J/A+A/639/L10 VRI photometry of V392 Per (Munari+, 2020)
The sustained post-outburst brightness of Nova Per 2018, the evolved companion,
and the long orbital period.
Munari U., Moretti S., Maitan A.
<Astron. Astrophys. 639, L10 (2020)>
=2020A&A...639L..10M 2020A&A...639L..10M (SIMBAD/NED BibCode)
ADC_Keywords: Novae ; Binaries, cataclysmic ; Photometry, VRI
Keywords: novae, cataclysmic variables
Abstract:
Nova Per 2018 (= V392 Per) halted the decline from maximum when it was
2mag brighter than quiescence and since 2019 has been stable at such a
plateau. The ejecta have already fully diluted into the interstellar
space. We obtained BVRIgrizY photometry and optical spectroscopy of
V392 Per during the plateau phase and compared it with equivalent data
gathered prior to the nova outburst. We find the companion star (CS)
to be a G9 IV/III and the orbital period to be 3.4118 days, making
V392 Per the longest known period for a classical nova. The location
of V392 Per on the theoretical isochrones is intermediate between that
of classical novae and novae erupting within symbiotic binaries, in a
sense bridging the gap. The reddening is derived to be E(B-V)=0.72 and
the fitting to isochrones returns a 3.6Gyr age for the system and
1.35M☉, 5.3R☉, and 15L☉ for the companion. The huge
Ne overabundance in the ejecta and the very fast decline from nova
maximum both point to a massive white dwarf (M(WD)≥1.1/1.2M☉).
The system is viewed close to pole-on conditions and the current
plateau phase is caused by irradiation of the CS by the WD still
burning at the surface.
Description:
VRI epoch photometry of V392 Per. The quoted error is the quadratic
sum of the Poissonian error on the variable and the error in the
transformation from the instantaneous local photometric system to the
Landolt equatorial standard system.
Objects:
-----------------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------------
04 43 21.37 +47 21 25.9 V392 Per = V* V392 Per
-----------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 55 115 VRI epoch photometry of V392 Per
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d HJD Heliocentric Julian date
16- 21 F6.3 mag Vmag V magnitude
23- 27 F5.3 mag e_Vmag Error on V mag
30- 35 F6.3 mag Rmag R magnitude
37- 41 F5.3 mag e_Rmag Error on R mag
44- 49 F6.3 mag Imag ? I magnitude
51- 55 F5.3 mag e_Imag ? Error on I mag
--------------------------------------------------------------------------------
Acknowledgements:
Ulisse Munari, ulisse.munari(at)inaf.it
(End) Ulisse Munari [INAF, Padova-Asiago], Patricia Vannier [CDS] 30-Jun-2020