Poster abstract details
The hunt for the PN binary fraction
Abstract
The hunt for the PN binary fraction
During the past 20 years, the idea that non-spherical PN might need a binary or planetary interaction to be shaped was discussed by various authors. It is now generally agreed that the different shapes and structures of PN cannot be fully explained by single stars evolution. Observationally, more and more PN have been discovered in the middle of PN, opening the binary central star of PN hunt that is today of a major interest in PN observing and understanding (see DeMarco 2009, Miszalski et al. 2009). Thanks to these efforts, approximately 45 binary central star of PN have been detected. All of these are close binaries detected via flux and radial velocity variability. However, a more comprehensive idea of the binary fraction is needed to support of disprove the binary hypothesis. In this talk, we will present the results of the last observations led by our team concentrating on IR excess observations aimed at detecting wider binaries.
During the past 20 years, the idea that non-spherical PN might need a binary or planetary interaction to be shaped was discussed by various authors. It is now generally agreed that the different shapes and structures of PN cannot be fully explained by single stars evolution. Observationally, more and more PN have been discovered in the middle of PN, opening the binary central star of PN hunt that is today of a major interest in PN observing and understanding (see DeMarco 2009, Miszalski et al. 2009). Thanks to these efforts, approximately 45 binary central star of PN have been detected. All of these are close binaries detected via flux and radial velocity variability. However, a more comprehensive idea of the binary fraction is needed to support of disprove the binary hypothesis. In this talk, we will present the results of the last observations led by our team concentrating on IR excess observations aimed at detecting wider binaries.