EDP Sciences
Free Access
Volume 436, Number 2, June III 2005
Page(s) 653 - 659
Section Stellar structure and evolution
DOI https://doi.org/10.1051/0004-6361:20052726
Published online 30 May 2005

A&A 436, 653-659 (2005)
DOI: 10.1051/0004-6361:20052726

Properties of galactic B[e] supergiants

IV. Hen 3-298 and Hen 3-303
A. S. Miroshnichenko1, 2, 3, K. S. Bjorkman1, M. Grosso4, K. Hinkle5, H. Levato4 and F. Marang6

1  Ritter Observatory, Dept. of Physics and Astronomy, University of Toledo, Toledo, OH 43606-3390, USA
    e-mail: anatoly@physics.utoledo.edu
2  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
3  Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, 196140 Saint-Petersburg, Russia
4  Complejo Astronómico El Leoncito (CASLEO), Casilla de Correo 467, 5400 San Juan, Argentina
5  National Optical Astronomical Observatories, PO Box 26732, Tucson, AZ 85726-6732, USA
6  South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa

(Received 18 January 2005 / Accepted 20 February 2005 )

We present the results of optical and near-IR spectroscopic and near-IR photometric observations of the emission-line stars Hen 3-298 and Hen 3-303. 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 Hen 3-298 indicates that it is a B[e] star. The double-peaked CO line profiles, found in the infrared spectrum of Hen 3-298, along with the optical line profiles suggest that the star is surrounded by a rotating circumstellar disc. 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  $\log L/L_{\odot} \sim$ 5.1 and a spectral type of no earlier than B3 for Hen 3-298. Hen 3-303 seems to be a less luminous B-type object ( $\log L/L_{\odot} \sim$ 4.3), located in the same spiral arm.

Key words: stars: emission-line, B[e] -- stars: individual: Hen 3-298 -- stars: Hen 3-303 -- techniques: spectroscopic -- techniques: photometric -- circumstellar matter

SIMBAD Objects

© ESO 2005

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.