Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-12-03
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
12 pages, 7 figures, accepted by ApJ
Scientific paper
With an orbital period of about 3.078 days, the double-lined spectroscopic binary HD 48099 is, still now, the only short-period O+O system known in the Mon OB2 association. Even though an orbital solution has already been derived for this system, few information are available about the individual stars. We present, in this paper, the results of a long-term spectroscopic campaign. We derive a new orbital solution and apply a disentangling method to recover the mean spectrum of each star. To improve our knowledge concerning both components, we determine their spectral classifications and their projected rotational velocities. We also constrain the main stellar parameters of both stars by using the CMFGEN atmosphere code and provide the wind properties for the primary star through the study of IUE spectra. This investigation reveals that HD 48099 is an O5.5 V((f))+O9 V binary with M_1 sin^3 i = 0.70 M_{\sun} and M_2 sin^3 i = 0.39 M_{\sun}, implying a rather low orbital inclination. This result, combined with both a large effective temperature and log g, suggests that the primary star (v sini ~ 91 km s^-1) is actually a fast rotator with a strongly clumped wind and a nitrogen abundance of about 8 times the solar value.
de Becker Michael
Eenens Philippe
Gosset Eric
Mahy Laurent
Martins Fabrice
No associations
LandOfFree
A new investigation of the binary HD 48099 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A new investigation of the binary HD 48099, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new investigation of the binary HD 48099 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-517087