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Water maser flare and potential accretion burst in NGC 2071-IR

Published online by Cambridge University Press:  07 February 2024

Andrews Dzodzomenyo Open the ORCID record for Andrews Dzodzomenyo [Opens in a new window] ,
James O. Chibueze Open the ORCID record for James O. Chibueze [Opens in a new window]  and
Stefanus van den Heever Open the ORCID record for Stefanus van den Heever [Opens in a new window]
Andrews Dzodzomenyo*
Affiliation:
Centre for Space Research, North-West University, Potchefstroom, South Africa
James O. Chibueze
Affiliation:
Centre for Space Research, North-West University, Potchefstroom, South Africa Department of Physics and Astronomy, University of Nigeria, Nsukka, Nigeria Department of Mathematical Sciences, University of South Africa, Cnr Christian de Wet Rd and Pioneer Avenue, Florida Park, 1709, Roodepoort, South Africa
Stefanus van den Heever
Affiliation:
South African Radio Astronomy Observatory, South Africa
*
email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

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We monitored 22 GHz water masers in NGC 2071-IR using the Hartebeesthoek 26-m telescope and identified a significant flare (up to 4722 Jy) originating from the 14.4 km s-1 feature associated with the protostellar core NGC 2071-IRS1. To determine if the maser flare resulted from an accretion burst, we analyzed related signatures such as simultaneous flaring of other maser species and an increase in infrared luminosity. Near-infrared (Ks-band) observations conducted on 28 December 2019 during the flare, using the Kanata/HONIR telescope, exhibited a 0.2 magnitude increase in comparison to the 2MASS magnitude obtained from observations conducted on 10 October 1999. However, our findings indicate that the flare was attributed to mechanisms other than an accretion burst.

Keywords

Masersstars: formationISM: jets and outflowsISM: individual objects (NGC 2071)
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 213 - 215
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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