2006A&A...450.1051J

Query : 2006A&A...450.1051J

2006A&A...450.1051J - Astronomy and Astrophysics, volume 450, 1051-1059 (2006/5-2)

Near-infrared observations of water-ice in OH/IR stars.

JUSTTANONT K., OLOFSSON G., DIJKSTRA C. and MEYER A.W.

Abstract (from CDS):

A search for the near-infrared water-ice absorption band was made in a number of very red OH/IR stars which are known to exhibit the 10µm silicate absorption. As a by-product, accurate positions of these highly reddened objects are obtained. We derived a dust mass loss rate for each object by modelling the spectral energy distribution and the gas mass loss rate by solving the equation of motion for the dust drag wind. The derived mass loss rates show a strong correlation with the silicate optical depth as well as that of the water-ice. The stars have a high mass loss rate (>10^–4M_☉/yr) with an average gas-to-dust mass ratio of 110. In objects which show the 3.1 µm water-ice absorption, the near-IR slope is much steeper than those with no water-ice. Comparison between our calculated mass loss rates and those derived from OH and CO observations indicates that these stars have recently increased their mass loss rates.

Abstract Copyright: ∼

Journal keyword(s): stars: AGB and post-AGB - stars: circumstellar matter - stars: evolution - stars: late-type - stars: mass-loss - infrared: stars

Simbad objects: 25

Full paper

View the references in ADS

Number of rows : 25

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Sp type	#ref 1850 - 2023	#notes
1	OH 127.8-00.0	OH*	01 33 51.21048	+62 26 53.2032	O-rich	181	0
2	RAFGL 5379	OH*	17 44 24.0074369832	-31 55 35.414175828	O-rich	88	0
3	PN Sa 3-96	PN	17 55 45.05304	-15 03 42.8220	O-rich	44	2
4	OH 010.04-00.10	OH*	18 08 16.38432	-20 16 11.5608	O-rich	32	0
5	IRAS 18092-2347	OH*	18 12 20.42280	-23 46 55.7796	O-rich	17	0
6	IRAS 18100-1915	OH*	18 13 03.08064	-19 14 18.8700	O-rich	25	0
7	OH 016.1-00.3	OH*	18 21 06.97512	-15 03 21.6864	O-rich	47	0
8	OH 020.7+00.1	OH*	18 28 30.83160	-10 50 52.5912	O-rich	49	0
9	OH 021.5+00.5	OH*	18 28 30.93720	-09 58 14.3184	O-rich	92	0
10	IRAS 18310-2834	OH*	18 34 13.77576	-28 32 21.5988	O-rich	14	0
11	OH 024.7+00.3	OH*	18 35 29.21616	-07 13 10.9740	O-rich	37	0
12	OH 026.5+00.6	OH*	18 37 32.50920	-05 23 59.1936	O-rich	300	1
13	OH 025.5-00.3	OH*	18 38 50.54280	-06 44 49.6068	O-rich	24	0
14	IRAS 18361-0647	mul	18 38 50.7	-06 44 54	~	22	0
15	OH 030.7+00.4	OH*	18 45 52.39728	-01 46 42.4776	O-rich	68	1
16	OH 030.1-00.7	OH*	18 48 41.98728	-02 50 29.5080	O-rich	98	0
17	OH 032.0-00.5	OH*	18 51 26.25600	-01 03 52.3620	O-rich	67	0
18	OH 032.8-00.3	OH*	18 52 22.25472	-00 14 11.8428	O-rich	122	0
19	IRAS 18588+0428	OH*	19 01 20.05464	+04 32 31.5780	O-rich	16	0
20	OH 039.9-00.0	OH*	19 04 09.74928	+06 13 16.3956	O-rich	64	0
21	OH 042.3-00.1	OH*	19 09 08.32632	+08 16 33.6504	O-rich	85	0
22	OH 051.8-00.2	OH*	19 27 42.03672	+16 37 23.9520	O-rich	39	0
23	OH 065.7-00.8	OH*	19 59 39.14304	+28 23 07.2996	O-rich	33	0
24	OH 075.3-01.8	OH*	20 29 08.58696	+35 45 43.4916	O-rich	40	0
25	RAFGL 2885	OH*	22 19 27.47784	+59 51 21.7080	O-rich	135	0

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