Chandra X-ray Detection Of The Disk-enshrouded, Jet-driving Field Star BP Psc

Details Chandra X-ray Detection Of The Disk-enshrouded, Jet-driving Field Star BP Psc Chandra X-ray Detection Of The Disk-enshrouded, Jet-driving Field Star BP Psc

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21533507k&link_type=abstract

American Astronomical Society, AAS Meeting #215, #335.07; Bulletin of the American Astronomical Society, Vol. 42, p.435

Astronomy and Astrophysics

Astrophysics

Scientific paper

BP Psc is an enigmatic late-type, emission-line field star with large infrared excess. The star is orbited by a nearly edge-on circumstellar dust disk and displays an extensive system of jets and Herbig-Haro objects similar to those associated with cloud-embedded pre-main sequence (pre-MS) stars. However, BP Psc lies in a region of sky devoid of star-forming clouds and young stars, and its photospheric absorption features appear more consistent with post-MS than pre-MS status. Furthermore, the chemistry of its molecular disk is unlike those of pre-MS stars. Hence, while BP Psc may be an isolated and relatively old classical T Tauri star that has somehow retained a spectacular disk/jet system, the star is more likely a first-ascent giant that has recently undergone a catastrophic interaction with a close companion. To investigate the nature of BP Psc, we observed its field for 75.5 ks with the Advanced CCD Imaging Spectrometer aboard the Chandra X-ray Observatory. Here, we report the detection of a weak X-ray source at the position of the star. We discuss the implications of this X-ray detection for the foregoing, alternative (pre-MS vs. post-MS) models attempting to account for the remarkable characteristics of BP Psc.
This research is supported by Chandra X-ray Center Guest Observer grant GO8-9004X to RIT.

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