University of Hertfordshire

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V346 Nor: the post-outburst life of a peculiar young eruptive star

Research output: Contribution to journalArticle

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V346 Nor: the post-outburst life of a peculiar young eruptive star. / Kóspál, Á.; Szabó, Zs M.; Ábrahám, P.; Kraus, S.; Takami, M.; Lucas, P. W.; Peña, C. Contreras; Udalski, A.

In: The Astrophysical Journal, Vol. 889, No. 2, 148, 03.02.2020.

Research output: Contribution to journalArticle

Harvard

Kóspál, Á, Szabó, ZM, Ábrahám, P, Kraus, S, Takami, M, Lucas, PW, Peña, CC & Udalski, A 2020, 'V346 Nor: the post-outburst life of a peculiar young eruptive star', The Astrophysical Journal, vol. 889, no. 2, 148. https://doi.org/10.3847/1538-4357/ab6174

APA

Kóspál, Á., Szabó, Z. M., Ábrahám, P., Kraus, S., Takami, M., Lucas, P. W., ... Udalski, A. (2020). V346 Nor: the post-outburst life of a peculiar young eruptive star. The Astrophysical Journal, 889(2), [148]. https://doi.org/10.3847/1538-4357/ab6174

Vancouver

Author

Kóspál, Á. ; Szabó, Zs M. ; Ábrahám, P. ; Kraus, S. ; Takami, M. ; Lucas, P. W. ; Peña, C. Contreras ; Udalski, A. / V346 Nor: the post-outburst life of a peculiar young eruptive star. In: The Astrophysical Journal. 2020 ; Vol. 889, No. 2.

Bibtex

@article{6bdcf21e43154b60a60ad60000a6b0a9,
title = "V346 Nor: the post-outburst life of a peculiar young eruptive star",
abstract = "FU Orionis-type objects (FUors) are young low-mass stars undergoing powerful accretion outbursts. The increased accretion is often accompanied by collimated jets and energetic, large-scale molecular outflows. The extra heating during the outburst may also induce detectable geometrical, chemical, and mineralogical changes in the circumstellar material, affecting possible planet formation around these objects. V346 Nor is a southern FUor with peculiar spectral characteristics. Decades after the beginning of its outburst, it unexpectedly underwent a fading event around 2010 due to a decrease in the mass accretion rate onto the star by at least two orders of magnitude. Here we present optical and near-infrared photometry and spectroscopy obtained after the minimum. Our light curves show a gradual re-brightening of V346 Nor, with its Ks-band brightness only 1.5 mag below the outburst brightness level. Our VLT/XSHOOTER spectroscopic observations display several strong forbidden emission lines towards the source from various metals and molecular hydrogen, suggesting the launch of a new jet. Our N-band spectrum obtained with VLT/VISIR outlines a deeper silicate absorption feature than before, indicating that the geometry of the circumstellar medium has changed in the post-outburst period compared to peak brightness.",
keywords = "astro-ph.SR",
author = "{\'A}. K{\'o}sp{\'a}l and Szab{\'o}, {Zs M.} and P. {\'A}brah{\'a}m and S. Kraus and M. Takami and Lucas, {P. W.} and Pe{\~n}a, {C. Contreras} and A. Udalski",
year = "2020",
month = "2",
day = "3",
doi = "10.3847/1538-4357/ab6174",
language = "English",
volume = "889",
journal = "The Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

RIS

TY - JOUR

T1 - V346 Nor: the post-outburst life of a peculiar young eruptive star

AU - Kóspál, Á.

AU - Szabó, Zs M.

AU - Ábrahám, P.

AU - Kraus, S.

AU - Takami, M.

AU - Lucas, P. W.

AU - Peña, C. Contreras

AU - Udalski, A.

PY - 2020/2/3

Y1 - 2020/2/3

N2 - FU Orionis-type objects (FUors) are young low-mass stars undergoing powerful accretion outbursts. The increased accretion is often accompanied by collimated jets and energetic, large-scale molecular outflows. The extra heating during the outburst may also induce detectable geometrical, chemical, and mineralogical changes in the circumstellar material, affecting possible planet formation around these objects. V346 Nor is a southern FUor with peculiar spectral characteristics. Decades after the beginning of its outburst, it unexpectedly underwent a fading event around 2010 due to a decrease in the mass accretion rate onto the star by at least two orders of magnitude. Here we present optical and near-infrared photometry and spectroscopy obtained after the minimum. Our light curves show a gradual re-brightening of V346 Nor, with its Ks-band brightness only 1.5 mag below the outburst brightness level. Our VLT/XSHOOTER spectroscopic observations display several strong forbidden emission lines towards the source from various metals and molecular hydrogen, suggesting the launch of a new jet. Our N-band spectrum obtained with VLT/VISIR outlines a deeper silicate absorption feature than before, indicating that the geometry of the circumstellar medium has changed in the post-outburst period compared to peak brightness.

AB - FU Orionis-type objects (FUors) are young low-mass stars undergoing powerful accretion outbursts. The increased accretion is often accompanied by collimated jets and energetic, large-scale molecular outflows. The extra heating during the outburst may also induce detectable geometrical, chemical, and mineralogical changes in the circumstellar material, affecting possible planet formation around these objects. V346 Nor is a southern FUor with peculiar spectral characteristics. Decades after the beginning of its outburst, it unexpectedly underwent a fading event around 2010 due to a decrease in the mass accretion rate onto the star by at least two orders of magnitude. Here we present optical and near-infrared photometry and spectroscopy obtained after the minimum. Our light curves show a gradual re-brightening of V346 Nor, with its Ks-band brightness only 1.5 mag below the outburst brightness level. Our VLT/XSHOOTER spectroscopic observations display several strong forbidden emission lines towards the source from various metals and molecular hydrogen, suggesting the launch of a new jet. Our N-band spectrum obtained with VLT/VISIR outlines a deeper silicate absorption feature than before, indicating that the geometry of the circumstellar medium has changed in the post-outburst period compared to peak brightness.

KW - astro-ph.SR

U2 - 10.3847/1538-4357/ab6174

DO - 10.3847/1538-4357/ab6174

M3 - Article

VL - 889

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 148

ER -