2003A&A...408..305M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST14:33:59

2003A&A...408..305M - Astronomy and Astrophysics, volume 408, 305-311 (2003/9-2)

Spectroscopy of the growing circumstellar disk in the δ Scorpii Be binary.

MIROSHNICHENKO A.S., BJORKMAN K.S., MORRISON N.D., WISNIEWSKI J.P., MANSET N., LEVATO H., GROSSO M., POLLMANN E., BUIL C. and KNAUTH D.C.

Abstract (from CDS):

We present the results of a spectroscopic monitoring program of the binary system δ Scorpii, whose primary became a Be star after the last periastron encounter in the Summer of 2000. The observations cover a period of 2 years (March 2001-June 2003) and are a continuation of our previous campaign reported in Miroshnichenko et al. (2001A&A...377..485M). We found that the emission-line spectrum was gradually strengthening over the whole monitoring period. Several short-term increases of the line emission, possibly due to outbursts of matter ejected from the stellar surface, were detected. The outbursts seem to be responsible for the brightness fadings, seen afterwards. We attempt to explain the overall observed line and continuum behaviour in terms of a circumstellar disk, growing in density and size. The disk is most likely Keplerian with an outer radius of ∼10R* and a mean expansion speed of ∼0.4km/s.

Abstract Copyright:

Journal keyword(s): techniques: spectroscopic - stars: circumstellar matter - stars: individual: δ Scorpii - stars: binaries: spectroscopic - stars: Be stars

VizieR on-line data: <Available at CDS (J/A+A/408/305): table1.dat table2.dat>

Simbad objects: 5

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Number of rows : 5

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 * gam Cas Be* 00 56 42.5317 +60 43 00.265 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1151 2
2 * mu. Cen Be* 13 49 36.9886294 -42 28 25.429594 2.37 3.27 3.43 3.41 3.50 B2Vnpe 416 0
3 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 702 0
4 * 60 Cyg Be* 21 01 10.9277825432 +46 09 20.792180714 4.23 5.226 5.432     B1Ve 181 0
5 * pi. Aqr Be* 22 25 16.6228499 +01 22 38.634579 3.64 4.60 4.64 4.48 4.48 B1III-IVe 390 0

    Equat.    Gal    SGal    Ecl

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2021.04.16-14:33:59

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