2005A&A...435..161D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET20:38:57

2005A&A...435..161D - Astronomy and Astrophysics, volume 435, 161-166 (2005/5-3)

Strong dust processing in circumstellar discs around 6 RV Tauri stars. Are dusty RV Tauri stars all binaries ?

DE RUYTER S., VAN WINCKEL H., DOMINIK C., WATERS L.B.F.M. and DEJONGHE H.

Abstract (from CDS):

We present extended Spectral Energy Distributions (SEDs) of seven classical RV Tauri stars, using newly obtained submillimetre continuum measurements and Geneva optical photometry supplemented with literature data. The broad-band SEDs show a large IR-excess with a black-body slope at long wavelengths in six of the seven stars, R Sct being the noticeable exception. This long wavelength slope is best explained assuming the presence of a dust component of large grains in the circumstellar material. We show that the most likely distribution of the circumstellar dust around the six systems is that the dust resides in a disc. Moreover, very small outflow velocities are needed to explain the presence of dust near the sublimation temperature and we speculate that the discs are Keplerian. The structure and evolution of these compact discs are as yet not understood but a likely prerequisite for their formation is that the dusty RV Tauri stars are binaries.

Abstract Copyright:

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

Simbad objects: 11

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Number of rows : 11

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 V* TW Cam pA* 04 20 47.6362030815 +57 26 28.517663334 12.12 11.42 10.08 9.29   G8Ib 66 0
2 V* RV Tau Mi* 04 47 06.7238218181 +26 10 45.530144720   11.00 9.80     K0 268 0
3 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15216 1
4 V* SU Gem Mi* 06 14 00.0255668685 +27 42 12.183565975   11.70 10.19     F8/G0Ib 48 0
5 V* UY CMa RV* 06 18 16.3755832779 -17 02 34.675568987   11.55 10.80     G0V 39 0
6 V* U Mon RV* 07 30 47.4734611972 -09 46 36.788534824 8.22 7.00 5.82     G8/K0Ib/II 195 0
7 HD 89353 pA* 10 18 07.5892879413 -28 59 31.194541133   5.76 5.53     B9.5Ib/II 289 0
8 V* RU Cen RV* 12 09 23.8147186123 -45 25 34.813401164   9.81 8.70     G1Ie 90 0
9 V* SX Cen RV* 12 21 12.5740806517 -49 12 41.059392756   10.11 9.60     B5III 67 0
10 V* AC Her pA* 18 30 16.2374666779 +21 52 00.618442618 8.00 7.79 7.01     F4Ibp 319 0
11 V* R Sct RV* 18 47 28.9509385830 -05 42 18.537825839 8.30 6.67 5.20 4.14 3.37 K4/5pec 297 0

    Equat.    Gal    SGal    Ecl

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2021.03.08-20:38:57

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