2003A&A...412..405Y


Query : 2003A&A...412..405Y

2003A&A...412..405Y - Astronomy and Astrophysics, volume 412, 405-416 (2003/12-3)

Polarimetry of evolved stars. III. RV Tau and R CrB stars.

YUDIN R.V., EVANS A., BARRETT P., ALBINSON J.S., DAVIES J.K. and HUTCHINSON M.G.

Abstract (from CDS):

We present broadband optical polarimetry, and broadband optical and infrared photometry, of eight RV Tau-type and five R CrB-type stars; much of the photometry and polarimetry was obtained simultaneously. For nine of the objects polarimetric data is reported for the first time. We have estimated and subtracted the interstellar component of polarization, allowing us to determine the level of intrinsic polarization. In some cases this is ≃1%-2% even when the star is in a bright photometric state. We consider this to be evidence for the presence of permanent clumpy non-spherical dust shells around the RV Tau and R CrB-type stars we observed. Our polarimetric and photometric data lead us to conclude that, for most of our programme stars, neutral extinction must be significant in their circumstellar envelopes. Apart from the brightness variations due to pulsations and changes in the effective temperature of stars, there is clear evidence of wavelength-independent flux variations - with amplitude from 0.5mag to 1.0mag - implying the presence of large (a>0.15µm) dust particles. Rapid (∼2-hours) evolution of the infrared flux distribution at the level of ∼0.6mag in the JHKL bands was detected in the RV Tau star R Sct.

Abstract Copyright:

Journal keyword(s): polarization - stars: circumstellar matter - stars: variable: general

VizieR on-line data: ***Tables never received at CDS***

Simbad objects: 21

goto Full paper

goto View the references in ADS

Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 V* TW Cam pA* 04 20 47.6363454312 +57 26 28.522779504 12.12 11.42 10.08 9.29   G8Ib 71 0
2 V* SS Gem RV* 06 08 35.1092051400 +22 37 01.988942124 10.42 9.71 8.67     G2/5I 68 0
3 V* U Mon RV* 07 30 47.4711645432 -09 46 36.757477488 8.22 7.00 5.82     G8/K0Ib/II 206 0
4 V* AR Pup pA* 08 03 01.6516600440 -36 35 47.949428976   10.25 9.55     Rpec 86 0
5 V* RU Cen pA* 12 09 23.8148403768 -45 25 34.801333356   9.81 8.70     G1Ie 96 1
6 V* SX Cen RV* 12 21 12.5736554208 -49 12 41.058679536   10.11 9.60     B5III 68 0
7 V* UW Cen RC* 12 43 17.1901954368 -54 31 40.763998596   10.84 10.13     K 115 0
8 V* DY Cen RC* 13 25 34.0847063328 -54 14 43.129581792     12.00     C-Hd/B5-6Ie 96 0
9 V* BU Cen RV* 13 29 36.7407856656 -50 00 05.430320676   11.829 12.40     ~ 18 0
10 V* V854 Cen RC* 14 34 49.4024471640 -39 33 19.201288284   7.13 11.69     Ce 208 0
11 V* R CrB RC* 15 48 34.4154827352 +28 09 24.295852440 6.44 6.31 5.71 5.26 5.08 G0Iep 779 0
12 V* UY Ara pA* 17 29 28.9495380096 -59 54 02.183763204   11.86 10.98 10.97   ~ 25 1
13 V* AI Sco RV* 17 56 18.5781588120 -33 48 43.278508116   10.99 9.98     G5 47 0
14 V* AC Her RV* 18 30 16.2373118976 +21 52 00.599340000 8.00 7.79 7.01     F4Ibp 340 0
15 V* R Sct cC* 18 47 28.9498974024 -05 42 18.542611800 8.30 6.67 5.20 4.14 3.37 K4/5pec 319 0
16 V* RY Sgr RC* 19 16 32.7668605944 -33 31 20.340212592 6.20 6.27 6.25     Cpec 363 0
17 V* V1711 Sgr RV* 20 01 07.9860343992 -30 30 38.905165224   11.31 10.62 10.51   F6CH+2 47 0
18 V* R Sge RV* 20 14 03.7432133928 +16 43 35.030552844   10.17 9.20     G8Ib 81 0
19 V* V Vul RV* 20 36 32.0211817128 +26 36 14.499788940   9.68 8.05     K0 81 0
20 V* U Aqr RC* 22 03 19.6990459464 -16 37 35.281076700   12.16 11.17     C-Hd 99 0
21 V* DS Aqr RV* 22 53 17.0396657784 -18 35 30.976363752 11.88 11.62 11.08     F2II 38 0

To bookmark this query, right click on this link: simbad:objects in 2003A&A...412..405Y and select 'bookmark this link' or equivalent in the popup menu