The Candidate Protoplanetary Object IRAS 22223+4327 Is a Pulsating Variable Star

Details The Candidate Protoplanetary Object IRAS 22223+4327 Is a Pulsating Variable Star The Candidate Protoplanetary Object IRAS 22223+4327 Is a Pulsating Variable Star

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003astl...29..480a&link_type=abstract

Astronomy Letters, vol. 29, p. 480-485 (2003)

Astronomy and Astrophysics

Astronomy

7

Scientific paper

We present our photoelectric UBV observations of the candidate protoplanetary object IRAS 22223+4327 during four visibility seasons. The star exhibited periodic brightness variations with the maximum amplitudes Delta U = 0.23 mag, Delta B = 0.18 mag, and Delta V = 0.12 mag and a time scale of about 90 days, which is equal to the period derived by other authors from radial velocities. During these brightness variations, a correlation is observed between the (B-V) color index and brightness, which is characteristic of pulsations. We estimated the star's spectral type from our photometric data to be F8I. We detected a "deficit" of light in the U band. The star's mean brightness and its spectral type appear to have not changed in the past half a century.

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