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[Observatoire de la Côte d’Azur] Astrophysics
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Astrophysics

My astrophysics work focuses mainly mainly on massive stars.

These stars are among the strangest celestial bodies: nobody knows how they form (although recent works start to raise the blanket), they evolve fast (few million years) and end in a supernova blast. Here, you will find some information on my research work on massive stars.

 
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mardi 7 octobre 2014
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V854 Cen is surrounded by a dusty shell !
This paper is part of a series of the two last papers written by my colleague and friend Olivier Chesneau which unfortunately passed away in May 2014. V854 Cen is an emblematic star of (...) lire la suite de l'article
mardi 14 octobre 2014
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V838 Mon is shrinking !
This paper is part of a series of the two last papers written by my colleague and friend Olivier Chesneau which unfortunately passed away in May 2014. V838 Mon is a famous cool star (...) lire la suite de l'article
mercredi 26 mars 2014
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The hyper giant "Peanut"
HR5171 A is a yellow hypergiant star, which was not well studied in the past. In that work, we measured the angular diameter of the star by means of optical long-baseline (...) lire la suite de l'article
vendredi 12 décembre 2014
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HD 62623 imaging
HD 62623 is a hot, massive star of spectral type A (i.e. with a temperature around 10 000 Kelvin). It is one of the few stars of its kind which hosts dust in its environment. Such a hot (...) lire la suite de l'article
jeudi 23 décembre 2010
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WR 118
Among Wolf-Rayet stars, few of them have very peculiar properties : though Wolf-Rayet stars are among the hottest and brightest stars, most of the the sub-types WC8 and WC9 stars (...) lire la suite de l'article
mercredi 7 mars 2012
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HD87643
HD 87643 is a member of a very enigmatic class of stellar objects, the so-called class of "stars with the B[e] phenomenon". This B[e] phenomenon is a conjuction of a (...) lire la suite de l'article
mercredi 7 mars 2012
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Gamma² Velorum
Gamma² Velorum is one of the brightest stars in the southern skies. With a Hipparcos-measured distance of 258 pc, it is also the closest Wolf-Rayet star to our solar system, making it a (...) lire la suite de l'article