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| Query : 2003A&A...405L..33V |
2003A&A...405L..33V - Astronomy and Astrophysics, volume 405L33-36 (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
| 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 - 2026 |
#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 | 543 | 1 |
| 2 | * eps Lep | PM* | 05 05 27.6644072506 | -22 22 15.724153311 | 6.41 | 4.64 | 3.18 | 2.08 | 1.27 | K4III | 169 | 0 |
| 3 | M 42 | HII | 05 35 16.8 | -05 23 15 | ~ | 4411 | 0 | |||||
| 4 | NAME Ori A | MoC | 05 38 | -07.1 | ~ | 3187 | 0 | |||||
| 5 | NAME sig Ori Cluster | OpC | 05 38 42 | -02 36.0 | ~ | 623 | 0 | |||||
| 6 | * sig Ori C | Y*? | 05 38 44.1189397296 | -02 36 06.310060884 | 8.77 | 8.79 | 9.63 | A2Vn | 33 | 0 | ||
| 7 | * sig Ori | Y*O | 05 38 44.7653828520 | -02 36 00.283179888 | 2.54 | 3.58 | 3.79 | 3.87 | 4.11 | O9.5V+B0.2V(n) | 855 | 0 |
| 8 | NAME sig Ori IRS 1 | * | 05 38 44.9 | -02 35 57 | ~ | 15 | 0 | |||||
| 9 | * sig Ori D | Y*O | 05 38 45.6253355112 | -02 35 58.894678824 | 5.7 | 6.51 | 6.69 | 6.98 | B2V | 67 | 0 | |
| 10 | * sig Ori E | Y*O | 05 38 47.2050040320 | -02 35 40.521424812 | 5.66 | 6.38 | 6.46 | 6.84 | 7.08 | B2IV-Vp_He | 486 | 0 |
| 11 | NGC 3603 | OpC | 11 14 57.9 | -61 14 32 | ~ | 1136 | 1 |
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