Velocities of supergiants in the bulge of M 33

Resultado de la investigación: Article

4 Citas (Scopus)

Resumen

Stars brighter than the RGB tip of an old-globular cluster like population are seen in (he M 31 and M 33 bulges from HST (Rich & Mighell 1995), and ground based IR observations (Rich et al. 1993, Minniti et al. 1994). We present radial velocities for individual giants selected among stars in the bright plume of relatively young stars seen in our IR color-magnitude diagrams of the M 33 bulge. The mean velocity of our sample is V = -182 ±13, and the velocity dispersion is σ= 34 ± 9 km/s. Based on the mean velocity we conclude that all but one of these stars are members of M 33. Based on the velocity dispersion, these stars are either associated with the M 33 disk or with the M 33 bulge.

Idioma originalEnglish
Páginas (desde-hasta)715-720
Número de páginas6
PublicaciónAstronomy and Astrophysics
Volumen306
N.º3
EstadoPublished - 20 feb 1996

Huella dactilar

stars
color-magnitude diagram
globular clusters
radial velocity
plumes
plume
diagram

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Citar esto

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title = "Velocities of supergiants in the bulge of M 33",
abstract = "Stars brighter than the RGB tip of an old-globular cluster like population are seen in (he M 31 and M 33 bulges from HST (Rich & Mighell 1995), and ground based IR observations (Rich et al. 1993, Minniti et al. 1994). We present radial velocities for individual giants selected among stars in the bright plume of relatively young stars seen in our IR color-magnitude diagrams of the M 33 bulge. The mean velocity of our sample is V = -182 ±13, and the velocity dispersion is σ= 34 ± 9 km/s. Based on the mean velocity we conclude that all but one of these stars are members of M 33. Based on the velocity dispersion, these stars are either associated with the M 33 disk or with the M 33 bulge.",
keywords = "Galaxies: individual: M 33, Galaxies: kinematics and dynamics, Galaxies: structure; stellar content",
author = "Dante Minniti",
year = "1996",
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language = "English",
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pages = "715--720",
journal = "Astronomy and Astrophysics",
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Velocities of supergiants in the bulge of M 33. / Minniti, Dante.

En: Astronomy and Astrophysics, Vol. 306, N.º 3, 20.02.1996, p. 715-720.

Resultado de la investigación: Article

TY - JOUR

T1 - Velocities of supergiants in the bulge of M 33

AU - Minniti, Dante

PY - 1996/2/20

Y1 - 1996/2/20

N2 - Stars brighter than the RGB tip of an old-globular cluster like population are seen in (he M 31 and M 33 bulges from HST (Rich & Mighell 1995), and ground based IR observations (Rich et al. 1993, Minniti et al. 1994). We present radial velocities for individual giants selected among stars in the bright plume of relatively young stars seen in our IR color-magnitude diagrams of the M 33 bulge. The mean velocity of our sample is V = -182 ±13, and the velocity dispersion is σ= 34 ± 9 km/s. Based on the mean velocity we conclude that all but one of these stars are members of M 33. Based on the velocity dispersion, these stars are either associated with the M 33 disk or with the M 33 bulge.

AB - Stars brighter than the RGB tip of an old-globular cluster like population are seen in (he M 31 and M 33 bulges from HST (Rich & Mighell 1995), and ground based IR observations (Rich et al. 1993, Minniti et al. 1994). We present radial velocities for individual giants selected among stars in the bright plume of relatively young stars seen in our IR color-magnitude diagrams of the M 33 bulge. The mean velocity of our sample is V = -182 ±13, and the velocity dispersion is σ= 34 ± 9 km/s. Based on the mean velocity we conclude that all but one of these stars are members of M 33. Based on the velocity dispersion, these stars are either associated with the M 33 disk or with the M 33 bulge.

KW - Galaxies: individual: M 33

KW - Galaxies: kinematics and dynamics

KW - Galaxies: structure; stellar content

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