2005MNRAS.361..191S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST04:01:55

2005MNRAS.361..191S - Mon. Not. R. Astron. Soc., 361, 191-205 (2005/July-3)

Chandra X-ray observations of the young stellar cluster NGC 6193 in the Ara OB1 association.

SKINNER S.L., ZHEKOV S.A., PALLA F. and BARBOSA C.L.D.R.

Abstract (from CDS):

A 90-ks Chandra High Energy Transmission Grating observation of the young stellar cluster NGC 6193 in the southern Ara OB1 association detected 43 X-ray sources in a 2x2 arcmin2 core region centred on the massive O stars HD 150135 (O6.5V) and HD 150136 (O3 + O6V). The cluster is dominated by exceptionally bright X-ray emission from the two O stars, which are separated by only 10 arcsec. The X-ray luminosity of HD 150136 is logLX= 33.39 (erg/s), making it one of the most luminous O-star X-ray sources known. All of the fainter X-ray sources in the core region have near-infrared (near-IR) counterparts, but existing JHK photometry provides little evidence for near-IR excesses. These core sources have typical mean photon energies <E>~ 2 keV and about one-third are variable. It is likely that some are young low-mass stars in the cluster, but cluster membership remains to be determined. Grating spectra show that the X-ray properties of HD 150135 and HD 150136 are similar, but not identical. Both have moderately broadened unshifted emission lines and their emission is dominated by cool plasma at kT~ 0.3 keV, pointing to a wind-shock origin. However, the emission of HD 150136 is slightly hotter and four times more luminous than its optical twin HD 150135. We discuss the possibility that a radiative colliding wind shock contributes to the prodigious X-ray output of the short-period (2.66 d) spectroscopic binary HD 150136. A surprising result is that the X-ray emission of HD 150136 is slowly variable on a time-scale of <1 d. The origin of the variability is not yet known but the observed behaviour suggests that it is an occultation effect.

Abstract Copyright: 2005 RAS

Journal keyword(s): stars: early-type - stars: formation - stars: individual: HD 150135 - stars: individual: HD 150136 - open clusters and associations: individual: NGC 6193 - X-rays: stars

Nomenclature: Fig.1, Table 2: [SZP2005] NNa (Nos 1-25, 26a-26b, 27-42) = [SZP2005] JHHMMSSss+DDMMSSs N=6.

Simbad objects: 54

goto Full paper

goto View the reference in ADS

Number of rows : 54

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 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1977 1
2 * tet01 Ori A Ae* 05 35 15.8252169327 -05 23 14.332546552 5.87 6.75 6.73 6.42 6.21 B0V 458 1
3 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1272 1
4 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1467 1
5 * tet02 Ori A SB* 05 35 22.9022511214 -05 24 57.817182421 5.37 6.30 6.39 6.30 6.35 O9.5IVp 493 0
6 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1092 1
7 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0.2V 854 0
8 Ass Ara OB 1 As* 16 39.5 -46 46           ~ 86 0
9 GUM 53 HII 16 40 00.1 -48 51 45           ~ 88 1
10 2MASS J16411400-4845528 X 16 41 14.00 -48 45 52.8           ~ 1 0
11 2MASS J16411539-4846092 X 16 41 15.3840390576 -48 46 09.338729479           ~ 1 0
12 2MASS J16411672-4845165 * 16 41 16.7114704733 -48 45 16.533513895           ~ 1 0
13 [SZP2005] 4 X 16 41 16.95 -48 45 46.1           ~ 1 0
14 2MASS J16411706-4846034 * 16 41 17.0557649463 -48 46 03.605929662           ~ 1 0
15 2MASS J16411756-4846008 X 16 41 17.5149426162 -48 46 01.095588539           ~ 1 0
16 2MASS J16411752-4845071 X 16 41 17.52 -48 45 07.1           ~ 1 0
17 2MASS J16411779-4845190 X 16 41 17.79 -48 45 19.0           ~ 1 0
18 [SZP2005] 9 X 16 41 18.14 -48 45 35.0           ~ 1 0
19 2MASS J16411843-4846281 X 16 41 18.4284559856 -48 46 28.178367380           ~ 1 0
20 [SZP2005] 11 X 16 41 18.46 -48 45 36.8           ~ 1 0
21 2MASS J16411852-4845004 * 16 41 18.5167663141 -48 45 00.416126837           ~ 1 0
22 2MASS J16411905-4846024 * 16 41 19.0436136829 -48 46 02.359624741           ~ 2 0
23 2MASS J16411944-4845194 * 16 41 19.4408689546 -48 45 19.410528077           ~ 2 0
24 HD 150135 * 16 41 19.4437431640 -48 45 47.570366793 6.19 7.00 6.88 7.33   O6.5V((f))z 106 0
25 [SZP2005] 16 X 16 41 19.47 -48 45 35.2           ~ 1 0
26 NGC 6193 OpC 16 41 20 -48 45.8           ~ 132 0
27 [SZP2005] 17 X 16 41 20.08 -48 45 54.0           ~ 1 0
28 [SZP2005] 18 X 16 41 20.10 -48 45 23.2           ~ 1 0
29 2MASS J16412012-4845150 * 16 41 20.1280087830 -48 45 15.075470368           ~ 2 0
30 HD 150136 SB* 16 41 20.4156742370 -48 45 46.728092318 4.98 5.78 5.65 6.93   O3.5-4III(f*)+O6IV 171 0
31 [SZP2005] 21 X 16 41 20.52 -48 45 36.5           ~ 1 0
32 2MASS J16412088-4845589 * 16 41 20.8856197622 -48 45 59.120575593   11.6 10.1   9.96 ~ 2 0
33 2MASS J16412099-4846418 * 16 41 20.9875356121 -48 46 41.943694362           ~ 1 0
34 2MASS J16412106-4845217 * 16 41 21.0534889967 -48 45 21.738906911           ~ 2 0
35 2MASS J16412172-4846411 * 16 41 21.7185266917 -48 46 41.106132479           ~ 2 0
36 CD-48 11069 * 16 41 22.0941960198 -48 44 56.991002739 7.86 10.07 9.71 9.92   B0IV 23 0
37 2MASS J16412220-4846044 X 16 41 22.2035553124 -48 46 04.315346579           ~ 1 0
38 [SZP2005] 26b X 16 41 22.25 -48 44 54.8           ~ 1 0
39 2MASS J16412236-4846278 X 16 41 22.3634976958 -48 46 27.907984224           ~ 1 0
40 2MASS J16412240-4845369 * 16 41 22.3972540970 -48 45 36.942346443           ~ 2 0
41 2MASS J16412247-4845241 * 16 41 22.4674341802 -48 45 24.207998883           ~ 1 0
42 2MASS J16412258-4845594 X 16 41 22.5751241496 -48 45 59.455438651           ~ 1 0
43 2MASS J16412276-4845350 * 16 41 22.7601459287 -48 45 35.058835562           ~ 2 0
44 2MASS J16412327-4844494 * 16 41 23.2650555016 -48 44 49.447075632           ~ 2 0
45 2MASS J16412343-4846041 * 16 41 23.4278376028 -48 46 04.212300790           ~ 1 0
46 2MASS J16412383-4845206 * 16 41 23.8248705892 -48 45 20.654118037           ~ 2 0
47 2MASS J16412425-4845436 * 16 41 24.2446496866 -48 45 43.591287876           ~ 2 0
48 NGC 6193 9 * 16 41 24.3981581496 -48 45 52.556341067   12.54 12.27     ~ 2 0
49 2MASS J16412471-4845345 * 16 41 24.7001397879 -48 45 34.552201350           ~ 1 0
50 [SZP2005] 39 X 16 41 24.75 -48 45 45.1           ~ 1 0
51 2MASS J16412558-4846189 * 16 41 25.5906066254 -48 46 19.070004819           ~ 2 0
52 CD-48 11071 SB* 16 41 25.8574771472 -48 45 14.266642810   8.57 8.44     B0V 16 0
53 2MASS J16412625-4845487 * 16 41 26.2421300136 -48 45 48.706748403           ~ 2 0
54 HD 193793 WR* 20 20 27.9763345925 +43 51 16.289775091 6.90 7.25 6.85 4.58   WC7p+O5 649 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2005MNRAS.361..191S and select 'bookmark this link' or equivalent in the popup menu


2020.07.13-04:01:55

© Université de Strasbourg/CNRS

    • Contact