HST and VLT observations of the Symbiotic Star Hen 2-147

Simple item page
dc.creatorSantander-Garcia, M.
dc.creatorCorradi, R. L. M.
dc.creatorWhitelock, P. A.
dc.creatorMunari, U.
dc.creatorMampaso, A.
dc.creatorMarang, F.
dc.creatorBoffi, F.
dc.creatorLivio, M.
dc.date2007-01-14
dc.date.accessioned2026-07-07T07:40:46Z
dc.date.available2026-07-07T07:40:46Z
dc.descriptionWe investigate the dynamics of the nebula around the symbiotic star Hen 2-147, determine its expansion parallax, and compare it with the distance obtained via the Period-Luminosity relation for its Mira variable. The geometry of the nebula is found to be that of a knotty annulus of ionized gas inclined to the plane of sky and expanding with a velocity of ~90 km/s. A straightforward application of the expansion parallax method provides a distance of 1.5+-0.4 kpc, which is a factor of two lower than the distance of 3.0+-0.4 kpc obtained from the Period-Luminosity relationship for the Mira (which has a pulsation period of 373 days). The discrepancy is removed if, instead of expanding matter, we are observing the expansion of a shock front in the plane of the sky. This shock interpretation is further supported by the broadening of the nebular emission lines.
dc.descriptionAccepted for publication in A&A; 16 pages, 13 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0701404
dc.identifierhttp://arxiv.org/abs/astro-ph/0701404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/121875
dc.subjectAstrophysics
dc.titleHST and VLT observations of the Symbiotic Star Hen 2-147
dc.typetext

Files

Collections

arXiv