2002A&A...387..139Q


Query : 2002A&A...387..139Q

2002A&A...387..139Q - Astronomy and Astrophysics, volume 387, 139-150 (2002/5-3)

The spectroscopic orbits and the geometrical configuration of the symbiotic binary AR Pavonis.

QUIROGA C., MIKOLAJEWSKA J., BRANDI E., FERRER O. and GARCIA L.

Abstract (from CDS):

We analyze optical and near infrared spectra of intermediate and high resolution of the eclipsing symbiotic system ARPavonis. We have obtained the radial velocity curves for the red and the hot component from the M-giant absorption lines and from the wings of Hα, Hβ and HeII λ4686 emission profiles, respectively. From the orbital elements we have derived the masses, Mg=2.5M and Mh=1.0M, for the red giant and the hot component, respectively. We also present and discuss radial velocity patterns in the blue cF absorption spectrum as well as various emission lines. In particular, we confirm that the blue absorption lines are associated with the hot component. The radial velocity curve of the blue absorption system, however, does not track the hot companion's orbital motion in a straightforward way, and its departures from an expected circular orbit are particularly strong when the hot component is active. We suggest that the cF-type absorption system is formed in material streaming from the giant presumably in a region where the stream encounters an accretion disk or an extended envelope around the hot component. The broad emission wings originate from the inner accretion disk or the envelope around the hot star. We also suggest that the central absorption in H profiles is formed in a neutral portion of the cool giant's wind which is strongly concentrated towards the orbital plane. The nebula in ARPav seems to be bounded by significant amount of neutral material in the orbital plane. The forbidden emission lines are probably formed in low density ionized regions extended in polar directions and/or the wind-wind interaction zone.

Abstract Copyright:

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

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* AX Per Sy* 01 36 22.7004366768 +54 15 02.411547480   11.45 10.67 11.04   M3IIIep+A0 284 1
2 V* RW Hya Sy* 13 34 18.1289607744 -25 22 48.881433972   11.51 10.00     M1/2IIIe 192 0
3 V* T CrB Sy* 15 59 30.1622265912 +25 55 12.613382940   11.516 10.247 9.70   M3IIIe_sh 677 0
4 EM* AS 297 Sy* 18 14 34.1920736832 +20 59 21.189578820     11.10     M2pev 140 0
5 V* AR Pav EB* 18 20 27.8820649248 -66 04 42.928979808   11.36 7.40     B1 152 0
6 EM* MWC 603 Sy* 18 22 07.8548979216 +23 27 19.934869104   12.34 11.52     M3ep+O 115 0
7 V* BF Cyg Sy* 19 23 53.5006095432 +29 40 29.177024952   10.52 9.30     Bep+M5III 269 0
8 V* CI Cyg Sy* 19 50 11.8342618008 +35 41 03.004794996   11.97 9.90     M4.9III 414 0
9 V* V1329 Cyg Sy* 20 51 01.2321742512 +35 34 54.111458316           M4IIIe 297 2

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2022.08.18-04:15:19

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