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Properties of galactic B[e] supergiants. IV. Hen3-298 and Hen3-303 | | A. S. Miroshnichenko
; K. S. Bjorkman
; M. Grosso
; K. Hinkle
; H. Levato
; F. Marang
; | | Date: |
7 Mar 2005 | | Subject: | astro-ph | | Abstract: | We present the results of optical and near-IR spectroscopic and near-IR photometric observations of the emission-line stars Hen3-298 and Hen3-303. Strong emission in the H-alpha line is found in both objects. The presence of Fe II and [O I] emission lines in the spectrum of Hen3-298 indicates that it is a B[e] star. The double-peaked CO line profiles, found in the infrared spectrum of Hen3-298, along with the optical line profiles suggest that the star is surrounded by a rotating circumstellar disk. Both objects also show infrared excesses, similar to those of B[e] stars. The radial velocities of the absorption and emission lines as well as a high reddening level suggest that the objects are located in the Norma spiral arm at a distance of 3-4.5 kpc. We estimated a luminosity of log (L/L_sun) ~ 5.1 and a spectral type of no earlier than B3 for Hen3-298. Hen3-303 seems to be a less luminous B-type object (log (L/L_sun) ~ 4.3), located in the same spiral arm. | | Source: | arXiv, astro-ph/0503155 | | Services: | Forum | Review | PDF | Favorites | |
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