The geometry of the close environment of SV Psc as probed by VLTI/MIDI

Details The geometry of the close environment of SV Psc as probed by VLTI/MIDI The geometry of the close environment of SV Psc as probed by VLTI/MIDI

2012-04-23

arxiv.org/abs/1204.5015v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

10 pages, 12 figures

Scientific paper

Context. SV Psc is an asymptotic giant branch (AGB) star surrounded by an oxygen-rich dust envelope. The mm-CO line profile of the object's outflow shows a clear double-component structure. Because of the high angular resolution, mid-IR interferometry may give strong constraints on the origin of this composite profile. Aims. The aim of this work is to investigate the morphology of the environment around SV Psc using high-angular resolution interferometry observations in the mid-IR with the Very Large Telescope MID-infrared Interferometric instrument (VLTI/MIDI). Methods. Interferometric data in the N-band taken at different baseline lengths (ranging from 32-64 m) and position angles (73- 142{\deg}) allow a study of the morphology of the circumstellar environment close to the star. The data are interpreted on the basis of 2-dimensional, chromatic geometrical models using the fitting software tool GEM-FIND developed for this purpose. Results. The results favor two scenarios: (i) the presence of a highly inclined, optically thin, dusty disk surrounding the central star; (ii) the presence of an unresolved binary companion at a separation of 13.7 AU and a position angle of 121.8{\deg} NE. The derived orbital period of the binary is 38.1 yr. This detection is in good agreement with hydrodynamic simulations showing that a close companion could be responsible for the entrainment of the gas and dust into a circumbinary structure.

Affiliated with

Also associated with

No associations

Rating

The geometry of the close environment of SV Psc as probed by VLTI/MIDI does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The geometry of the close environment of SV Psc as probed by VLTI/MIDI, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The geometry of the close environment of SV Psc as probed by VLTI/MIDI will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-443748