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An UXor among FUors: extinction-related brightness variations of the young eruptive star V582 Aur

Published online by Cambridge University Press:  13 January 2020

P. Ábrahám ,
Á. Kóspál Open the ORCID record for Á. Kóspál [Opens in a new window] ,
M. Kun ,
O. Fehér Open the ORCID record for O. Fehér [Opens in a new window] ,
G. Zsidi  and
J. A. Acosta-Pulido
P. Ábrahám
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 15-17, H-1121, Budapest, Hungary
Á. Kóspál
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 15-17, H-1121, Budapest, Hungary Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
M. Kun
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 15-17, H-1121, Budapest, Hungary
O. Fehér
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 15-17, H-1121, Budapest, Hungary
G. Zsidi
Affiliation:
Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Konkoly-Thege Miklós út 15-17, H-1121, Budapest, Hungary Eötvös Loránd University, Dept. Astronomy, Pázmány Péter sétány 1/A, H-1117 Budapest
J. A. Acosta-Pulido
Affiliation:
Instituto de Astrofsica de Canarias, Avenida Va Láctea, E-38205 La Laguna, Tenerife, Spain Departamento de Astrofsica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain email: abraham@konkoly.hu
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Abstract

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The early evolution of Sun-like stars may be interspersed by energetic FU Orionis (FUor) type accretion outbursts. We analysed eight years of photometric and spectroscopic variability of V582 Aur, a bona fide FUor, in outburst. While the accretion rate derived from near-infrared measurements was constant, radical brightness changes occurred due to dust clumps crossing the line of sight. The brightness minima resemble the variability patterns of the UXor phenomenon. Orbiting density enhancements or short-lived clumps moving in and out of the line-of-sight may explain these observations. Our message is that during FUor outbursts the inner disk is a dynamically active place, affecting the initial conditions for planet formation.

Keywords

accretion disksstars: pre–main-sequencecircumstellar matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S345: Origins: From the Protosun to the First Steps of Life , August 2018 , pp. 390 - 392
Copyright
© International Astronomical Union 2020 

References

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