2001MNRAS.326...85M

Query : 2001MNRAS.326...85M

2001MNRAS.326...85M - Mon. Not. R. Astron. Soc., 326, 85-94 (2001/September-1)

Optical spectroscopy of X-Mega targets - II. The massive double-lined O-type binary HD 93205.

MORRELL N.I., BARBA R.H., NIEMELA V.S., CORTI M.A., ALBACETE COLOMBO J.F., RAUW G., CORCORAN M., MOREL T., BERTRAND J.-F., MOFFAT A.F.J. and ST-LOUIS N.

Abstract (from CDS):

A new high-quality set of orbital parameters for the O-type spectroscopic binary HD 93205 has been obtained combining échelle and coudé CCD observations. The radial velocity orbits derived from the Heii λ4686Å (primary component) and Hei λ4471Å (secondary component) absorption lines yield semi-amplitudes of 133±2 and 314±2km.s–1 for each binary component, resulting in minimum masses of 31 and 13M☉ (q=0.42). We also confirm for the binary components the spectral classification of O3V+O8V previously assigned. Assuming for the O8V component a `normal' mass of 22-25M☉ we would derive for the primary O3V a mass of `only' 52-60M☉ and an inclination of about 55° for the orbital plane. We have also determined for the first time a period of apsidal motion for this system, namely 185±16yr using all available radial velocity data sets of HD 93205 (from 1975 to 1999). Phase-locked variations of the X-ray emission of HD 93205 consisting of a rise of the observed X-ray flux near periastron passage are also discussed.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): binaries: general - stars: early-type - stars: individual: HD 93205 - X-rays: stars

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* AO Cas SB* 00 17 43.0633133256 +51 25 59.116450728 5.04 6.01 6.14     O9.2II+O8V((f)) 335 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 * iot Ori SB* 05 35 25.9861932063 -05 54 35.598684624 1.45 2.53 2.77     O9IIIvar 793 0
4 HD 46223 Y*O 06 32 09.3068103600 +04 49 24.705695568 6.73 7.50 7.28 6.95 6.79 O4V((f)) 406 0
5 HD 57682 * 07 22 02.0546074728 -08 58 45.766323408 5.20 6.24 6.43     O9.2IV 275 0
6 HD 73882 ** 08 39 09.53412 -40 25 09.2608 7.07 7.59 7.19 6.67 6.30 O8.5IV 261 1
7 HD 92740 WR* 10 41 17.5158425712 -59 40 36.895992960 5.68 6.50 6.42 7.38   WN7h+O9III-V 426 0
8 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0
9 HD 93129 ** 10 43 57.462360 -59 32 51.27000 6.26 7.840 7.884 7.839   O2If*+O3.5V((f)) 208 1
10 Cl Collinder 228 OpC 10 44 00 -60 05.2           ~ 211 0
11 HD 93162 WR* 10 44 10.3890266112 -59 43 11.106500520 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 374 0
12 HD 93204 * 10 44 32.3390794992 -59 44 31.020804780 7.63 8.52 8.42 8.20 7.92 O5.5V((f)) 200 0
13 V* V560 Car SB* 10 44 33.7393258944 -59 44 15.434446956 6.89 7.80 7.75 7.56 7.46 O3.5V((f))+O8V 314 0
14 HD 93250 ** 10 44 45.0275085072 -59 33 54.680974848 6.73 8.12 7.50 8.38   O4III(fc) 334 0
15 Cl Trumpler 16 OpC 10 45 01.9 -59 42 00           ~ 510 0
16 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
17 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
18 HD 303308 ** 10 45 05.9147911152 -59 40 05.925360036 7.45 8.30 8.17 7.92 7.75 O4.5V((fc)) 314 0
19 CPD-59 2629 * 10 45 08.2352224872 -59 46 06.976659612 10.780 11.336 10.848   9.971 O8.5Vp 78 0
20 V* HH Car SB* 10 53 36.6688581336 -59 27 17.836206984 10.13 10.79 10.50 10.37   OB 49 0
21 HD 96715 * 11 07 32.8167251952 -59 57 48.704400540 7.51 8.32 8.28 9.04   O4V((f))z 125 0
22 V* EM Car SB* 11 12 04.5060592584 -61 05 42.944560584 8.06 8.80 8.54 9.25   O7.5V((f))+O7.5V((f)) 172 0

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