2004A&A...418..663O


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET07:26:33

2004A&A...418..663O - Astronomy and Astrophysics, volume 418, 663-673 (2004/5-1)

Mid-infrared observations of young stellar objects in the vicinity of σ Orionis.

OLIVEIRA J.M. and VAN LOON J.T.

Abstract (from CDS):

We present new mid-infrared observations of objects in the vicinity of the O-star σ Orionis, obtained with TIMMI-2 at ESO. By constraining their near- and mid-infrared spectral energy distributions, we established the nature of previously known IRAS sources and identified new mid-infrared sources as young stellar objects with circumstellar disks, likely massive members of the σ Ori cluster. For two of these objects we have obtained spectroscopy in the 8-13µm range in order to investigate the chemistry of the dust grains. TX Ori exhibits a typical silicate emission feature at 10µm, with a feature at about 11.2µm that we identify as due to crystalline olivine. The IRAS05358-0238 spectrum is very unusual, with a weak silicate feature and structure in the range 10-12µm that may be explained as due to self-absorbed forsterite. We also provide the first evidence for the presence of circumstellar disks in the jet sources Haro 5-39/HH 447, V510 Ori/HH 444 and V603 Ori/HH 445.

Abstract Copyright:

Journal keyword(s): stars: circumstellar matter - stars: pre-main sequence - stars: planetary systems: protoplanetary disks - infrared: stars - Galaxy: open clusters and associations: individual: σ Orionis

Simbad objects: 19

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Number of rows : 19

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 Tau-Aur Complex SFR 04 30 +25.0           ~ 1227 0
2 HD 294268 Y*O 05 38 14.1177550239 -02 15 59.758632408   10.93 10.45   10.010 F6e 24 0
3 IRAS 05358-0238 Y*O 05 38 19.7597566344 -02 36 39.136465857 17.86 17.50 15.84 14.07 12.07 M6.0 13 0
4 V* V505 Ori Or* 05 38 27.2561074187 -02 45 09.709148403     14.16 13.54 12.85 K7e 34 0
5 V* TX Ori Or* 05 38 33.6903234807 -02 44 14.132513585 13.75 13.16 12.06 11.38 10.73 K4.5 33 0
6 V* TY Ori Or* 05 38 35.8762546708 -02 43 51.225645914 16.39 15.25 13.88 13.08 12.32 K3.0 19 0
7 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 490 0
8 * sig Ori Y*O 05 38 44.7665260139 -02 36 00.284709290 2.54 3.58 3.79 3.87 4.11 O9.5V 746 0
9 NAME sig Ori IRS 1 * 05 38 44.9 -02 35 57           ~ 15 0
10 * sig Ori E Y*O 05 38 47.2050001416 -02 35 40.514907495 5.66 6.38 6.46 6.84 7.08 B2IV-Vp_He 402 0
11 V* BG Ori Or* 05 39 25.2029732899 -02 38 22.059712657   15.88 14.72 13.78 12.83 K7.5 28 0
12 HH 446 HH 05 39 25.6129225958 -02 38 43.724943438         17.228 ~ 14 0
13 2MASS J05392935-0227209 Y*O 05 39 29.3528925920 -02 27 21.036989789         14.807 M0.0 15 0
14 Haro 5-27 Or* 05 39 39.8261219095 -02 31 21.866213622 14.589   14.30 13.92 13.073 K5.5 59 0
15 V* V603 Ori Or* 05 39 39.8290440126 -02 33 16.042554188 19.253   16.70   13.91 ~ 28 0
16 V* RV Ori Or* 05 39 40.1685616452 -02 20 48.034404463     13.90   12.715 K5.0 19 0
17 V* V608 Ori Or* 05 40 08.8862006785 -02 33 33.783508896     14.63 14.09 13.907 K7.5 30 0
18 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1077 1
19 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3066 0

    Equat.    Gal    SGal    Ecl

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2020.10.28-07:26:33

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