2016ApJ...833..286H


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.31CEST16:07:25

2016ApJ...833..286H - Astrophys. J., 833, 286-286 (2016/December-3)

A profile analysis of raman-scattered O VI bands at 6825 Å and 7082 Å in Sanduleak's star.

HEO J.-E., ANGELONI R., DI MILLE F., PALMA T. and LEE H.-W.

Abstract (from CDS):

We present a detailed modeling of the two broad bands observed at 6825 and 7082 Å in Sanduleak's star, a controversial object in the Large Magellanic Cloud. These bands are known to originate from Raman scattering of O VI λλ 1032 and 1038 photons with atomic hydrogen and are only observed in bona fide symbiotic stars. Our high-resolution spectrum obtained with the Magellan Inamori Kyocera Echelle spectrograph at the Magellan-Clay Telescope reveals, quite surprisingly, that the profiles of the two bands look very different: while the Raman 6825 A band shows a single broad profile with a redward extended bump, the Raman 7082 A band exhibits a distinct triple-peak profile. Our model suggests that the O vi emission nebula can be decomposed into a red, blue, and central emission region from an accretion disk, a bipolar outflow, and a further compact, optically thick region. We also perform Monte Carlo simulations with the aim of fitting the observed flux ratio F(6825)/F(7082) ∼ 4.5, which indicates that the neutral region in Sanduleak's star is characterized by the column density N_H i_ ∼ 1 x 1023 cm–2.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: symbiotic - line: profiles - radiative transfer - scattering - stars: individual: Sanduleak's star - stars: individual: Sanduleak's star

Status at CDS:  

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* EG And Sy* 00 44 37.1876042586 +40 40 45.703033630 10.54 8.93 7.22     M2.4III 263 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14614 1
3 NAME Sanduleak's Star Sy* 05 45 19.569 -71 16 06.72 16.855 17.413 17.055 15.69 16.957 ~ 48 0
4 V* RS Oph No* 17 50 13.1592776879 -06 42 28.481553668   12.29 4.30     OB+M2ep 918 0
5 V* HM Sge Sy* 19 41 57.0758884476 +16 44 39.856454738   12.38 11.10     M7 433 1
6 V* CI Cyg Al* 19 50 11.8344401438 +35 41 03.000692799   11.97 9.90     Bep+M5III 403 0
7 EM* AS 373 Sy* 19 57 05.0184580246 +39 49 36.085051314         10.592 M6/8e 566 0

    Equat.    Gal    SGal    Ecl

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2020.03.31-16:07:25

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