English
Related papers

Related papers: A Light Curve Analysis of 32 Recent Galactic Novae…

200 papers

For Galactic novae, I calculate and collect a comprehensive catalog of 208 measures of white dwarf (WD) masses ($M_{\rm WD}$) and 232 measures of average $V$ magnitudes in quiescence ($V_q$). These are collected into a comprehensive catalog…

Solar and Stellar Astrophysics · Physics 2025-11-10 Bradley E. Schaefer

We propose a modified color-magnitude diagram for novae in outburst, i.e., $(B-V)_0$ versus $(M_V-2.5 \log f_{\rm s})$, where $f_{\rm s}$ is the timescaling factor of a (target) nova against a comparison (template) nova, $(B-V)_0$ is the…

Solar and Stellar Astrophysics · Physics 2019-03-06 Izumi Hachisu , Mariko Kato

Light curves and color evolutions of two classical novae can be largely overlapped if we properly squeeze or stretch the timescale of a target nova against that of a template nova by $t'=t/f_{\rm s}$. Then the brightness of the target nova…

Solar and Stellar Astrophysics · Physics 2021-03-23 Izumi Hachisu , Mariko Kato

V959 Mon is one of the gamma-ray detected novae. It was optically discovered about 50 days after the gamma-ray detection due to proximity to the Sun. The nova speed class is unknown because of lack of the earliest half of optical light…

Solar and Stellar Astrophysics · Physics 2018-05-23 Izumi Hachisu , Mariko Kato

We calculate many different nova light curves for a variety of white dwarf masses and chemical compositions, with the assumption that free-free emission from optically thin ejecta dominates the continuum flux. We show that all these light…

Astrophysics · Physics 2009-11-11 Izumi Hachisu , Mariko Kato

We analyzed optical, UV, and X-ray light curves of 14 recurrent and very fast novae in our galaxy, Magellanic Clouds, and M31, and obtained their distances and white dwarf (WD) masses. Among the 14 novae, we found that eight novae host very…

Solar and Stellar Astrophysics · Physics 2018-07-18 Izumi Hachisu , Mariko Kato

The rising phase toward the optical maximum of a classical nova is one of the last frontiers of nova study. Constructing free-free emission model light curves based on our fully self-consistent nova explosion models, we present several…

Solar and Stellar Astrophysics · Physics 2025-11-24 Mariko Kato , Izumi Hachisu , Hideyuki Saio

Light curve analysis of decay phase of nova outburst are summarized. Nova duration is determined by the strong wind mass-loss which depends only on the white dwarf mass. Fast novae correspond very massive white dwarfs and very slow novae…

Astrophysics · Physics 2007-05-23 Mariko Kato

We present a unified model of optical and ultraviolet (UV) light curves for one of the fastest classical novae, V838 Herculis (Nova Herculis 1991), and estimate its white dwarf (WD) mass. Based on an optically thick wind theory of nova…

Solar and Stellar Astrophysics · Physics 2014-11-20 Mariko Kato , Izumi Hachisu , Angelo Cassatella

I derive the overall best distances for all 402 known galactic novae, and I collect their many properties. The centrepiece is the 74 novae with accurate parallaxes from the new Gaia data release. For the needed priors, I have collected 171…

Solar and Stellar Astrophysics · Physics 2022-10-26 Bradley E. Schaefer

We analyzed light curves of seven relatively slower novae, PW Vul, V705 Cas, GQ Mus, RR Pic, V5558 Sgr, HR Del, and V723 Cas, based on an optically thick wind theory of nova outbursts. For fast novae, free-free emission dominates the…

Solar and Stellar Astrophysics · Physics 2015-06-23 Izumi Hachisu , Mariko Kato

We present a light curve model for the super-Eddington luminosity phase of five classical novae observed with IUE. Optical and UV light curves are calculated based on the optically thick wind theory with a reduced effective opacity for a…

Astrophysics · Physics 2008-11-26 Mariko Kato , Izumi Hachisu

In this study, a new Galactic novae catalogue is introduced collecting important parameters of these sources such as their light curve parameters, classifications, full width half maximum (FWHM) of H$_\alpha$ line, distances and…

Solar and Stellar Astrophysics · Physics 2018-03-14 Aykut Özdönmez , Ergün Ege , Tolga Güver , Tansel Ak

The results of a two decade long $R$-band photometric survey of novae in M31 are presented. From these data, $R$-band light curves have been determined for 180 novae with data sufficient for estimating peak brightness and subsequent rate of…

Solar and Stellar Astrophysics · Physics 2024-04-09 J. Grace Clark , Kamil Hornoch , Allen W. Shafter , Hana Kučáková , Jan Vraštil , Peter Kušnirák , Marek Wolf

Optical and infrared light-curves of classical novae are approximately homologous among various white dwarf (WD) masses and chemical compositions when free-free emission from optically thin ejecta dominates the continuum flux of novae. Such…

Astrophysics · Physics 2011-02-11 Izumi Hachisu , Mariko Kato

Near-IR data of Classical Novae contain useful information about the ejected gas mass and the thermal emission by dust formed during eruption, and provide independent methods to classify the objects according to the colour of their…

Astrophysics of Galaxies · Physics 2015-06-15 R. K. Saito , D. Minniti , R. Angeloni , M. Catelan , J. C. Beamin , J. Borissova , I. Dekany , E. Kerins , R. Kurtev , R. E. Mennickent

We propose a theory for the MMRD relation of novae, using free-free emission model light curves built on the optically thick wind theory. We calculated $(t_3,M_{V,\rm max})$ for various sets of $(\dot M_{\rm acc}, M_{\rm WD})$, where…

Solar and Stellar Astrophysics · Physics 2020-10-21 Izumi Hachisu , Hideyuki Saio , Mariko Kato , Martin Henze , Allen W. Shafter

The classical nova V2491 Cyg was once suggested to be a recurrent nova. We have broadly reproduced the light curve of V2491 Cyg by a nova outburst model on a cold $1.36~M_\odot$ white dwarf (WD), which strongly suggests that V2491 Cyg is a…

Solar and Stellar Astrophysics · Physics 2021-07-07 Mariko Kato , Hideyuki Saio , Izumi Hachisu

We have examined the outburst tracks of 40 novae in the color-magnitude diagram (intrinsic B-V color versus absolute V magnitude). After reaching the optical maximum, each nova generally evolves toward blue from the upper-right to the…

Solar and Stellar Astrophysics · Physics 2016-04-27 Izumi Hachisu , Mariko Kato

We present the first light curve analysis of Population II novae that appeared in M31 globular clusters. Our light curve models, based on the optically thick wind theory, reproduce well both the X-ray turn-on and turnoff times with the…

Solar and Stellar Astrophysics · Physics 2015-06-17 Mariko Kato , Izumi Hachisu , Martin Henze
‹ Prev 1 2 3 10 Next ›