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e-EVN Observations of AM Herculius

M. P. Gawroński, K. Katarzynński, G. Rycyk

Transactions of IAA RAS, issue 40, 84–88 (2017)

Keywords: VLBI, Astrometry, magnetic cataclysmic variables, AM Herculis

Abstract

AM Herculis is the prototype of the class of magnetic cataclysmic variables called Polars. We conducted an astrometric survey of AM Her with the e-EVN at 5 GHz in years 2012–2013, and made a new distance estimation (88.4±1.5 pc). We were able to detect the AM Her quiescent radio emission in the range 0.18–0.37 mJy. We also present evidence that the AM Her quiescent radio flux is modulated with orbital phase of the system with two minima detected. We suggest that an emission mechanism similar to proposed for RS CVn binary systems could explain observed properties of the AM Her phased radio light curve. In this picture both components are magnetically active and the quiescent radio emission distinguish this kind of binary system from other Polars.

Citation

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BibTeX

RIS

M. P. Gawroński, K. Katarzynński, G. Rycyk. e-EVN Observations of AM Herculius // Transactions of IAA RAS. — 2017. — Issue 40. — P. 84–88.

@article{gawroński2017,
  abstract = {AM Herculis is the prototype of the class of magnetic cataclysmic variables called Polars. We conducted an astrometric survey of AM Her with the e-EVN at 5 GHz in years 2012–2013, and made a new distance estimation (88.4±1.5 pc). We were able to detect the AM Her quiescent radio emission in the range 0.18–0.37 mJy. We also present evidence that the AM Her quiescent radio flux is modulated with orbital phase of the system with two minima detected. We suggest that an emission mechanism similar to proposed for RS CVn binary systems could explain observed properties of the AM Her phased radio light curve. In this picture both components are magnetically active and the quiescent radio emission distinguish this kind of binary system from other Polars.},
  author = {M.~P. Gawroński and K. Katarzynński and G. Rycyk},
  issue = {40},
  journal = {Transactions of IAA RAS},
  keyword = {VLBI, Astrometry, magnetic cataclysmic variables, AM Herculis},
  pages = {84--88},
  title = {e-EVN Observations of AM Herculius},
  url = {http://iaaras.ru/en/library/paper/1684/},
  year = {2017}
}

TY  - JOUR
TI  - e-EVN Observations of AM Herculius
AU  - Gawroński, M. P.
AU  - Katarzynński, K.
AU  - Rycyk, G.
PY  - 2017
T2  - Transactions of IAA RAS
IS  - 40
SP  - 84
AB  - AM Herculis is the prototype of the class of magnetic cataclysmic
variables called Polars. We conducted an astrometric survey of AM Her
with the e-EVN at 5 GHz in years 2012–2013, and made a new distance
estimation (88.4±1.5 pc). We were able to detect the AM Her quiescent
radio emission in the range 0.18–0.37 mJy. We also present evidence
that the AM Her quiescent radio flux is modulated with orbital phase
of the system with two minima detected. We suggest that an emission
mechanism similar to proposed for RS CVn binary systems could explain
observed properties of the AM Her phased radio light curve. In this
picture both components are magnetically active and the quiescent
radio emission distinguish this kind of binary system from other
Polars.
UR  - http://iaaras.ru/en/library/paper/1684/
ER  -