2001A&A...370..121S


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.19CEST04:50:03

2001A&A...370..121S - Astronomy and Astrophysics, volume 370, 121-135 (2001/4-4)

HD 152248: Evidence for a colliding wind interaction.

SANA H., RAUW G. and GOSSET E.

Abstract (from CDS):

We present the results of a four year spectroscopic campaign on the early-type binary system HD 152248. Our analysis yields a new classification as O7.5III(f) + O7III(f), in contradiction with previous classifications of the components as supergiants. We derive improved orbital elements and the corresponding masses (M1=29.6M and M2=29.9M) are somewhat larger than previously reported in the literature, although they are still significantly lower than the ones expected from evolutionary tracks. Both components of the system are close to filling their Roche lobe at periastron passage. We also investigate the equivalent width variations of the lines of the two components and we discuss their relation to the Struve-Sahade effect. Finally, we show that the line profile variability of the HeIIl4686 and Hαlines is consistent with a strong wind interaction between the two stars, quite as predicted by current colliding wind models.

Abstract Copyright:

Journal keyword(s): binaries: close - binaries: spectroscopic - stars: early-type - stars: fundamental parameters - stars: individual: HD 152248 - stars: winds, outflows

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* AO Cas WU* 00 17 43.0629024684 +51 25 59.115602831 5.04 6.01 6.14     O9.2II+O8V((f)) 318 0
2 V* AE Aur Or* 05 16 18.1489437436 +34 18 44.347016027 5.48 6.18 5.96     O9.5V 526 1
3 HD 47129 SB* 06 37 24.0417003671 +06 08 07.376246443 5.23 6.11 6.06     O8I+O7.5III 370 0
4 * 29 CMa bL* 07 18 40.3796893709 -24 33 31.311819488 3.80 4.80 4.95 4.95 5.08 O7Iafpvar 398 0
5 HD 93403 SB* 10 45 44.1189478816 -59 24 28.162328313 6.72 8.46 8.27 8.35   O5.5III(fc)var 182 1
6 NGC 6231 OpC 16 54 08.51 -41 49 36.0   2.83 2.6     ~ 487 0
7 HD 152248 bL* 16 54 10.0614779606 -41 49 30.143138696 5.56 6.15 6.088     O7Iabf+O7Ib(f) 230 0
8 HD 152270 WR* 16 54 19.6991728950 -41 49 11.535393651 6.26 6.80 6.597 6.72 6.39 WC7+O5-8 285 0

    Equat.    Gal    SGal    Ecl

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2020.09.19-04:50:03

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