2001A&A...368..239V


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.01CET21:40:54

2001A&A...368..239V - Astronomy and Astrophysics, volume 368, 239-249 (2001/3-2)

The peculiar cluster HS 327 in the Large Magellanic Cloud: can OH/IR stars and carbon stars be twins?

VAN LOON J.T., ZIJLSTRA A.A., KAPER L., GILMORE G.F., LOUP C. and BLOMMAERT J.A.D.L.

Abstract (from CDS):

The obscured OH/IR star IRAS 05298-6957 in the LMC was recently noticed to be member of the small double cluster HS 327 that also contains a carbon star (van Loon, et al., 1998A&A...329..169V). Hence they are coeval and have (nearly) the same progenitor mass, which can only be understood if Hot Bottom Burning (HBB) has prevented IRAS 05298-6957 from being a carbon star. We present extensive visual and near-IR photometric data for >104 stars in and around HS 327, and spectroscopic data for some of the brightest AGB stars amongst these. Colour-magnitude diagrams are used to estimate the age for the cluster and its members, and luminosities are derived for the stars for which spectra have been obtained. The age for IRAS 05298-6957 and the carbon star is estimated to be ∼200Myr. This corresponds to a Main-Sequence progenitor mass ∼4.0M - the first direct measurement of the lower mass threshold for HBB. This agrees with stellar evolution models that, however, fail to reproduce the low luminosity of the carbon star.

Abstract Copyright:

Journal keyword(s): stars: carbon - stars: evolution - stars: AGB and post-AGB - open clusters and associations: general - Magellanic Clouds - infrared: stars

Nomenclature: Text: [VZK2001] HS 327W (Nos E, W). Tables 1, 2: [VZK2001] A (Nos A-C), [VZK2001] Carbon N=1, [VZK2001] Red N=1.

CDS comments: Standard star S 121-E = GSPC S121-E

Simbad objects: 19

goto Full paper

goto View the reference in ADS

Number of rows : 19

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-28 595 PM* 01 54 50.2704861570 -27 28 35.740415025   12.06 11.51     ~ 123 0
2 HD 19445 PM* 03 08 25.5884 +26 19 51.400 8.29 8.52 8.06 7.60 7.27 G2VFe-3 745 0
3 Ross 374 PM* 03 26 59.7727826880 +23 46 35.925129280   11.36   10.6   F5 72 0
4 HD 284248 PM* 04 14 35.5161833236 +22 21 04.254015290 9.49 9.68 9.23 8.77 8.43 sdG0 171 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15197 1
6 2MASS J05291132-6956150 Mi* 05 29 11.3284768913 -69 56 14.976649993     18.197 15.910 15.536 ~ 6 0
7 OGLE-CL LMC 517 Cl* 05 29 18.80 -69 54 52.5           ~ 13 0
8 2MASS J05292426-6955418 LP* 05 29 24.26 -69 55 41.8     16.581   13.910 ~ 2 0
9 KMK88 59 Cl* 05 29 24.59 -69 55 11.8           ~ 8 0
10 IRAS 05298-6957 pA* 05 29 24.61 -69 55 14.2           ~ 37 0
11 OGLE LMC-LPV-61819 s*r 05 29 25.0014799094 -69 56 26.069429766     16.336 13.124 12.984 M5Iab-Ib 5 0
12 2MASS J05292546-6954523 LP* 05 29 25.46 -69 54 52.3     16.280 13.954 13.86 C4.5 5 0
13 2MASS J05293634-6956060 LP* 05 29 36.35 -69 56 06.1     17.350 14.317 14.147 ~ 3 0
14 SHV 0530080-695949 Mi* 05 29 40.35 -69 57 37.5     19.019 15.484 15.856 C 8 0
15 GSPC S121-E * 06 29 29.4 -59 39 31           ~ 10 0
16 Ross 683 PM* 08 50 27.4107694450 +07 37 17.312399611   12.06   11.1   G6 68 1
17 Ross 889 Pe* 09 40 43.2053386236 +01 00 29.514872822       10.39   sdA4 156 0
18 CD-44 12736 PM* 18 36 25.9487430436 -44 18 36.919462094   10.83 10.22     G0 199 0
19 BD-00 4470 Pe* 23 09 32.9438722600 +00 42 39.756464995   10.66   9.6   sdG2 91 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2001A&A...368..239V and select 'bookmark this link' or equivalent in the popup menu


2021.03.01-21:40:54

© Université de Strasbourg/CNRS

    • Contact