2001A&A...366..972S


Query : 2001A&A...366..972S

2001A&A...366..972S - Astronomy and Astrophysics, volume 366, 972-980 (2001/2-2)

High resolution spectroscopy of symbiotic stars. VI. Orbital and stellar parameters for AR Pavonis.

SCHILD H., DUMM T., MUERSET U., NUSSBAUMER H., SCHMID H.M. and SCHMUTZ W.

Abstract (from CDS):

We present new dynamical parameters of the AR Pav binary system. Our observations consist of a series of high resolution optical/NIR spectra from which we derive the radial velocity curve of the red giant as well as its rotation velocity. Assuming co-rotation, we determine the stellar radius (130R) of the red giant. Based on this we derive the red giant's luminosity and mass (2.0M) as well as the distance of the system (4.9kpc). The binary mass function finally yields the companion's mass (0.75M) and the binary separation (1.95AU). We find that the red giant does not fill its Roche lobe. We review the radial velocity data of Thackeray & Hutchings (1974MNRAS.167..319T), and compare it with our red giant's orbit. We find that their RV curves of the blue absorption system and the permitted emission lines are in anti-phase with the red giant, and that the forbidden emission lines are shifted by a quarter of a period. The blue absorptions and the permitted emission lines are associated with the hot companion but not in a straightforward way. The blue absorption system only tracks the hot component's orbital motion whilst it is in front of the red giant, whereas at other phases line blanketing by interbinary material leads to perturbations. We finally present UV light curves based on IUE archive spectra. We clearly detect eclipses in the continuum at all wavelengths. The eclipse light curves are unusual in that they show a slow and gradual decline prior to eclipse which is followed by a sharp increase after eclipse.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - binaries: symbiotic - stars: fundamental parameters - stars: individual: AR Pav - accretion, accretion disks

Simbad objects: 14

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Number of rows : 14
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* EG And Sy* 00 44 37.1876042586 +40 40 45.703033630 10.54 8.93 7.22     M2.4III 271 0
2 V* AX Per Sy* 01 36 22.6996835649 +54 15 02.411289057   11.45 10.67 11.04   M3IIIep+A0 280 1
3 V* AG Per A SB* 04 06 55.828400 +33 26 46.92224   6.83 6.87     ~ 255 0
4 V* AG Per EB* 04 06 55.8351101323 +33 26 47.009585515       7.71   B3Vn 262 0
5 V* BX Mon Sy* 07 25 22.7618908461 -03 35 50.641920234   12.27 11.24 10.92   M5/6IIIe 107 1
6 V* SY Mus Sy* 11 32 09.9958009466 -65 25 11.458645897   11.97 10.20     M4 159 0
7 * gam Cru PM* 12 31 09.95961 -57 06 47.5684 5.01 3.23 1.64 -0.02 -1.44 M3.5III 267 0
8 V* RW Hya Sy* 13 34 18.1290422733 -25 22 48.885732567   11.51 10.00     M1/2IIIe 191 0
9 V* FG Ser Sy* 18 15 07.1024604258 -00 18 52.284453619     11.87     M3e 109 0
10 V* AR Pav EB* 18 20 27.8818737427 -66 04 42.931712420   11.36 7.40     B1 146 0
11 * alf Sct PM* 18 35 12.4277636 -08 14 38.652893 6.70 5.17 3.83 2.86 2.18 K3III 175 0
12 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1142 1
13 CD-43 14304 Sy* 21 00 06.3577224043 -42 38 44.938778022     11.0     K7e 54 0
14 * 55 Peg V* 23 07 00.2589864288 +09 24 34.174103756 8.020 6.080 4.520 3.25 2.23 M1IIIab 132 0

    Equat.    Gal    SGal    Ecl

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2021.07.28-17:26:34

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