Hubble Space Telescope Fine Guidance Sensor interferometric observations of the core of 30 doradus

Details Hubble Space Telescope Fine Guidance Sensor interferometric observations of the core of 30 doradus Hubble Space Telescope Fine Guidance Sensor interferometric observations of the core of 30 doradus

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...427l..21l&link_type=abstract

Astrophysical Journal, Part 2 - Letters, vol. 427, no. 1, p. L21-L24

Astronomy and Astrophysics

Astrophysics

14

Angular Resolution, Astronomical Interferometry, Astrophysics, Early Stars, Guidance Sensors, Magellanic Clouds, Star Clusters, Stellar Luminosity, Stellar Mass, Wolf-Rayet Stars, Hubble Space Telescope, Photomultiplier Tubes, Scanning, Signal To Noise Ratios

Scientific paper

We present the results of the first high angular resolution observations taken with a Fine Guidance Sensor (FGS) aboard the Hubble Space Telescope (HST) of a star cluster embedded in very bright background. The strong and complex background around the R136 cluster in the 30 Dor nebula does not prevent the FGS from achieving performance close to its angular resolution limit of approximately 0.015 sec per axis with reliable photometry. These FGS observations establish that the central object in R136a is a triple star with the third component delta V = 1.1 mag fainter than the primary star al approximately 0.08 sec way. We estimate from the grid of models of Maeder (1990) that the present mass of al is between 30 and 80 solar masses, with the main-sequence progenitor between 60 and 120 solar masses.

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