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

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

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

Full paper

View the references in ADS

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 - 2023	#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	512	0
2	* eps Lep	PM*	05 05 27.6653698	-22 22 15.723893	6.41	4.64	3.18	2.08	1.27	K4III	152	0
3	M 42	OpC	05 35 17	-05 23.4						~	3970	0
4	NAME Ori A	MoC	05 38	-07.1						~	2897	0
5	NAME Garrison 1	OpC	05 38 42	-02 36.0						~	538	0
6	* sig Ori C	Y*?	05 38 44.1189397296	-02 36 06.310060884		8.77	8.79		9.63	A2Vn	28	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)	779	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	56	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	441	0
11	NGC 3603	OpC	11 15 11	-61 15.5						~	1032	1

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