000002749 001__ 2749
000002749 005__ 20160701171710.0
000002749 037__ $$aASTROimport-906
000002749 100__ $$aVamvatira-Nakou, C.
000002749 245__ $$aThe Nebula around the Luminous Blue Variable WRAY 15-751 as seen by Herschel
000002749 260__ $$c2013
000002749 520__ $$aTo understand the evolution of massive stars it is crucial to study the nebulae associated to Luminous Blue Variables which can reveal the star mass-loss history. We obtained far-infrared Herschel PACS imaging and spectroscopic observations of the nebula associated with the Luminous Blue Variable star WRAY 15-751. These images revealed a second nebula, bigger and cooler, lying in an empty cavity that probably delineates the remnant of the O-star bubble formed when the star was on the Main Sequence. The dust mass and temperature were derived from the modeling of the far-infrared SED. The analysis of the emission line spectrum revealed that the main nebula consists of a region of photoionised gas surrounded by a thin photodissociation region. Both regions are mixed with dust. The calculated C, N, O abundances, together with the estimated mass-loss rate, show that the nebula was ejected from the star during a Red Supergiant phase. This is compatible with the latest evolutionary tracks for a ~40 Mo star with little rotation. 
000002749 700__ $$a Hutsemekers, D.
000002749 700__ $$a Royer, P.
000002749 700__ $$a Naze, Y.
000002749 700__ $$a Magain, P.
000002749 700__ $$a Exter, K.
000002749 700__ $$a Waelkens, C.
000002749 700__ $$a Groenewegen, M.
000002749 773__ $$c188$$pMassive Stars: From alpha to Omega$$y2013
000002749 85642 $$ahttp://esoads.eso.org/abs/2013msao.confE.188V
000002749 905__ $$apublished in
000002749 980__ $$aNONREF