2001A&A...368L..13L


Query : 2001A&A...368L..13L

2001A&A...368L..13L - Astronomy and Astrophysics, volume 368, L13-16 (2001/3-4)

Disks around hot stars in the Trifid nebula.

LEFLOCH B., CERNICHARO J., CESARSKY D., DEMYK K. and RODRIGUEZ L.F.

Abstract (from CDS):

We report on mid-IR observations of the central region in the Trifid nebula, carried out with ISOCAM in several broad-band infrared filters and in the low resolution spectroscopic mode provided by the circular variable filter. Analysis of the emission indicates the presence of a hot dust component (500 to 1000K) and a warm dust component at lower temperatures (∼150-200K) around several members of the cluster exciting the HII region, and other stars undetected at optical wavelengths. Complementary VLA observations suggest that the mid-IR emission could arise from a dust cocoon or a circumstellar disk, evaporated under the ionization of the central source and the exciting star of the nebula. In several sources the 9.7 µm silicate band is seen in emission. One young stellar source shows indications of crystalline silicates in the circumstellar dust.

Abstract Copyright:

Journal keyword(s): (ISM:) dust, extinction - (ISM:) HII regions - ISM: individual: Trifid - stars: formation

Nomenclature: Figs 1: [LCC2001b] IRS N (Nos 1-7).

Errata: Erratum vol. 372, p. L65 (2001)

CDS comments: Components B, C, D... = HD 164492B, C, D...

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2675 2
2 M 42 HII 05 35 17.3 -05 23 28           ~ 3902 0
3 NAME Ori A MoC 05 38 -07.1           ~ 2841 0
4 QSO J1744-3116 Bla 17 44 23.57824 -31 16 36.2943           ~ 138 1
5 [LCC2001b] IRS 6 IR 18 02 14.1 -23 01 44           ~ 3 0
6 [LCC2001b] IRS 7 IR 18 02 16.8 -23 00 52           ~ 3 0
7 [LCC2001b] IRS 5 IR 18 02 21.1 -23 01 04           ~ 2 0
8 NGC 6514 149 * 18 02 21.9929175720 -23 02 25.560942180       13.13   ~ 7 0
9 NGC 6514 147 * 18 02 23.0573846112 -23 02 05.974579176     12.4     F3V 9 1
10 EM* LkHA 123 Em* 18 02 23.13015 -23 01 59.9462   8.72 6.80 9.37   B6V 41 0
11 [YBG2005] HST 1 * 18 02 23.22 -23 01 51.9           ~ 3 0
12 HD 164492 Y*O 18 02 23.5527520992 -23 01 50.999556180 6.49 7.49 6.80 7.52   O7.5Vz 219 0
13 HD 164492B sg* 18 02 23.7095503200 -23 01 45.155769456   8.0 12.06     A2Ia 19 0
14 NGC 6514 148 Y*O 18 02 25.8632041824 -23 01 42.420957888       15.87   ~ 8 0
15 M 20 OpC 18 02 42 -22 58.3           ~ 416 1

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2022.05.28-11:47:42

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