Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.8408j&link_type=abstract
American Astronomical Society, 183rd AAS Meeting, #84.08; Bulletin of the American Astronomical Society, Vol. 25, p.1423
Astronomy and Astrophysics
Astronomy
3
Scientific paper
The unusual carbon star, V Hydrae, is a semiregular variable with a period of 530 days superimposed on a longer, large amplitude period of 6500 days. It has been observed to have bipolar CO outflow (Kahane et al., 1988), and is believed to be an early precursor of a bipolar planetary nebula (Tsuji et al., 1988). In an earlier program (Johnson and Jones, 1991), we observed V Hya with a broad-band polarimeter. We found that it was intrinsically polarized with P on the order of 0.7% at V. We re-observed V Hya at the University of Wisconsin's Pine Bluff Observatory using a spectropolarimeter, and found that the polarization has increased dramatically to 10% at V, with a near 90 degree rotation in position angle from the earlier observation. Near the epoch when we observed V Hya for the second time, it was reported by T. L. Evans that V Hya was experiencing a decline in visible light. The infrared colors have also become redder, suggesting a possible dust ejection episode. V Hya is expected to reach a deep minimum sometime in 1994. We combine our polarimetric observations with our infrared and optical photometry and optical spectroscopy to propose a possible explanation for the polarimetric variations.
No associations
LandOfFree
A Dramatic Change in the Polarization of V Hya 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 A Dramatic Change in the Polarization of V Hya, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Dramatic Change in the Polarization of V Hya will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-780605