TY  - JOUR
A1  - Gagne, Marc
A1  - Fehon, Garrett
A1  - Savoy, Michael R.
A1  - Cohen, David H.
A1  - Townsley, Leisa K.
A1  - Broos, Patrick S.
A1  - Povich, Matthew S.
A1  - Corcoran, Michael F.
A1  - Walborn, Nolan R.
A1  - Evans, Nancy Remage
A1  - Moffat, Anthony F. J.
A1  - Naze, Yael
A1  - Oskinova, Lida
T1  - Carina ob stars: x-ray signatures of wind shocks and magnetic FIELDS
T2  - The astrophysical journal : an international review of spectroscopy and astronomical physics ; Supplement series
N2  - The Chandra Carina Complex contains 200 known O- and B-type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available optical/X-ray database to identify OB stars that depart from the canonical L-X/L-bol relation or whose average X-ray temperatures exceed 1 keV. Among the single O stars with high kT we identify two candidate magnetically confined wind shock sources: Tr16-22, O8.5 V, and LS 1865, O8.5 V((f)). The O4 III(fc) star HD 93250 exhibits strong, hard, variable X-rays, suggesting that it may be a massive binary with a period of > 30 days. The visual O2 If* binary HD 93129A shows soft 0.6 keV and hard 1.9 keV emission components, suggesting embedded wind shocks close to the O2 If* Aa primary and colliding wind shocks between Aa and Ab. Of the 11 known O-type spectroscopic binaries, the long orbital-period systems HD 93343, HD 93403, and QZ Car have higher shock temperatures than short-period systems such as HD 93205 and FO 15. Although the X-rays from most B stars may be produced in the coronae of unseen, low-mass pre-main-sequence companions, a dozen B stars with high L-X cannot be explained by a distribution of unseen companions. One of these, SS73 24 in the Treasure Chest cluster, is a new candidate Herbig Be star.
KW  - open clusters and associations: individual (Cl Bochum 10, Cl Bochum 11, Cl Collinder 228, Cl Trumpler 14, Cl Trumpler 15, Cl Trumpler 16)
KW  - stars: early-type
KW  - stars: individual (HD 93250, HD 93129A, HD 93403, HD 93205, HD 93343, QZ Car, SS73 24, FO 15, Cl Trumpler 16 22, CPD-59 2610, HD 93501)
KW  - X-rays: stars
Y1  - 2011
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/36871
SN  - 0067-0049
VL  - 194
IS  - 1
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -