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Exploring the Archives: A Search for Novae in UVIT Snapshots of M31

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dc.contributor.author Basu, Judhajeet
dc.contributor.author Krishnendu, S
dc.contributor.author Barway, Sudhanshu
dc.contributor.author Chamoli, Shatakshi
dc.contributor.author Anupama, G. C
dc.date.accessioned 2024-09-10T09:14:26Z
dc.date.available 2024-09-10T09:14:26Z
dc.date.issued 2024-08-10
dc.identifier.citation The Astrophysical Journal, Vol. 971, No. 1, 8 en_US
dc.identifier.issn 1538-4357
dc.identifier.uri http://hdl.handle.net/2248/8529
dc.description Open Access en_US
dc.description Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
dc.description.abstract Extensive multiwavelength studies of novae have been carried out in our galaxy and in M31 for decades. However, UV studies of extragalactic novae are limited, especially those in quiescence. For the first time, we present a UV catalog of novae in M31 using the archival AstroSat Ultraviolet Imaging Telescope (UVIT) imaging data. We used two image subtraction techniques to retrieve objects located deep into the M31 central region. We have found 42 novae in total in the UVIT images, 15 of which have been detected in multiple filters in the far-ultraviolet (FUV) and near-ultraviolet. The novae detected at quiescence show signatures of accretion disk from their UV spectral energy distributions, whereas those in the outburst phase show signatures of a pseudo-photosphere. A few novae were also detected in multiple epochs. Some show a near-constant FUV magnitude at quiescence, while others caught near the outburst reveal pre-eruption dips in their light curves. We conclude with a discussion on the significance of UV surveys in illuminating theoretical predictions for novae systems, including detecting the elusive early UV flash. en_US
dc.language.iso en en_US
dc.publisher American Astronomical Society en_US
dc.relation.uri https://doi.org/10.3847/1538-4357/ad596b
dc.rights © 2024. The Author(s).
dc.subject Novae en_US
dc.subject Andromeda Galaxy en_US
dc.subject Ultraviolet astronomy en_US
dc.subject High energy astrophysics en_US
dc.subject Light curves en_US
dc.subject Spectral energy distribution en_US
dc.subject Extinction en_US
dc.subject Accretion en_US
dc.subject Stellar accretion disks en_US
dc.subject Astronomy image processing en_US
dc.subject Transient detection en_US
dc.subject Cataclysmic variable stars en_US
dc.title Exploring the Archives: A Search for Novae in UVIT Snapshots of M31 en_US
dc.type Article en_US


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