2003A&A...405L..33V


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.24CET08:36:27

2003A&A...405L..33V - Astronomy and Astrophysics, volume 405, L33-36 (2003/7-3)

Discovery of a dust cloud next to σ Orionis.

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

Abstract (from CDS):

We report on the discovery of a mid-infrared source at a projected distance of only 1200-AU from the O9.5V star σ Orionis. The spatially resolved, fan-shaped morphology and the presence of an ionization front, as well as evidence in the spectrum for processed dust grains, all suggest that it is a proto-planetary disk being dispersed by the intense ultraviolet radiation from σOrionis. We compute the mass budget and the photo-evaporation timescale, and discuss the possible nature of this remarkable object.

Abstract Copyright:

Journal keyword(s): circumstellar matter - stars: formation - stars: individual: σ Orionis (HD 37468) - systems: protoplanetary disks - infrared: stars planetary

Nomenclature: NAME SIG ORI IRS 1

Simbad objects: 11

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Number of rows : 11

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 * bet Cet PM* 00 43 35.37090 -17 59 11.7827 3.90 3.02 2.01 1.29 0.78 G9.5IIICH-1 496 0
2 * eps Lep PM* 05 05 27.6653698 -22 22 15.723893 6.41 4.64 3.18 2.08 1.27 K4III 141 0
3 M 42 HII 05 35 17.3 -05 23 28           ~ 3682 0
4 NAME Ori A MoC 05 38 -07.1           ~ 2631 0
5 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 476 0
6 * sig Ori C Y*? 05 38 44.1192385581 -02 36 06.309707031   8.77 8.79   9.63 A2Vn 26 0
7 * sig Ori Y*O 05 38 44.7665260139 -02 36 00.284709290 2.54 3.58 3.79 3.87 4.11 O9.5V 734 0
8 NAME sig Ori IRS 1 * 05 38 44.9 -02 35 57           ~ 15 0
9 * sig Ori D Y*O 05 38 45.6255496741 -02 35 58.888435332 5.7 6.51 6.69   6.98 B2V 47 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 394 0
11 NGC 3603 HII 11 15 24 -61 15.0           ~ 926 2

    Equat.    Gal    SGal    Ecl

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2020.01.24-08:36:27

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