Suspected Wolf-Rayet Galaxies UM 456 and UM 594
نویسندگان
چکیده
منابع مشابه
Uv Excess Galaxies: Wolf-rayet Galaxies
We discuss V and R band photometry for 67% of the Sullivan et al. (2000) SA57 ultraviolet-selected galaxy sample. In a sample of 176 UV-selected galaxies, Sullivan et al. (2000) find that 24% have (UV-B) colors too blue for consistency with starburst spectral synthesis models. We propose that these extreme blue, UV excess galaxies are Wolf-Rayet (WR) galaxies, starburst galaxies with strong UV ...
متن کاملMassive Star Populations in Wolf-Rayet Galaxies
We analyze longslit spectral observations of fourteen Wolf-Rayet galaxies from the sample of Schaerer, Contini & Pindao (1999). All 14 galaxies show broad Wolf-Rayet emission in the blue region of the spectrum, consisting of a blend of NIIIλ4640, CIIIλ4650, CIVλ4658, and HeIIλ4686 emission lines, which is a spectral characteristic of WN stars. Broad CIVλ5808 emission, termed the red bump, is de...
متن کاملPopulations of WC and WN stars in Wolf-Rayet galaxies
We report the detection of WC stars in five WolfRayet (W-R) galaxies: He 2-10, NGC 3049, NGC 3125, NGC 5253 and Tol 89. The faint broad C IV λ5808 line requires sufficiently high S/N (>∼ 40) to be detected explaining the nondetection of this WC feature in previous observations. From the measurement of W-R emission lines (N III λ4640+C III λ4650, He II λ4686, and C IV λ5808), we conclude that al...
متن کاملClustering Property of Wolf - Rayet Galaxies in the SDSS ∗
We have analysed, for the first time, the clustering properties of Wolf-Rayet (W-R) galaxies, using a large sample of 846 W-R galaxies selected from the Data Release 4 (DR4) of the Sloan Digital Sky Survey (SDSS). We compute the cross-correlation function between W-R galaxies and a reference sample of galaxies drawn from the DR4. We compare the function to the results for control samples of non...
متن کاملStarbursts in barred spiral galaxies II. Molecular and optical study of three Wolf-Rayet galaxies?
We have searched for dense molecular gas in three barred spiral galaxies with young starbursts, NGC 3049, 5430 and 6764, which are known Wolf-Rayet galaxies. We detected HCN in the latter two, and CS was marginally detected in NGC 6764. The dense molecular gas contents of the three galaxies are compared to those of other galaxies and to other indicators of star formation. The HCN luminosities (...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2002
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20020556