2006A&A...447.1041D


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.30CET02:45:58

2006A&A...447.1041D - Astronomy and Astrophysics, volume 447, 1041-1048 (2006/3-1)

Chandra X-ray observations of the stellar group near the Herbig Be star MWC 297. A revision of the X-ray properties of MWC 297.

DAMIANI F., MICELA G. and SCIORTINO S.

Abstract (from CDS):

We present a Chandra ACIS-I X-ray observation of the region near the Herbig early-Be star MWC 297, where we detect a tight group of point X-ray sources. These are probably physically associated to MWC 297, because of their obvious clustering with respect to the more scattered field-source population. These data are compared to earlier ASCA data with much poorer spatial resolution, from which the detection of strong quiescent and flaring emission from MWC 297 itself was claimed. We argue that this star, contributing only 5% to the total X-ray emission of the group, was probably not the dominant contributor to the observed ASCA emission, while the X-ray brightest star in the group is a much better candidate. This is also supported by the spectral analysis of the Chandra data, with reference to the ASCA spectra. We conclude that none of the X-ray data available for MWC 297 justify the earlier claim of strong magnetic activity in this star. The X-ray emission of MWC 297 during the Chandra observation is even weaker than that found in other Herbig stars with the same spectral type, even accounting for its large line-of-sight absorption.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: individual: MWC 297 - stars: emission-line, Be - stars: coronae - stars: pre-main sequence - X-rays: stars

Nomenclature: Table 1: [DMS2006] NN (Nos 1-27).

Simbad objects: 36

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Number of rows : 36

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 HD 283447 Or* 04 14 12.9232870093 +28 12 12.378540314 13.17 12.07 10.68 9.45 8.67 K3Ve 383 0
2 V* V892 Tau Ae* 04 18 40.6120892867 +28 19 15.641672501   16.6 14.69 14.35   A0Ve 268 0
3 V* V892 Tau B * 04 18 40.7286971409 +28 19 19.283229174           ~ 9 0
4 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 939 2
5 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1285 1
6 V* DX Cha Ae* 12 00 05.0870448690 -78 11 34.559255151   6.81 6.60     A0_sh 308 0
7 HD 139614 pr* 15 40 46.3818973118 -42 29 53.538928508   8.47 8.24     A9VekA5mA5(_lB) 162 0
8 2MASS J18270594-0351577 * 18 27 05.9477437559 -03 51 57.524956200   15.9 14.8     ~ 1 0
9 [DMS2006] 2 X 18 27 06.00 -03 51 57.8           ~ 1 0
10 [DMS2006] 3 X 18 27 21.44 -03 50 47.5           ~ 1 0
11 [DMS2006] 4 X 18 27 25.84 -03 49 05.0           ~ 1 0
12 2MASS J18273709-0349385 Y*O 18 27 37.0939890516 -03 49 38.502090918           ~ 6 0
13 2MASS J18273723-0349466 X 18 27 37.24 -03 49 46.6           ~ 2 0
14 [DMS2006] 7 X 18 27 37.36 -03 50 48.3           ~ 1 0
15 [DMS2006] 9 X 18 27 39.11 -03 49 40.5           ~ 1 0
16 2MASS J18273914-0346113 Y*O 18 27 39.148 -03 46 11.36           ~ 3 0
17 2MASS J18273917-0352188 X 18 27 39.17 -03 52 18.8           ~ 1 0
18 [VOE2005] 2 X 18 27 39.35 -03 49 50.1           ~ 1 0
19 EM* MWC 297 Ae* 18 27 39.5266257570 -03 49 52.136526892 15.57 14.34 12.31 11.34   B1.5Ve 266 0
20 2MASS J18274002-0350501 X 18 27 40.0273812231 -03 50 50.065867441           ~ 1 0
21 [DMS2006] 14 X 18 27 40.36 -03 50 23.4           ~ 1 0
22 2MASS J18274086-0350593 * 18 27 40.8662582946 -03 50 59.176354935           ~ 1 0
23 [GMM2009] MWC 297 11 Y*O 18 27 43.00 -03 47 02.1           ~ 2 0
24 2MASS J18274372-0347288 X 18 27 43.7322311846 -03 47 28.855750789           ~ 1 0
25 [DMS2006] 18 X 18 27 43.98 -03 53 50.4           ~ 1 0
26 2MASS J18274408-0353510 X 18 27 44.1094705669 -03 53 51.098894231           ~ 1 0
27 2MASS J18274498-0353555 X 18 27 44.9896959320 -03 53 55.544082396           ~ 1 0
28 2MASS J18274937-0353404 Y*O 18 27 49.3748443346 -03 53 40.352393238           ~ 3 0
29 2MASS J18274958-0349087 IR 18 27 49.58 -03 49 08.7           ~ 1 0
30 2MASS J18275043-0348371 Y*O 18 27 50.4364645552 -03 48 37.157882430           ~ 3 0
31 2MASS J18275056-0352000 Y*O 18 27 50.5668242443 -03 52 00.091785654           ~ 3 0
32 2MASS J18275231-0353004 X 18 27 52.31 -03 53 00.4           ~ 1 0
33 [DMS2006] 26 X 18 28 03.60 -03 51 59.4           ~ 1 0
34 2MASS J18280564-0352112 Y*O 18 28 05.645 -03 52 11.28           ~ 3 0
35 V* TY CrA Ae* 19 01 40.8312189956 -36 52 33.801844387 10.03 9.92 9.39     B9e 268 0
36 HD 200775 Ae* 21 01 36.9184805541 +68 09 47.770037306 7.34 7.754 7.427 8.13   B2Ve 514 0

    Equat.    Gal    SGal    Ecl

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2020.10.30-02:45:58

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