Massive early-type emission-line stars: an attempt to distinguish a new group of stellar objects

1995 ◽  
Vol 224 (1-2) ◽  
pp. 519-520 ◽  
Author(s):  
A. S. Miroshnichenko ◽  
Yu. K. Bergner ◽  
D. B. Mukanov ◽  
T. A. Shejkina
1995 ◽  
pp. 519-520
Author(s):  
A. S. Miroshnichenko ◽  
YU. K. Bergner ◽  
D. B. Mukanov ◽  
T. A. Shejkina

2007 ◽  
Vol 3 (S245) ◽  
pp. 233-234
Author(s):  
A. Beifiori ◽  
E. M. Corsini ◽  
E. Dalla Bontà ◽  
A. Pizzella ◽  
L. Coccato ◽  
...  

AbstractThe growth of supermassive black holes (SMBHs) appears to be closely linked with the formation of spheroids. There is a pressing need to acquire better statistics on SMBH masses, since the existing samples are preferentially weighted toward early-type galaxies with very massive SMBHs. With this motivation we started a project aimed at measuring upper limits on the mass of the SMBHs that can be present in the center of all the nearby galaxies (D < 100 Mpc) for which STIS/G750M spectra are available in the HST archive. These upper limits will be derived by modeling the central emission-line widths ([N II] λλ6548, 6583, Hα and [S II] λλ6716, 6731) observed over an aperture of ~01 (R < 50 pc). Here we present our preliminary results for a subsample of 76 bulges.


2010 ◽  
Vol 45 ◽  
pp. 373-376 ◽  
Author(s):  
R. Blomme ◽  
Y. Frémat ◽  
A. Lobel ◽  
C. Martayan

1996 ◽  
Vol 169 ◽  
pp. 225-230
Author(s):  
R. D. Blum ◽  
D. L. Depoy ◽  
K. Sellgren

We have obtained R ≈ 570 resolution K band spectra of eight sources in the Galactic Center, including four sources within the IRS 16 cluster, IRS 13, IRS 1W, and the compact He I emission line sources AF (also known as AHH) and AHH NW. We have also obtained R ≈ 570 H and K band spectra of nine galactic and LMC early–type mass–losing stars, including Ofpe/WN9 and WN stars. The spectra of both the Galactic Center sources and the comparison stars show a wide range of behavior in the He I (1.70 μm, 2.06 μm, 2.11 μm) and H I (Brackett series) lines. We find significantly larger He I equivalent widths in the AF source and two galactic early type mass losing stars than in any of the LMC stars. Several of the Galactic Center He I sources are found to have higher He I velocity widths than any of the galactic or LMC early type mass losing stars. At least one source, IRS 13, shows a strong red wing to the He I 2.06 μm emission.


1987 ◽  
Vol 322 ◽  
pp. 164 ◽  
Author(s):  
Wei Zheng ◽  
E. Margaret Burbridge ◽  
Harding E. Smith ◽  
Ross D. Cohen ◽  
Steven E. Bradley

1996 ◽  
Vol 467 ◽  
pp. 197 ◽  
Author(s):  
John S. Mulchaey ◽  
Andrew S. Wilson ◽  
Zlatan Tsvetanov

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