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Detection of an Extremely Active State of AM Canum Venaticorum

Published online by Cambridge University Press:  12 April 2016

K.R. Narayanan Kutty ,
T.M.K. Marar ,
V.N. Padmini ,
S. Seetha ,
K. Kasturirangan ,
U.R. Rao ,
J.C. Bhattacharyya ,
S. Mohin  and
K. Jayakumar
K.R. Narayanan Kutty
Affiliation:
ISRO Satellite Centre, Airport Road, BANGALORE 560 017, INDIA.
T.M.K. Marar
Affiliation:
ISRO Satellite Centre, Airport Road, BANGALORE 560 017, INDIA.
V.N. Padmini
Affiliation:
ISRO Satellite Centre, Airport Road, BANGALORE 560 017, INDIA.
S. Seetha
Affiliation:
ISRO Satellite Centre, Airport Road, BANGALORE 560 017, INDIA.
K. Kasturirangan
Affiliation:
ISRO Satellite Centre, Airport Road, BANGALORE 560 017, INDIA.
U.R. Rao
Affiliation:
ISRO Satellite Centre, Airport Road, BANGALORE 560 017, INDIA.
J.C. Bhattacharyya
Affiliation:
Indian Institute of AstrophysicsBANGALORE 560 034, INDIA.
S. Mohin
Affiliation:
Indian Institute of AstrophysicsBANGALORE 560 034, INDIA.
K. Jayakumar
Affiliation:
Indian Institute of AstrophysicsBANGALORE 560 034, INDIA.

Abstract:

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We report fast photometric observations on AM CANUM VENATICORUM (AM CVn) the ultra short period, hydrogen deficient variable. We have detected on 24th February, 1985 an intense flare of (Δm)peak≈0.34 in white light lasting over 200s. Following this flare we observe an enhanced double humped structure lasting for 1051s which is the dominant periodicity exhibited by AM CVn. We have also detected the 525s and 1051s periods. In addition, we report flickerings, lasting typically 1-2 minutes, that are characteristic of cataclysmic variables.

Type
VII Related Objects
Information
International Astronomical Union Colloquium , Volume 87: Hydrogen Deficient Stars and Related Objects , 1985 , pp. 397 - 403
Copyright
Copyright © Reidel 1986

References

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