Searching For Low-mass Companions Of Cepheids

Details Searching For Low-mass Companions Of Cepheids Searching For Low-mass Companions Of Cepheids

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21823002r&link_type=abstract

American Astronomical Society, AAS Meeting #218, #230.02; Bulletin of the American Astronomical Society, Vol. 43, 2011

Physics

Optics

Scientific paper

The role played by binary and multiple stars in star formation is receiving a great deal of attention, both theoretically and observationally. Two questions under discussion are how wide physical companions can be and how frequently massive stars have low mass companions. An important new observational tool is the development of high resolution imaging, both from space and from the ground (Adaptive Optics and interferometry). We are conducting a snapshot survey of the nearest Cepheids using the Hubble Space Telescope Wide Field Camera 3 (WFC3). The aim is to discover possible resolved low mass companions. Results from this survey will be discussed, including images of Eta Aql. X-ray luminosity can confirm or refute that putative low mass companions are young enough to be physical companions. This project tests the reality of both wide and low mass companions of these intermediate-mass stars.

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