Low-frequency GMRT observations of the magnetic Bp star HR Lup (HD 133880)

S.J. George, I.R. Stevens

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We present radio observations of the magnetic chemically peculiar Bp star HR Lup (HD 133880) at 647 and 277 MHz with the GMRT. At both frequencies the source is not detected but we are able to determine upper limits to the emission. The 647 MHz limits are particularly useful, with a 5σ value of 0.45 mJy. Also, no large enhancements of the emission were seen. The non-detections, along with previously published higher frequency detections, provide evidence that an optically thick gyrosynchrotron model is the correct mechanism for the radio emission of HR Lup.
Original languageEnglish
Pages (from-to)105-111
Number of pages7
JournalBulletin of the Astronomical Society of India
Issue number2
Publication statusPublished - 1 Jun 2012


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