1998A&A...336..654K


Query : 1998A&A...336..654K

1998A&A...336..654K - Astronomy and Astrophysics, volume 336, 654-661 (1998/8-2)

Irregular variables of type Lb. Circumstellar CO emission of an oxygen-rich sample.

KERSCHBAUM F. and OLOFSSON H.

Abstract (from CDS):

We report on the first systematic study of the mass-loss properties of O-rich irregular variables of type Lb. 12CO(J=1-0, 2-1, and 3-2) line observations were carried out using the SEST, the Onsala 20m TELESCOPE, the JCMT and the IRAM 30m ANTENNA. In total 20 stars were detected among the 31 objects observed (all are new detections; in three cases detections are precluded because of strong interference from interstellar CO emission). Hence, the detection rate is very high for this sample selected on the basis of the 60µm flux strength. The majority of the detected objects are weak in CO, and the inferred mass-loss rates are low (≲10–7M/yr). They have, with only a few exceptions, envelopes with small gas expansion velocities (the mean value is ≃8km/s). We find that their mass-loss properties are very similar to those of bright O-rich semiregular (SRa or SRb) and Mira variables, i.e., at least in this mass-loss rate range the stellar mass-loss properties are not strongly influenced by the pulsational behaviour of the star.

Abstract Copyright:

Journal keyword(s): stars: variables - stars: AGB - stars: circumstellar matter - stars: mass-loss - radio lines: stars

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* CE And LP* 01 29 33.2705595168 +46 39 33.032270376   11.65 10.13     M5 24 0
2 V* EX Ori LP* 05 24 28.8521590104 -06 08 49.823290896   11.19 9.98     M7III: 34 1
3 V* V352 Ori LP* 06 01 46.9216393272 -02 21 13.548749112   9.384 8.970 7.529   M6III 30 0
4 V* DW Gem LP* 06 30 59.8442391768 +27 27 07.548412320   10.81 9.69     M8 30 0
5 V* FZ Hya LP* 08 21 33.3029607696 +04 57 30.246288984   10.01 9.078 8.799   M 27 0
6 V* OT Pup LP* 08 22 11.1335867256 -25 37 54.592461696   10.12 8.54     M5/6III 20 0
7 V* FK Hya LP* 08 24 27.8559201312 -08 31 12.644608908   8.93 7.63     M6III 36 0
8 V* CW Cnc LP* 09 08 26.5433288712 +13 13 13.597473180   10.23 9.15     M6 50 0
9 V* CT UMa LP* 10 34 17.4246456072 +69 45 52.073846604   11.41 10.25     M6 16 0
10 V* CS Dra LP* 11 15 55.9095407256 +75 08 34.579113936   12.19 10.62     M5 28 0
11 V* AZ UMa LP* 11 47 13.8036159360 +43 28 15.933812664   10.02 8.74     M6III 47 0
12 V* RW Vir LP* 12 07 14.9021005464 -06 45 56.074133880   8.60 7.18     M5II 42 0
13 V* TY Dra LP* 17 37 00.1116207432 +57 44 25.309145436   10.61 9.30     M8 51 0
14 V* TU Lyr LP* 18 20 30.2775855816 +31 45 21.245761908   11.38 10.13     M6-7e 29 0
15 V* CZ Ser LP* 18 37 20.9853608496 -02 39 14.835790260   12.59 10.49     M6 21 0
16 V* YZ Lyr LP* 19 03 25.4355428976 +29 08 50.658545796   12.89 11.74     M1 10 0
17 V* SZ Dra LP* 19 10 02.3380219488 +66 06 09.977499936   9.87 8.51     M5III 31 0
18 V* V1943 Sgr AB* 20 06 55.2441583872 -27 13 29.766501516   9.25 8.04     M7/8III 72 0
19 V* V584 Aql LP* 20 10 29.8266386760 -01 37 40.821495780   10.55 9.19     M4(III) 28 0
20 V* Y Tel LP* 20 20 14.2802825256 -50 42 11.475315036   10.45 9.35     M7III 21 0
21 V* TZ Aql LP* 20 30 18.4683740184 -04 45 16.658885304   10.06 8.70     M6III 30 0
22 V* V397 Cyg LP* 20 32 11.1800937696 +35 27 26.638360344   11.41 11.41     M7 15 0
23 V* FI Vul LP* 20 48 51.1881931656 +22 59 38.957906976   8.94 7.67     M3 25 0
24 V* IN Vul LP* 20 53 21.9512601984 +25 34 59.816971308   12.29 10.90     M7 12 0
25 V* AB Aqr LP* 22 38 34.6193737921 -14 02 14.421085011   10.50 9.23     M7 29 0
26 V* BC And LP* 23 00 53.0743339320 +46 30 38.117782080   10.52 9.11     M7III: 18 0
27 V* V352 Cep LP* 23 01 27.0677546520 +61 33 50.380309836   10.60 8.96     M6 16 0
28 V* AS Cep s*r 23 02 05.2113146664 +59 49 06.206697048   12.65 9.99     M3I 25 0
29 V* CF And LP* 23 03 43.8128871096 +37 51 13.618821852   9.74 8.23     M7 17 0
30 V* SV Aqr LP* 23 22 45.3630843744 -10 49 00.064750908   10.91 9.83     M8 30 0
31 V* V530 Cas LP* 23 30 44.1075128136 +60 15 20.765082204   14.22 10.97     M4Ib 27 0

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2022.05.20-20:01:57

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