SIMBAD references

2019MNRAS.486.4334H - Mon. Not. R. Astron. Soc., 486, 4334-4347 (2019/July-1)

AT 2017fvz: a nova in the dwarf irregular galaxy NGC 6822.

HEALY M.W., DARNLEY M.J., COPPERWHEAT C.M., FILIPPENKO A.V., HENZE M., HESTENES J.C., JAMES P.A., PAGE K.L., WILLIAMS S.C. and ZHENG W.

Abstract (from CDS):

A transient in the Local Group dwarf irregular galaxy NGC 6822 (Barnard's Galaxy) was discovered on 2017 August 2 and is only the second classical nova discovered in that galaxy. We conducted optical, near-ultraviolet, and X-ray follow-up observations of the eruption, the results of which we present here. This 'very fast' nova had a peak V-band magnitude in the range -7.41 > MV > -8.33 mag, with decline times of t2,V = 8.1 ± 0.2 d and t3,V = 15.2 ± 0.3 d. The early- and late-time spectra are consistent with an Fe II spectral class. The H α emission line initially has a full width at half-maximum intensity of ∼2400 km s–1 - a moderately fast ejecta velocity for the class. The H α line then narrows monotonically to ∼1800 km s–1 by 70 d post-eruption. The lack of a pre-eruption coincident source in archival Hubble Space Telescope imaging implies that the donor is a main-sequence, or possibly subgiant, star. The relatively low-peak luminosity and rapid decline hint that AT 2017fvz may be a 'faint and fast' nova.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: individual: (AT 2017fvz) - novae, cataclysmic variables

Simbad objects: 17

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2019.10.23-18:55:17

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