AustralieFrV1, Main, Exploration, bibRecord, 00A863

The tidal trail of NGC 205?

Identifieur interne : 00A863 ( Main/Exploration ); précédent : 00A862; suivant : 00A864

The tidal trail of NGC 205?

Auteurs : A. W. Mcconnachie [Royaume-Uni] ; M. J. Irwin ; G. F. Lewis [Australie] ; R. A. Ibata [France] ; S. C. Chapman [États-Unis] ; A. M. N. Ferguson [Allemagne] ; N. R. Tanvir

Source :

Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2004-07.

RBID : ISTEX:BB88755DA2BFD20E41E852274BB7F5C4B48B2123

Descripteurs français

Pascal (Inist)
- Brillance surface, Deimos, Dispersion vitesse, Etoile géante, Etoile rouge, Galaxies elliptiques, Galaxies naines, Groupe local, Géante rouge, Satellite Mars, Vitesse radiale.

English descriptors

Abstract

Using data taken as part of the Isaac Newton Telescope Wide Field Camera (INT WFC) survey of M31, we have identified an arc‐like overdensity of blue, presumably metal‐poor, red giant branch stars in the north‐west quadrant of M31. This feature is ∼ 1° (15 kpc) in extent and has a surface brightness of ΣV′≃ 28.5 ± 0.5 mag arcsec−2. The arc appears to emanate from the dwarf elliptical galaxy NGC 205, and the colour of its red giant branch is significantly different from the M31 disc population but closely resembles that of NGC 205. Further, using data taken with the Deep Imaging Multi‐Object Spectrograph (DEIMOS) on Keck II, we identify the radial velocity signature of this arc. Its velocity dispersion is measured to be ≃ 10 km s−1, similar to that of the central regions of NGC 205 and typical of stellar streams. Based upon the spatial coincidence of these objects, the surface brightness, the velocity dispersions and the similarity in colour of the red giant branches, we postulate that the arc is part of a stellar stream, the progenitor of which is NGC 205.

Url:

DOI: 10.1111/j.1365-2966.2004.08076.x

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">Using data taken as part of the Isaac Newton Telescope Wide Field Camera (INT WFC) survey of M31, we have identified an arc‐like overdensity of blue, presumably metal‐poor, red giant branch stars in the north‐west quadrant of M31. This feature is ∼ 1° (15 kpc) in extent and has a surface brightness of ΣV′≃ 28.5 ± 0.5 mag arcsec−2. The arc appears to emanate from the dwarf elliptical galaxy NGC 205, and the colour of its red giant branch is significantly different from the M31 disc population but closely resembles that of NGC 205. Further, using data taken with the Deep Imaging Multi‐Object Spectrograph (DEIMOS) on Keck II, we identify the radial velocity signature of this arc. Its velocity dispersion is measured to be ≃ 10 km s−1, similar to that of the central regions of NGC 205 and typical of stellar streams. Based upon the spatial coincidence of these objects, the surface brightness, the velocity dispersions and the similarity in colour of the red giant branches, we postulate that the arc is part of a stellar stream, the progenitor of which is NGC 205.</div>
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Serveur d'exploration sur les relations entre la France et l'Australie

The tidal trail of NGC 205?

The tidal trail of NGC 205?

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Serveur d'exploration sur les relations entre la France et l'Australie
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