2005ApJ...628..986G

Query : 2005ApJ...628..986G

2005ApJ...628..986G - Astrophys. J., 628, 986-1005 (2005/August-1)

Chandra HETGS multiphase spectroscopy of the young magnetic O star θ1 Orionis C.

GAGNE M., OKSALA M.E., COHEN D.H., TONNESEN S.K., UD-DOULA A., OWOCKI S.P., TOWNSEND R.H.D. and MacFARLANE J.J.

Abstract (from CDS):

We report on four Chandra grating observations of the oblique magnetic rotator θ1 Ori C (O5.5 V), covering a wide range of viewing angles with respect to the star's 1060 G dipole magnetic field. We employ line-width and centroid analyses to study the dynamics of the X-ray-emitting plasma in the circumstellar environment, as well as line-ratio diagnostics to constrain the spatial location, and global spectral modeling to constrain the temperature distribution and abundances of the very hot plasma. We investigate these diagnostics as a function of viewing angle and analyze them in conjunction with new MHD simulations of the magnetically channeled wind shock mechanism on θ1 Ori C. This model fits all the data surprisingly well, predicting the temperature, luminosity, and occultation of the X-ray-emitting plasma with rotation phase.

Abstract Copyright: ∼

Journal keyword(s): Stars: Early-Type - Stars: Individual: Henry Draper Number: HD 37022 - Stars: Magnetic Fields - Stars: Mass Loss - Stars: Rotation - Stars: Winds, Outflows - X-Rays: Stars

Errata: erratum vol.634, p.712 (2005)

Simbad objects: 12

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Number of rows : 12
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 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1253 0
2 V* IQ Aur a2* 05 19 00.0284573784 +33 44 54.220806888   5.201 5.371     A0p 293 0
3 * del Ori ** 05 32 00.40009 -00 17 56.7424 0.96 2.02 2.41 2.32 2.54 O9.5IINwk 796 0
4 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
5 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1479 1
6 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
7 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
8 * tet Ori ** 05 35.3 -05 24           ~ 41 1
9 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
10 * sig Ori E Y*O 05 38 47.2050040320 -02 35 40.521424812 5.66 6.38 6.46 6.84 7.08 B2IV-Vp_He 486 0
11 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1190 1
12 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0V 959 0

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