Cats and dogs, hair and a hero

A quintet of new milky way companions

V. Belokurov, D. B. Zucker, N. W. Evans, J. T. Kleyna, S. Koposov, S. T. Hodgkin, M. J. Irwin, G. Gilmore, M. I. Wilkinson, M. Fellhauer, D. M. Bramich, P. C. Hewett, S. Vidrih, J. T A De Jong, J. A. Smith, H. W. Rix, E. F. Bell, R. F G Wyse, H. J. Newberg, P. A. Mayeur & 14 others B. Yanny, C. M. Rockosi, O. Y. Gnedin, D. P. Schneider, T. C. Beers, J. C. Barentine, H. Brewington, J. Brinkmann, M. Harvanek, S. J. Kleinman, J. Krzesinski, D. Long, A. Nitta, S. A. Snedden

Research output: Contribution to journalArticle

528 Citations (Scopus)

Abstract

We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed up with either the Subaru or the Isaac Newton Telescopes. They include four probable new dwarf galaxies - one each in the constellations of Coma Berenices, Canes Venatici, Leo, and Hercules - together with one unusually extended globular cluster, Segue 1. We provide distances, absolute magnitudes, half-light radii, and colormagnitude diagrams for all five satellites. The morphological features of the color-magnitude diagrams are generally well described by the ridge line of the old, metal-poor globular cluster M92. In the past two years, a total of 10 new Milky Way satellites with effective surface brightness μv ≳ 28 mag arcsec-2 have been discovered in SDSS data. They are less luminous, more irregular, and apparently more metal-poor than the previously known nine Milky Way dwarf spheroidals. The relationship between these objects and other populations is discussed. We note that there is a paucity of objects with half-light radii between ∼40 and ∼100 pc. We conjecture that this may represent the division between star clusters and dwarf galaxies.

Original languageEnglish
Pages (from-to)897-906
Number of pages10
JournalAstrophysical Journal
Volume654
Issue number2 I
DOIs
Publication statusPublished - 10 Jan 2007
Externally publishedYes

Fingerprint

dogs
cats
hair
dwarf galaxies
globular clusters
diagram
radii
constellations
color-magnitude diagram
metal
coma
star clusters
metals
newton
division
ridges
brightness
diagrams
telescopes
galaxies

Keywords

  • Galaxies: dwarf
  • Local group

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Belokurov, V., Zucker, D. B., Evans, N. W., Kleyna, J. T., Koposov, S., Hodgkin, S. T., ... Snedden, S. A. (2007). Cats and dogs, hair and a hero: A quintet of new milky way companions. Astrophysical Journal, 654(2 I), 897-906. https://doi.org/10.1086/509718

Cats and dogs, hair and a hero : A quintet of new milky way companions. / Belokurov, V.; Zucker, D. B.; Evans, N. W.; Kleyna, J. T.; Koposov, S.; Hodgkin, S. T.; Irwin, M. J.; Gilmore, G.; Wilkinson, M. I.; Fellhauer, M.; Bramich, D. M.; Hewett, P. C.; Vidrih, S.; De Jong, J. T A; Smith, J. A.; Rix, H. W.; Bell, E. F.; Wyse, R. F G; Newberg, H. J.; Mayeur, P. A.; Yanny, B.; Rockosi, C. M.; Gnedin, O. Y.; Schneider, D. P.; Beers, T. C.; Barentine, J. C.; Brewington, H.; Brinkmann, J.; Harvanek, M.; Kleinman, S. J.; Krzesinski, J.; Long, D.; Nitta, A.; Snedden, S. A.

In: Astrophysical Journal, Vol. 654, No. 2 I, 10.01.2007, p. 897-906.

Research output: Contribution to journalArticle

Belokurov, V, Zucker, DB, Evans, NW, Kleyna, JT, Koposov, S, Hodgkin, ST, Irwin, MJ, Gilmore, G, Wilkinson, MI, Fellhauer, M, Bramich, DM, Hewett, PC, Vidrih, S, De Jong, JTA, Smith, JA, Rix, HW, Bell, EF, Wyse, RFG, Newberg, HJ, Mayeur, PA, Yanny, B, Rockosi, CM, Gnedin, OY, Schneider, DP, Beers, TC, Barentine, JC, Brewington, H, Brinkmann, J, Harvanek, M, Kleinman, SJ, Krzesinski, J, Long, D, Nitta, A & Snedden, SA 2007, 'Cats and dogs, hair and a hero: A quintet of new milky way companions', Astrophysical Journal, vol. 654, no. 2 I, pp. 897-906. https://doi.org/10.1086/509718
Belokurov V, Zucker DB, Evans NW, Kleyna JT, Koposov S, Hodgkin ST et al. Cats and dogs, hair and a hero: A quintet of new milky way companions. Astrophysical Journal. 2007 Jan 10;654(2 I):897-906. https://doi.org/10.1086/509718
Belokurov, V. ; Zucker, D. B. ; Evans, N. W. ; Kleyna, J. T. ; Koposov, S. ; Hodgkin, S. T. ; Irwin, M. J. ; Gilmore, G. ; Wilkinson, M. I. ; Fellhauer, M. ; Bramich, D. M. ; Hewett, P. C. ; Vidrih, S. ; De Jong, J. T A ; Smith, J. A. ; Rix, H. W. ; Bell, E. F. ; Wyse, R. F G ; Newberg, H. J. ; Mayeur, P. A. ; Yanny, B. ; Rockosi, C. M. ; Gnedin, O. Y. ; Schneider, D. P. ; Beers, T. C. ; Barentine, J. C. ; Brewington, H. ; Brinkmann, J. ; Harvanek, M. ; Kleinman, S. J. ; Krzesinski, J. ; Long, D. ; Nitta, A. ; Snedden, S. A. / Cats and dogs, hair and a hero : A quintet of new milky way companions. In: Astrophysical Journal. 2007 ; Vol. 654, No. 2 I. pp. 897-906.
@article{addabb3bcd5045f18896e27dbeb2c58b,
title = "Cats and dogs, hair and a hero: A quintet of new milky way companions",
abstract = "We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed up with either the Subaru or the Isaac Newton Telescopes. They include four probable new dwarf galaxies - one each in the constellations of Coma Berenices, Canes Venatici, Leo, and Hercules - together with one unusually extended globular cluster, Segue 1. We provide distances, absolute magnitudes, half-light radii, and colormagnitude diagrams for all five satellites. The morphological features of the color-magnitude diagrams are generally well described by the ridge line of the old, metal-poor globular cluster M92. In the past two years, a total of 10 new Milky Way satellites with effective surface brightness μv ≳ 28 mag arcsec-2 have been discovered in SDSS data. They are less luminous, more irregular, and apparently more metal-poor than the previously known nine Milky Way dwarf spheroidals. The relationship between these objects and other populations is discussed. We note that there is a paucity of objects with half-light radii between ∼40 and ∼100 pc. We conjecture that this may represent the division between star clusters and dwarf galaxies.",
keywords = "Galaxies: dwarf, Local group",
author = "V. Belokurov and Zucker, {D. B.} and Evans, {N. W.} and Kleyna, {J. T.} and S. Koposov and Hodgkin, {S. T.} and Irwin, {M. J.} and G. Gilmore and Wilkinson, {M. I.} and M. Fellhauer and Bramich, {D. M.} and Hewett, {P. C.} and S. Vidrih and {De Jong}, {J. T A} and Smith, {J. A.} and Rix, {H. W.} and Bell, {E. F.} and Wyse, {R. F G} and Newberg, {H. J.} and Mayeur, {P. A.} and B. Yanny and Rockosi, {C. M.} and Gnedin, {O. Y.} and Schneider, {D. P.} and Beers, {T. C.} and Barentine, {J. C.} and H. Brewington and J. Brinkmann and M. Harvanek and Kleinman, {S. J.} and J. Krzesinski and D. Long and A. Nitta and Snedden, {S. A.}",
year = "2007",
month = "1",
day = "10",
doi = "10.1086/509718",
language = "English",
volume = "654",
pages = "897--906",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 I",

}

TY - JOUR

T1 - Cats and dogs, hair and a hero

T2 - A quintet of new milky way companions

AU - Belokurov, V.

AU - Zucker, D. B.

AU - Evans, N. W.

AU - Kleyna, J. T.

AU - Koposov, S.

AU - Hodgkin, S. T.

AU - Irwin, M. J.

AU - Gilmore, G.

AU - Wilkinson, M. I.

AU - Fellhauer, M.

AU - Bramich, D. M.

AU - Hewett, P. C.

AU - Vidrih, S.

AU - De Jong, J. T A

AU - Smith, J. A.

AU - Rix, H. W.

AU - Bell, E. F.

AU - Wyse, R. F G

AU - Newberg, H. J.

AU - Mayeur, P. A.

AU - Yanny, B.

AU - Rockosi, C. M.

AU - Gnedin, O. Y.

AU - Schneider, D. P.

AU - Beers, T. C.

AU - Barentine, J. C.

AU - Brewington, H.

AU - Brinkmann, J.

AU - Harvanek, M.

AU - Kleinman, S. J.

AU - Krzesinski, J.

AU - Long, D.

AU - Nitta, A.

AU - Snedden, S. A.

PY - 2007/1/10

Y1 - 2007/1/10

N2 - We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed up with either the Subaru or the Isaac Newton Telescopes. They include four probable new dwarf galaxies - one each in the constellations of Coma Berenices, Canes Venatici, Leo, and Hercules - together with one unusually extended globular cluster, Segue 1. We provide distances, absolute magnitudes, half-light radii, and colormagnitude diagrams for all five satellites. The morphological features of the color-magnitude diagrams are generally well described by the ridge line of the old, metal-poor globular cluster M92. In the past two years, a total of 10 new Milky Way satellites with effective surface brightness μv ≳ 28 mag arcsec-2 have been discovered in SDSS data. They are less luminous, more irregular, and apparently more metal-poor than the previously known nine Milky Way dwarf spheroidals. The relationship between these objects and other populations is discussed. We note that there is a paucity of objects with half-light radii between ∼40 and ∼100 pc. We conjecture that this may represent the division between star clusters and dwarf galaxies.

AB - We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed up with either the Subaru or the Isaac Newton Telescopes. They include four probable new dwarf galaxies - one each in the constellations of Coma Berenices, Canes Venatici, Leo, and Hercules - together with one unusually extended globular cluster, Segue 1. We provide distances, absolute magnitudes, half-light radii, and colormagnitude diagrams for all five satellites. The morphological features of the color-magnitude diagrams are generally well described by the ridge line of the old, metal-poor globular cluster M92. In the past two years, a total of 10 new Milky Way satellites with effective surface brightness μv ≳ 28 mag arcsec-2 have been discovered in SDSS data. They are less luminous, more irregular, and apparently more metal-poor than the previously known nine Milky Way dwarf spheroidals. The relationship between these objects and other populations is discussed. We note that there is a paucity of objects with half-light radii between ∼40 and ∼100 pc. We conjecture that this may represent the division between star clusters and dwarf galaxies.

KW - Galaxies: dwarf

KW - Local group

UR - http://www.scopus.com/inward/record.url?scp=33846556211&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846556211&partnerID=8YFLogxK

U2 - 10.1086/509718

DO - 10.1086/509718

M3 - Article

VL - 654

SP - 897

EP - 906

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 I

ER -