An SDSS Sky survey for resolved milky way satellite galaxies. II. High-velocity clouds in the early data release

Beth Willman; Julianne Dalcanton; Željko Ivezić; Donald P. Schneider; Donald G. York

doi:10.1086/344163

An SDSS Sky survey for resolved milky way satellite galaxies. II. High-velocity clouds in the early data release

Beth Willman, Julianne Dalcanton, Željko Ivezić, Donald P. Schneider, Donald G. York

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23 Scopus citations

Abstract

In this paper, we limit the stellar content of 13 high-velocity clouds (HVCs; including one compact HVC) using the detection limits of a new survey for resolved Milky Way satellite galaxies in the Sloan Digital Sky Survey Early Data Release (EDR). Our analysis is sensitive to stellar associations within the virial radius of the Milky Way that are up to 50 times fainter than the faintest known Milky Way satellites. Statistically, we find no stellar overdensity associated with any of the clouds. These nondetections suggest lower limits of M_{H I}/L_V that range between ∼0.2 and 250, assuming cloud distances of 50 and 300 kpc and using fiducial optical scale lengths of 3′ and 7′. We explore the implication of these nondetections on the origin of the HVCs.

Original language	English (US)
Pages (from-to)	2600-2606
Number of pages	7
Journal	Astronomical Journal
Volume	124
Issue number	5 1763
DOIs	https://doi.org/10.1086/344163
State	Published - Nov 2002

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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title = "An SDSS Sky survey for resolved milky way satellite galaxies. II. High-velocity clouds in the early data release",

abstract = "In this paper, we limit the stellar content of 13 high-velocity clouds (HVCs; including one compact HVC) using the detection limits of a new survey for resolved Milky Way satellite galaxies in the Sloan Digital Sky Survey Early Data Release (EDR). Our analysis is sensitive to stellar associations within the virial radius of the Milky Way that are up to 50 times fainter than the faintest known Milky Way satellites. Statistically, we find no stellar overdensity associated with any of the clouds. These nondetections suggest lower limits of MH I/LV that range between ∼0.2 and 250, assuming cloud distances of 50 and 300 kpc and using fiducial optical scale lengths of 3′ and 7′. We explore the implication of these nondetections on the origin of the HVCs.",

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TY - JOUR

T1 - An SDSS Sky survey for resolved milky way satellite galaxies. II. High-velocity clouds in the early data release

AU - Willman, Beth

AU - Dalcanton, Julianne

AU - Ivezić, Željko

AU - Schneider, Donald P.

AU - York, Donald G.

PY - 2002/11

Y1 - 2002/11

N2 - In this paper, we limit the stellar content of 13 high-velocity clouds (HVCs; including one compact HVC) using the detection limits of a new survey for resolved Milky Way satellite galaxies in the Sloan Digital Sky Survey Early Data Release (EDR). Our analysis is sensitive to stellar associations within the virial radius of the Milky Way that are up to 50 times fainter than the faintest known Milky Way satellites. Statistically, we find no stellar overdensity associated with any of the clouds. These nondetections suggest lower limits of MH I/LV that range between ∼0.2 and 250, assuming cloud distances of 50 and 300 kpc and using fiducial optical scale lengths of 3′ and 7′. We explore the implication of these nondetections on the origin of the HVCs.

AB - In this paper, we limit the stellar content of 13 high-velocity clouds (HVCs; including one compact HVC) using the detection limits of a new survey for resolved Milky Way satellite galaxies in the Sloan Digital Sky Survey Early Data Release (EDR). Our analysis is sensitive to stellar associations within the virial radius of the Milky Way that are up to 50 times fainter than the faintest known Milky Way satellites. Statistically, we find no stellar overdensity associated with any of the clouds. These nondetections suggest lower limits of MH I/LV that range between ∼0.2 and 250, assuming cloud distances of 50 and 300 kpc and using fiducial optical scale lengths of 3′ and 7′. We explore the implication of these nondetections on the origin of the HVCs.

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An SDSS Sky survey for resolved milky way satellite galaxies. II. High-velocity clouds in the early data release

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