; J. Krzesiński | Zendy; Dan Long | Zendy; Eric H. Neilsen | Zendy; A. Nitta | Zendy; Stephanie A. Snedden | Zendy

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Andromeda X, a New Dwarf Spheroidal Satellite of M31: Photometry

Author(s) -

D. B. Zucker,

A. Y. Kniazev,

David MartínezDelgado,

Eric F. Bell,

HansWalter Rix,

E. K. Grebel,

Jon A. Holtzman,

R. A. M. Walterbos,

Constance M. Rockosi,

Donald G. York,

John C. Barentine,

H. Brewington,

J. Brinkmann,

Michael Harvanek,

S. J. Kleinman,

J. Krzesiński,

Dan Long,

Eric H. Neilsen,

A. Nitta,

Stephanie A. Snedden

Publication year - 2007

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/516748

Subject(s) - andromeda , photometry (optics) , physics , astrophysics , absolute magnitude , local group , astronomy , brightness , andromeda galaxy , sky , apparent magnitude , dwarf spheroidal galaxy , surface brightness , milky way , stars , dwarf galaxy , galaxy , interacting galaxy

We report the discovery of Andromeda X, a new dwarf spheroidal satellite ofM31, based on stellar photometry from the Sloan Digital Sky Survey (SDSS).Using follow-up imaging data we have estimated its distance and other physicalproperties. We find that Andromeda X has a dereddened central surfacebrightness of mu_V,0 ~ 26.7 mag arcsec^-2 and a total apparent magnitude ofV_tot ~ 16.1, which at the derived distance modulus, (m - M)_0 ~ 24.12 - 24.34,yields an absolute magnitude of M_V ~ -8.1 +/- 0.5; these values are quitecomparable to those of Andromeda IX, a previously-discovered low luminosity M31satellite. The discoveries of Andromeda IX and Andromeda X suggest that suchextremely faint satellites may be plentiful in the Local Group.Comment: 4 pages, 4 figures; submitted to Astrophysical Journal Letter

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