2001A&A...368.1006C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET07:11:00

2001A&A...368.1006C - Astronomy and Astrophysics, volume 368, 1006-1020 (2001/3-4)

Properties of OH/IR stars with IRAS LRS spectra.

CHEN P.S., SZCZERBA R., KWOK S. and VOLK K.

Abstract (from CDS):

1858 OH satellite line (1612MHz) maser sources associated with the IRAS counterparts were assembled from the literature. Cross-correlation between collected OH/IR - IRAS sources and the recent catalogue of the IRAS LRS spectra (Kwok et al., 1997ApJS..112..557K) allows us to subdivide 1024 of them (after excluding OH sources with uncertain IRAS associations) into 10 groups according to the Volk & Cohen (1989AJ.....98..931V) classification scheme. We have found that sources with silicate emission form the largest group (about 57%), followed by the group with silicate absorption (only about 16%). For more sensitive individual OH maser surveys these numbers differentiate even more and the ratio between silicate emission and absorption sources reaches a value close to 6. Surprisingly, we found an association of OH maser emission with a small number of stars with carbon-rich atmospheres. The distribution of these subgroups of OH/IR stars in the IRAS colour-colour and the period-colour diagrams as well as histograms of some physical properties are presented. The galactic distribution of important parameters (periods, IRAS colours, expansion and stellar velocities) for different classes of OH/IR sources is analyzed from the point of view of the stars' evolutionary status. The correlations among the periods, colours, expansion and star velocities and the pumping efficiencies for selected subgroups of OH/IR stars are also investigated. These analyses allow us to demonstrate that a significant fraction of silicate emission group sources do not form an evolutionary sequence with the silicate absorption objects - as is suggested e.g. by the IRAS colour-colour diagram, but rather form a lower initial mass sequence, i.e. these sources will never develop sufficient mass loss to manifest silicate absorption.

Abstract Copyright:

Journal keyword(s): masers - astronomical data bases: miscellaneous - stars: AGB and post-AGB - matter circumstellar

VizieR on-line data: <Available at CDS (J/A+A/368/1006): refs.dat table1.dat>

Simbad objects: 26

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Number of rows : 26

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 Case 720 C* 04 16 24.2210837837 +39 25 45.161869224       13.47   C 20 0
2 V* V1187 Ori C* 05 39 42.6265269459 -08 09 08.632589460     12     C 30 0
3 PN Vo 1 PN 06 59 26.4078328215 -79 38 47.129323563   16.7 15.8     [WC10] 94 0
4 OH 231.8 +4.2 OH* 07 42 16.947 -14 42 50.20           M10III+A 506 1
5 IRAS 08304-4313 C* 08 32 09.915 -43 23 33.60           C-rich 13 0
6 IRAS 17347-3139 PN 17 38 00.61 -31 40 55.2           ~ 55 1
7 IRAS 17371-3021 C* 17 40 20.858 -30 22 57.64           C-rich 23 0
8 GAL 359.977+00.168 Y*O 17 44 53.4 -28 52 20           ~ 23 0
9 OH 0.3 -0.2 OH* 17 47 06.947 -28 44 41.91           ~ 75 1
10 LBN 3 HII 17 47 08.0 -28 46 30           ~ 82 3
11 IRAS 17439-2845 mul 17 47 08.6 -28 46 18           ~ 85 0
12 [RHI84] 10-712 OH* 17 49 09.8468558554 -30 58 17.634688020     16.40     M7 12 0
13 GAL 005.88-00.41 HII 18 00 30.388 -24 04 00.20           ~ 301 0
14 IRAS 18092-1742 HII 18 12 12.2 -17 41 55           ~ 19 0
15 OH 15.7 +0.8 OH* 18 16 25.376 -14 55 15.66           ~ 72 0
16 IRC -10414 s*r 18 23 17.9089752940 -13 42 47.110208529       11.15   M7I 71 0
17 OH 17.7 -2.0 pA* 18 30 30.703 -14 28 57.04           ~ 135 1
18 V* V840 Aql LP* 18 57 18.3400632943 +06 41 53.407998379   11.2 9.42     M7 10 0
19 RAFGL 2287 mul 18 57 36.5 +03 27 24           ~ 22 0
20 HD 184738 PN 19 34 45.2337512278 +30 30 58.951476338   10.41 10.44     [WC9] 922 0
21 Min 1-92 pA* 19 36 18.9292148675 +29 32 49.838032394 12.13 12.35 11.75 11.54   B0.5IV[e] 236 1
22 IRAS 20149+3440 OH* 20 16 50.5561386053 +34 49 26.885836623           ~ 14 0
23 WSRTGP 2025+3712 HII 20 27 26.4 +37 22 48           ~ 48 0
24 NAME SH 2-106 IR Y*O 20 27 26.502 +37 22 42.03           ~ 157 1
25 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 635 2
26 IRAS 22176+6303 Y*O 22 19 17.978 +63 18 52.92           ~ 590 0

    Equat.    Gal    SGal    Ecl

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2020.10.28-07:11:00

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