V618 Sgr: galactic eclipsing symbiotic nova detected in repeated outbursts-Reference-Cited by-同舟云学术

V618 Sgr: galactic eclipsing symbiotic nova detected in repeated outbursts

Published:2023-05-12 Issue:1 Volume:523 Page:163-168
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Merc J¹^ORCID,Gális R²,Velez P³,Charbonnel S⁴,Garde O⁴,Le Dû P⁴,Mulato L⁴,Petit T⁴,Bohlsen T³,Curry S³,Love T³,Barker H³

Affiliation:

1. Astronomical Institute, Faculty of Mathematics and Physics, Charles University , V Holešovičkách 2, Prague 180 00, Czechia

2. Institute of Physics, Faculty of Science, P. J. Šafárik University , Park Angelinum 9, 040 01 Košice, Slovakia

3. Astronomical Ring for Amateur Spectroscopy Group (ARAS) , 76100 Rouen, France

4. Southern Spectroscopic Project Observatory Team (2SPOT) , 45 Chemin du Lac, F-38690 Châbons, France

Abstract

ABSTRACT V618 Sgr was previously classified as an R CrB-type variable and later as a possible symbiotic star. Our study aims to analyse the nature of this target, which is currently undergoing significant brightening in properties similar to those of known symbiotic novae. We analyse literature information, photometric observations, and 35 new optical spectra. Our findings strongly suggest that V618 Sgr is an eclipsing symbiotic nova currently in outburst. Additionally, since the star has demonstrated at least two similar brightenings in the past, we propose that V618 Sgr could be the first known galactic symbiotic nova observed in repeated outbursts of this type and may host a relatively massive white dwarf.

Funder

Charles University

Slovak Research and Development Agency

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad1434/50305300/stad1434.pdf

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