1997A&AS..121...15H


C.D.S. - SIMBAD4 rel 1.7 - 2019.07.23CEST08:04:23

1997A&AS..121...15H - Astron. Astrophys., Suppl. Ser., 121, 15-44 (1997/January-0)

Raman scattering in symbiotic stars. II. Numerical models.

HARRIES T.J. and HOWARTH I.D.

Abstract (from CDS):

We present numerical models of Raman-line formation in symbiotic systems, based on Monte-Carlo simulations of scattering of O VI resonance-line photons from a hot source in the extended, expanding atmosphere of a cool companion, and we explore the sensitivity of the model results to the input parameters. The model successfully reproduces the observed line ratios, velocities, and polarizations, and the viewing-angle (orbital) dependence of the line strengths and polarized intensities. In principle, the position-angle dependence of the polarization in resolved Raman lines provides a diagnostic of the extent of the ionized region in symbiotic systems; however, axisymmetric geometries with `up-down' symmetry, such as we use, fail to reproduce the most commonly observed dependence of PA on velocity. Raman-line polarization morphology is shown to be a powerful probe of the conditions in the red-giant wind; this is particularly true if observations are available at different orbital phases, so that geometrical and physical variables may more easily be isolated.

Abstract Copyright:

Journal keyword(s): stars: binaries: symbiotic - stars: mass-loss - polarization

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* EG And Sy* 00 44 37.1876042586 +40 40 45.703033630 10.54 8.93 7.22     M2III:e 260 0
2 V* RX Pup Sy* 08 14 12.3036011353 -41 42 29.086820756   12.39 9.00     M5.5 188 1
3 WRAY 16-62 Sy* 09 54 43.2843108572 -57 18 52.397916164   13.77 12.92 13.01 10.93 M5-7.5 93 0
4 WRAY 16-148 Sy* 14 14 09.4122615979 -63 25 46.331710785     14.00     Me 129 1
5 WRAY 16-186 Sy* 15 47 10.5028377692 -66 29 16.070758329 13.69 12.75 11.6 13.02   K5-M6e 59 2
6 V* KX TrA Sy* 16 44 35.4675096233 -62 37 14.057715396   11.91 11.38 12.33   M6 93 1
7 EM* AS 210 Sy* 16 51 20.41 -26 00 26.7   11.5 11.9     ~ 69 1
8 EM* AS 217 Sy* 17 07 21.7347911127 -34 05 14.438321933     14.00     ~ 63 2
9 V* RT Ser No* 17 39 51.9830954180 -11 56 38.823655557     10.60     A8 122 0
10 V* RR Tel Sy* 20 04 18.5382966387 -55 43 33.154224077 9.93 11.33 10.81     WN3-6.5+M3.5-7 512 0

    Equat.    Gal    SGal    Ecl

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2019.07.23-08:04:23

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