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 |