On the distance to the new luminous blue variable WRA 751 and its variability

Details On the distance to the new luminous blue variable WRA 751 and its variability On the distance to the new luminous blue variable WRA 751 and its variability

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...258..316v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 258, no. 2, p. 316-322.

Astronomy and Astrophysics

Astrophysics

13

Astrometry, Astronomical Photometry, Blue Stars, Hertzsprung-Russell Diagram, Stellar Luminosity, Variable Stars, Interstellar Extinction, Stellar Mass Ejection, Supergiant Stars

Scientific paper

VBLUW photometry of field stars around the new LBV, WRA 751, is presented and discussed in order to determine its distance with the aid of the reddening-distance method. With a reddening for WRA 751 of E(B - V)J = 1.45-1.80 m, in which the circumstellar reddening of not greater than 0.40 m, is taken into consideration, the distance should be not less than 4-5 kpc, respectively, confirming Hu et al.'s (1990) suggestion. VBLUW photometry of WRA 751 is also presented and discussed in order to analyze its variability. This shows a light amplitude of 0.15 m with a time scale of about 30 d and superimposed short time scale variations (about a week) with amplitudes of about 0.03 m.

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