J.M. Marlborough
University of Western Ontario
6 Papers
10 Citations
J.M. Marlborough is an academic researcher from University of Western Ontario. The author has contributed to research in topics: Stars & Emission spectrum. The author has an hindex of 2, co-authored 6 publications.
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Papers
•Journal Article
The infrared spectrum of the Be star gamma Cassiopeiae
Sacha Hony,L.B.F.M. Waters,P. Zaal,A. de Koter,J.M. Marlborough,C.E. Miller,N. R. Trams,Patrick W. Morris,Th. de Graauw +8 more
TL;DR: In this paper, the 2.4 45 m ISO-SWS spectrum of the Be star Cas (B0.5 IVe) was analyzed, and it was shown that the spectrum is characterised by a thermal continuum which can be well fit by a power-law S / 0:99 over the entire SWS wavelength range.
A hidden class of Be stars
P. A. Zaal,L. B. F. M. Waters,J.M. Marlborough,T. R. Geballe +3 more
- 01 Jan 1994
TL;DR: In this paper, simple HI recombination line calculations in the infrared and in the optical were performed to demonstrate that there could be a class of B stars with low-density discs, a factor of 100 lower in density compared to normal Be stars, which may have escaped detection so far.
2
ISO observations of Be stars
L.B.F.M. Waters,N. R. Trams,S. Hony,A. de Koter,Patrick W. Morris,P. Zaal,J.M. Marlborough,C.E. Millar,B. Vandenbussche +8 more
- 01 Jan 2000
Abstract: . We discuss the infrared spectral energy distribution of Be stars, focusing on new results obtained with the Infrared Space Observa tory. The 60-160 fira flux of some Be stars is higher than expected, which may be due to cold dust or an outer disk component with enhanced den sities. The infrared spectrum of Be stars is dominated by numerous HI recombination lines, whose line strengths show a complex behaviour. The electron temperature in the disk of 7 Cas was found to be about 9500 K, and evidence for an elevated temperature near the upper part of the disk is presented. Be stars may be recognized from their infrared spectrum on the basis of HI line flux ratios.
•Journal Article
The hi infrared line spectrum for be stars with low-density discs
TL;DR: In this paper, the authors present theoretical H alpha and HI IR recombination line calculations for low-density discs around B stars, and they find that IR emission lines may be detectable for densities up to about 10(-14) gcm(-3) which is a factor 10(2) - 10(3) lower than typically found in Be stars.