Stellar structures in the outer regions of M 33
نویسندگان
چکیده
منابع مشابه
The stellar halo and outer disk of M 33
We present first results from a Keck/DEIMOS spectroscopic survey of red giant branch (RGB) stars in M33. The radial velocity distributions of the stars in our fields are well described by three Gaussian components, corresponding to a candidate halo component with an uncorrected radial velocity dispersion of σ ≃ 50 km s, a candidate disk component with a dispersion σ ≃ 16 km s, and a third compo...
متن کاملMassive Stellar Content of Giant H Ii Regions in M 33 and M 101 *
Far-ultraviolet (900-1200Å) spectral synthesis of nine giant extragalactic H II regions in M33 and M101 is performed to study their massive stellar content. Several parameters are quantified, predicted, and compared to the literature: age, stellar mass, IMF slope, number of O-type and Wolf-Rayet stars, Hα and 5500Å continuum fluxes. The results of this particular technique are consistent with o...
متن کاملYoung massive stellar populations in M 33
In this paper we estimate the ratio OB stars to red supergiants (OB/R) as a function of the distance from the centre of M 33. We found a gradient of the ratio (OB/R) really exists. Our study is based on a new approach in estimating the errors on the ratio (OB/R). On the other hand, by applying a new correlation technique between OB star candidates and red supergiant candidates in the central re...
متن کامل3 Correlation between stellar populations in M 33
A method for identification of stellar complexes in M 33 is applied. Several OB associations form a stellar complex with mean size of 0.3-1 kpc. We apply a correlation technique to compare different stellar populations in M 33. Our results confirm the existence of a strong correlation between OB stars, H II regions and WR stars, which trace the regions of massive star formation. There is a good...
متن کاملThe distance of M 33 and the stellar population in its outskirts
We present deep V,I photometry of two 9.4 ′ × 9.4 ′ field in the outer regions of the M 33 galaxy. We obtain a robust detection of the luminosity of the Red Giant Branch Tip (I T RGB = 20.72 ± 0.08) from which we derived a new estimate of the distance modulus of M 33, (m − M) 0 = 24.64 ± 0.15, corresponding to a distance D = 847 ± 60 Kpc. By comparison of the color and magnitude of the observed...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2011
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201117019