Photometric Constraints upon Binaries in Bipolar Nebulae

Details Photometric Constraints upon Binaries in Bipolar Nebulae Photometric Constraints upon Binaries in Bipolar Nebulae

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aj....119..342p&link_type=abstract

The Astronomical Journal, Volume 119, Issue 1, pp. 342-351.

Astronomy and Astrophysics

Astronomy

4

General, Binaries: Planetary Nebulae: Close, Mass Function: Agb And Post-Agb, Stars, Stars: Luminosity Function

Scientific paper

We summarize current information concerning the photometry, distances, and extinctions for the central stars of bipolar nebulae (BPNs). These are used to place tight constraints upon the properties of binary companions and to derive upper limit mass and spectral functions for these stars. A comparison of these results with model binary systems suggests that many BPN central stars may have binary companions, although these are either unrecognized or undetected. However, the photometric limits also imply that such binaries are unlikely to undergo stable mass transfer during AGB Roche lobe overflow. Constraints upon the masses of the secondary stars also enable limits to be placed upon orbital velocities, whence it is apparent that the motion of very few of these binaries is likely to be detected at current levels of observational precision.

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