J/MNRAS/435/771 Nova Mon 2012 BV(RI)c light curves (Munari+, 2013)
Photometric evolution, orbital modulation and progenitor of Nova Mon 2012.
Munari U., Dallaporta S., Castellani F., Valisa P., Frigo A., Chomiuk L.,
Ribeiro V.A.R.M.
<Mon. Not. R. Astron. Soc., 435, 771-781 (2013)>
=2013MNRAS.435..771M 2013MNRAS.435..771M
ADC_Keywords: Novae ; Binaries, cataclysmic ; Photometry, UBVRI
Keywords: novae, cataclysmic variables
Abstract:
We present and discuss accurate and densely mapped BVRCIC light
curves of the neon Nova Mon 2012, supplemented by the evolution in
Stromgren b and y bands and in the integrated flux of relevant
emission lines. Our monitoring started with the optical discovery of
the nova (50days past the first detection in gamma-rays by Fermi-LAT)
and extend to day +270, well past the end of the super-soft phase in
X-rays. The nova was discovered during the nebular decline, well past
t3 and the transition to optically thin ejecta. It displayed very
smoothly evolving light curves. A bifurcation between y and V light
curves took place at the start of the super-soft X-ray source (SSS)
phase, and a knee developed towards the end of the SSS phase. The
apparent magnitude of the nova at the unobserved optical maximum is
constrained to +3≤V≤4.5. The appearance, grow in amplitude and then
demise of a 0.29585 (±0.00002) days orbital modulation of the
optical brightness was followed along the nova evolution. The observed
modulation, identical in phase and period with the analogue seen in
the X-ray and satellite ultraviolet, has a near-sinusoidal shape and a
weak secondary minimum at phase 0.5. We favour an interpretation in
terms of super-imposed ellipsoidal distortion of the Roche lobe
filling companion and irradiation of its side facing the WD. Similar
light curves are typical of symbiotic stars where a Roche lobe filling
giant is irradiated by a very hot WD. Given the high orbital
inclination, mutual occultation between the donor star and the
accretion disc could contribute to the observed modulation. The
optical+infrared spectral energy distribution of Nova Mon 2012 during
the quiescence preceding outburst is nicely fitted by an early K-type
main-sequence star (∼K3V) at 1.5kpc distance, reddened by E(B-V)=0.38,
with a WD companion and an accretion disc contributing to the observed
blue excess and moderate Hα emission. A typical early K-type
main-sequence star with a mass of ∼0.75M☉ and a radius of ∼0.8
R☉ would fill its Roche lobe for a P=0.29585d orbital period and a
more massive WD companion (as implied by the large Ne overabundance of
the ejecta).
Description:
BVRCIC photometry of Nova Mon 2012 was obtained with three of the
telescopes operated by ANS Collaboration (N. 30, 36 and 61).
Spectroscopic observations of Nova Mon 2012 have been obtained with
three different telescopes. High-resolution Echelle spectra were
provided by Asiago 1.82-m telescope operated by the National Institute
of Astrophysics (INAF), and by ANS Collaboration 0.6-m telescope
operated by Schiaparelli Observatory in Varese. Low-resolution spectra
were obtained with the B&C spectrograph mounted on the Asiago 1.22-m
telescope of the University of Padova.
Objects:
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RA (2000) DE Designation(s)
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06 39 38.74 +05 53 52.0 Nova Mon 2012 = V* V959 Mon
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 40 104 Our merged photometry of Nova Mon 2012
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See also:
J/AZh/71/618 : UBVJHKLM Photometry of Nova Cygni 1992 (Kolotilov+, 1994)
J/A+A/448/1107 : RI light curves of V1493 Aql (Dobrotka+, 2006)
J/A+A/452/567 : Spectra of Nova Scuti 2005 N.2 (V477 Sct) (Munari+, 2006)
J/A+A/459/875 : Early spectral evolution of Nova Sgr 2004 (Ederoclite+, 2006)
J/A+A/486/855 : R light curve of DO Dra (Andronov+, 2008)
J/A+A/492/145 : UBV(RI)c light curves of Nova Cygni 2006 (Munari+, 2008)
J/MNRAS/387/344 : BVRcIC photometry of V2615 Oph (Munari+, 2008)
J/other/CoSka/39.43 : Nova Tri UBV(RI)c light curves (Chochol+, 2009)
J/A+A/497/437 : V light curves of DI UMa (Rutkowski+, 2009)
J/AJ/140/925 : Pre-eruption light curves for Nova U Sco (Schaefer+, 2010)
J/other/PZ/30.4 : BVRI photometry of nova V445 Pup (Goranskij+, 2010)
J/ApJ/742/113 : Photometry during the 2010 eruption of U Sco (Schaefer+ 2011)
J/AJ/141/121 : V446 Her V light curves (Honeycutt+, 2011)
J/AJ/141/122 : DK Lac V light curves (Honeycutt+, 2011)
J/A+A/539/A94 : Mean spectrum of CP Pup in 1996 (Bianchini+, 2012)
J/A+A/543/A86 : Nova V1280 Sco BVRcIcy light curves (Naito+, 2012)
J/A+A/544/A26 : CI Aql spectra during 2000 outburst (Iijima, 2012)
J/PAZh/28/764 : UBVR photometry of Nova Mon 2002 (V838 Mon) (Goranskii+ 2002)
J/other/CoSka/42.39 : UBVRI light curves of Dwarf nova Peg 2010 (Chochol+ 2012)
J/A+A/559/A121 : U Sco outburst & pre-outburst optical spectrum (Anupama 2013)
J/A+A/566/A101 : V893 Sco long-term photometry (Bruch, 2014)
J/AJ/147/105 : Light curve of HR Lyr over 1991-2012 (Honeycutt+, 2014)
J/ApJ/755/158 : Near-IR interferometry of nova Vul 2007 (Rajabi+, 2012)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 F9.4 d HJD Heliocentric Julian Date (HJD-2450000)
11- 16 F6.3 mag Bmag ? Johnson B magnitude
18- 23 F6.3 mag Vmag Johnson V magnitude
25- 30 F6.3 mag Rcmag ? Cousins R magnitude
32- 37 F6.3 mag Icmag ? Cousins I magnitude
39- 40 I2 --- Tel Telescope number
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 13-Jan-2015