2012A&A...545L..10W


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET12:14:05

2012A&A...545L..10W - Astronomy and Astrophysics, volume 545, L10-10 (2012/9-1)

AMBER/VLTI observations of the B[e] star MWC 300.

WANG Y., WEIGELT G., KREPLIN A., HOFMANN K.-H., KRAUS S., MIROSHNICHENKO A.S., SCHERTL D., CHELLI A., DOMICIANO DE SOUZA A., MASSI F. and ROBBE-DUBOIS S.

Abstract (from CDS):

We study the enigmatic B[e] star MWC300 to investigate its disk and binary with milli-arcsecond-scale angular resolution. We observed MWC300 with the VLTI/AMBER instrument in the H and K bands and compared these observations with temperature-gradient models to derive model parameters. The measured low visibility values, wavelength dependence of the visibilities, and wavelength dependence of the closure phase directly suggest that MWC300 consists of a resolved disk and a close binary. We present a model consisting of a binary and a temperature-gradient disk that is able to reproduce the visibilities, closure phases, and spectral energy distribution. This model allows us to constrain the projected binary separation (∼4.4mas or ∼7.9AU), the flux ratio of the binary components (∼2.2), the disk temperature power-law index, and other parameters.

Abstract Copyright:

Journal keyword(s): stars: individual: MWC 300 - binaries: general - circumstellar matter - techniques: interferometric

Simbad objects: 8

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Number of rows : 8

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 * l Pup sg* 07 43 48.4687222 -28 57 17.372015 4.06 4.09 3.93 3.68 3.50 A4Iabe 178 0
2 HD 87643 Or* 10 04 30.2845136666 -58 39 52.138769673 8.92 10.38 9.50 9.68   B3I[e] 136 0
3 * eta Car Em* 10 45 03.5455050 -59 41 03.951060 6.37 7.034 6.21 4.90 4.41 OBepec 2255 0
4 * rho Sco SB* 15 56 53.0762391 -29 12 50.661185 2.84 3.66 3.86 3.97 4.17 B2IV-V 190 0
5 CD-42 11721 Be* 16 59 06.7622892572 -42 42 08.404916931 12.16 12.28 11.00     B0IVe 156 1
6 HD 327083 s*b 17 15 15.3714469957 -40 20 06.793634106 12.07 11.44 10.00 9.64   B6Ieq 54 0
7 EM* MWC 300 Ae* 18 29 25.6915000349 -06 04 37.289920628 12.55 12.67 13.795     B1Ia+[e] 129 0
8 EM* MWC 349A * 20 32 45.5290328485 +40 39 36.647044678           ~ 149 0

    Equat.    Gal    SGal    Ecl

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2021.03.05-12:14:05

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