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A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ejecta at late stages could result from interactions with the…

Detection of X-rays from classical novae, both in outburst and post-outburst, provides unique and crucial information about the explosion mechanism. Soft X-rays reveal the hot white dwarf photosphere, whenever hydrogen (H) nuclear burning…

High Energy Astrophysical Phenomena · Physics 2015-05-14 M. Hernanz , G. Sala

A classical nova results from runaway thermonuclear explosions on the surface of a white dwarf that accretes matter from a low-mass main-sequence stellar companion. In 2012 and 2013, three novae were detected in gamma rays and stood in…

High Energy Astrophysical Phenomena · Physics 2014-08-05 LAT Collaboration

Nova explosions occur on the white dwarf component of a Cataclysmic Variable binary stellar system that is accreting matter lost by its companion. When sufficient material has been accreted by the white dwarf, a thermonuclear runaway occurs…

Solar and Stellar Astrophysics · Physics 2016-05-16 S. Starrfield , C. Iliadis , W. R. Hix

We survey our understanding of classical novae: non-terminal, thermonuclear eruptions on the surfaces of white dwarfs in binary systems. The recent and unexpected discovery of GeV gamma-rays from Galactic novae has highlighted the…

High Energy Astrophysical Phenomena · Physics 2021-12-01 Laura Chomiuk , Brian D. Metzger , Ken J. Shen

Context: Classical nova progenitors are cataclysmic variables and very old novae are observed to match high mass transfer rate and (relatively) long orbital period systems. However, the aftermath of a classical nova has never been studied…

Solar and Stellar Astrophysics · Physics 2021-05-12 Elena Mason , Steven N. Shore , Jeremy Drake , Steve B. Howell , Paul Kuin , Enza Magaudda

The majority of thermonuclear explosions in the Universe seem to proceed in a rather standardised way, as explosions of carbon-oxygen (CO) white dwarfs in binary systems, leading to 'normal' Type Ia supernovae (SNe Ia). However, over the…

High Energy Astrophysical Phenomena · Physics 2018-04-25 Stefan Taubenberger

Classical novae are thermonuclear explosions that take place in the envelopes of accreting white dwarfs in binary systems. The material piles up under degenerate conditions, driving a thermonuclear runaway. The energy released by the suite…

Solar and Stellar Astrophysics · Physics 2016-06-29 Jordi Casanova , Jordi Jose , Enrique Garcia-Berro , Steven N. Shore

Context. Classical novae are thermonuclear explosions hosted by accreting white dwarfs in stellar binary systems. Material piles up on top of the white dwarf star under mildly degenerate conditions, driving a thermonuclear runaway. The…

Solar and Stellar Astrophysics · Physics 2018-05-23 Joana Figueira , Jordi Jose , Enrique Garcia-Berro , Simon W. Campbell , Domingo Garcia-Senz , Shazrene Mohamed

We present two further classical novae, V906 Car and V5668 Sgr, that show jets and accretion disc spectral signatures in their H-alpha complexes throughout the first 1000 days following their eruptions. From extensive densely time-sampled…

High Energy Astrophysical Phenomena · Physics 2021-06-11 Dominic McLoughlin , Katherine M. Blundell , Steven Lee , Chris McCowage

A high-resolution spectroscopic survey of postoutburst novae reveals short-lived heavy element absorption systems in a majority of novae near maximum light, having expansion velocities of 400-1000 km/s and velocity dispersions between…

Astrophysics · Physics 2009-11-13 Robert Williams , Elena Mason , Massimo Della Valle , Alessandro Ederoclite

Context. Classical novae are thermonuclear explosions that take place in the envelopes of accreting white dwarfs in stellar binary systems. The material transferred onto the white dwarf piles up under degenerate conditions, driving a…

Solar and Stellar Astrophysics · Physics 2016-09-21 Jordi Jose , Ghina M. Halabi , Mounib F. El Eid

Novae are thermonuclear explosions on the surface of accreting white dwarfs and are key laboratories for studying explosive nucleosynthesis, particle acceleration, shock physics, and binary evolution. Despite major progress driven by…

Classical novae are explosive phenomena that take place in stellar binary systems. They are powered by mass transfer from a low-mass, main sequence star onto a white dwarf. The material piles up under degenerate conditions and a…

Solar and Stellar Astrophysics · Physics 2015-05-20 Jordi Casanova , Jordi Jose , Enrique Garcia-Berro , Alan Calder , Steven N. Shore

Novae have been reported as transients for more than two thousand years. Their bright optical outbursts are the result of explosive nuclear burning of gas accreted from a binary companion onto a white dwarf. Novae containing a white dwarf…

Solar and Stellar Astrophysics · Physics 2015-09-29 Julian P. Osborne

Classical nova explosions and type I X-ray bursts are the most frequent types of thermonuclear stellar explosions in the Galaxy. Both phenomena arise from thermonuclear ignition in the envelopes of accreting compact objects in close binary…

Solar and Stellar Astrophysics · Physics 2014-01-22 A. Parikh , J. Jose , G. Sala

The impact of nova eruptions on the long-term evolution of Cataclysmic Variables(CVs) is one of the least understood and intensively discussed topics in the field. Acrucial ingredient to improve with this would be to establish a large…

Solar and Stellar Astrophysics · Physics 2020-11-18 I. Fuentes-Morales , C. Tappert , M. Zorotovic , N. Vogt , E. C. Puebla , M. R. Schreiber , A. Ederoclite , L. Schmidtobreick

Classical novae are phenomena caused by explosive hydrogen burning on an accreting white dwarf. So far, only one classical nova has been identified in X-rays before the actual optical outburst occurred (V2487 Oph). The recently discovered…

Classical novae are the most common astrophysical thermonuclear explosions, occurring on the surfaces of white dwarf stars accreting gas from companions in binary star systems. Novae typically expel ~10^(-4) solar masses of material at…

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