2009A&A...508.1391G


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.27CET00:32:01

2009A&A...508.1391G - Astronomy and Astrophysics, volume 508, 1391-1402 (2009/12-4)

Chemical depletion in the Large Magellanic Cloud: RV Tauri stars and the photospheric feedback from their dusty discs.

GIELEN C., VAN WINCKEL H., REYNIERS M., ZIJLSTRA A., LLOYD EVANS T., GORDON K.D., KEMPER F., INDEBETOUW R., MARENGO M., MATSUURA M., MEIXNER M., SLOAN G.C., TIELENS A.G.G.M. and WOODS P.M.

Abstract (from CDS):

By studying the photospheric abundances of 4 RV Tauri stars in the LMC, we test whether the depletion pattern of refractory elements, seen in similar Galactic sources, is also common for extragalactic sources. Since this depletion process probably only occurs through interaction with a stable disc, we investigate the circumstellar environment of these sources. A detailed photospheric abundance study was performed using high-resolution UVES optical spectra. To study the circumstellar environment we use photometric data to construct the spectral energy distributions of the stars, and determine the geometry of the circumstellar environment, whereas low-resolution Spitzer-IRS infrared spectra are used to trace its mineralogy. Our results show that, also in the LMC, the photospheres of RV Tauri stars are commonly affected by the depletion process, although it can differ significantly in strength from source to source. From our detailed disc modelling and mineralogy study, we find that this process, as in the Galaxy, appears closely related to the presence of a stable Keplerian disc. The newly studied extragalactic objects have similar observational characteristics as Galactic post-AGB binaries surrounded by a dusty disc, and are therefore also believed to be part of a binary system. One source shows a very small infrared excess, atypical for a disc source, but still has evidence for depletion. We speculate this could point to the presence of a very evolved disc, similar to debris discs seen around young stellar objects.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: AGB and post-AGB - circumstellar matter - binaries: general - Magellanic Clouds

Errata: +corrigendum vol. 515, p. C2 (2010)

Simbad objects: 16

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Number of rows : 16

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 [JSD2015] AP 3524 GlC 00 42 58.1210704440 +41 16 52.731456552 19.37   17.54 16.600 16.50 ~ 21 0
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5451 1
3 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 794 2
4 OGLE LMC-T2CEP-15 RV* 04 55 43.2642447535 -67 51 09.787236567 17.31 16.23 14.93 14.28 14.061 G2-8(R)Ibe: 26 0
5 SV* HV 915 RV* 05 14 18.1109733051 -69 12 34.870585607 15.837 14.924 14.552 13.96 13.853 F7-9Ibpe 25 0
6 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14476 1
7 OGLE LMC-T2CEP-147 RV* 05 31 50.9980983316 -69 11 46.357793059 14.745 14.781 14.299 14.03 13.862 F4-G1Ibpe 20 0
8 OGLE LMC-T2CEP-149 RV* 05 32 54.4533319800 -69 35 13.106471959     14.868   14.151 ~ 12 0
9 OGLE LMC-T2CEP-174 RV* 05 40 00.4968772621 -69 42 14.653872184 14.745 14.781 14.457 13.380 13.693 F0Ia 15 0
10 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 709 0
11 HD 233517 * 08 22 46.7144627395 +53 04 49.232441095   10.85 9.71     K2 78 0
12 HD 89353 pA* 10 18 07.5892879413 -28 59 31.194541133   5.76 5.53     B9.5Ib/II 286 0
13 V* W Vir WV* 13 26 01.9928122043 -03 22 43.429880244   10.33 9.46 9.29 9.393 F2Ibe 280 0
14 IRAS 16279-4757 pA* 16 31 38.7378047645 -48 04 05.640499647           M3II 39 0
15 NAME Water Lily Nebula pA* 17 03 10.0710345261 -47 00 27.733590141           B7 82 0
16 V* AC Her pA* 18 30 16.2374666779 +21 52 00.618442618 8.00 7.79 7.01     F4Ibp 315 0

    Equat.    Gal    SGal    Ecl

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2020.01.27-00:32:01

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