2006A&A...458..533J


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.20CEST20:05:54

2006A&A...458..533J - Astronomy and Astrophysics, volume 458, 533-539 (2006/11-1)

Near-IR variability properties of a selected sample of AGB stars.

JIMENEZ-ESTEBAN F.M., GARCIA-LARIO P., ENGELS D. and MANCHADO A.

Abstract (from CDS):

We present the results of a near-infrared monitoring programme of a selected sample of stars, initially suspected to be Mira variables and OH/IR stars, covering more than a decade of observations. The objects monitored cover the typical range of IRAS colours shown by O-rich stars on the asymptotic giant branch and show a surprisingly large diversity of variability properties. Sixteen objects are confirmed as large-amplitude variables. Periods between 360 and 1800d and typical amplitudes 1m≲ΔK≲2m could be determined for nine of them. In three light curves, we find a systematic decrease in the mean brightness, and two light curves show pronounced asymmetry. One source, IRAS07222-2005, shows infrared colours typical of Mira variables, but it pulsates with a much longer period (≃1200d) than a normal Mira. Two objects are either close to (IRAS03293+6010) or probably in (IRAS18299-1705) the post-AGB phase. In IRAS16029-3041 we found a systematic increase in the H-K colour of ≃1m, which we interpret as evidence of a recent episode of enhanced mass loss. IRAS18576+0341, a heavily obscured luminous blue variable was also monitored. The star showed a continued decrease in brightness over a period of 7 years (1995-2002).

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: late-type - stars: variables: general - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/458/533): stars.dat tablea.dat>

Simbad objects: 24

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Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 CD-24 945 * 02 11 48.0115962388 -23 41 43.798976426   11.25 10.25     M6 8 0
2 OH 141.7 +3.5 Mi* 03 33 30.6184797306 +60 20 08.850237093           ~ 57 0
3 Case 720 C* 04 16 24.2210837837 +39 25 45.161869224       13.47   C 21 0
4 RAFGL 712 OH* 05 16 47.474 +45 34 04.14           O-rich 29 1
5 IRC +40156 OH* 06 33 15.7579945892 +40 42 51.036144135           M8 70 0
6 IRAS 07222-2005 * 07 24 24.4239414946 -20 11 56.087791598         12.26 M9: 8 0
7 V* V1012 Her Mi* 16 05 28.8975098573 +42 10 29.500104454           M8 21 0
8 RAFGL 1822 OH* 16 06 08.363 -30 49 33.99           ~ 51 0
9 IRAS 16437-3140 OH* 16 46 58.9 -31 46 14           ~ 8 0
10 IRAS 17103-0559 Mi* 17 12 58.1217807853 -06 02 56.921763756         11.63 O-rich 16 0
11 IRAS 17105-2804 LP? 17 13 42.0032962965 -28 07 49.961000596           ~ 8 0
12 IRAS 17313-1531 Mas 17 34 10.80 -15 33 02.0           ~ 15 0
13 IRAS 17347-3139 PN 17 38 00.61 -31 40 55.2           ~ 55 1
14 RAFGL 5379 OH* 17 44 24.0038735481 -31 55 35.428622508           ~ 83 0
15 IRC -20427 s*r 18 05 35.4932917859 -21 13 42.219485368     12 10.46   M3/4I 33 0
16 IRAS 18299-1705 MIR 18 32 50.1 -17 02 45           ~ 8 0
17 RAFGL 2192 AB* 18 34 16.3925882330 -11 29 29.207872924         12.23 M6: 21 0
18 OH 24.7 -0.2 AB* 18 35 29.8215033336 -07 13 09.423486253           ~ 20 0
19 V* V3952 Sgr Mi* 18 45 51.3310415431 -17 17 59.657932290   12.77 11.61     M9 25 0
20 IRC -10463 * 18 48 17.5250600284 -12 22 43.151829888   13.18 11.05     M6 8 0
21 IRAS 18576+0341 s*b 19 00 10.89456 +03 45 47.1096           B8I 83 1
22 IRAS 19129+2803 AB* 19 14 59.1057171186 +28 09 13.929206971           ~ 13 0
23 V* TZ Cyg LP* 19 16 04.0620176753 +50 09 36.656286992   11.46 10.49     M6 19 0
24 BD+08 5128 * 23 51 47.8833079704 +09 03 23.157030347   11.35 10.04     M5.5 10 0

    Equat.    Gal    SGal    Ecl

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