A universal decline law of classical novae. IV. V838 her (1991): A very massive white dwarf

Mariko Kato; Izumi Hachisu; Angelo Cassatella

doi:10.1088/0004-637X/704/2/1676

A universal decline law of classical novae. IV. V838 her (1991): A very massive white dwarf

Mariko Kato, Izumi Hachisu, Angelo Cassatella

Research output: Contribution to journal › Article › peer-review

28 Citations (Scopus)

Abstract

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 outbursts, we model the optical light curves with free-free emission and the UV 1455 Å light curves with blackbody emission. Our models of 1.35 0.02 M _⊙ WD simultaneously reproduce the optical and UV 1455 observations. The mass lost by the wind is ΔM _wind ∼ 2 × 10^-6 M _⊙. We provide new determinations of the reddening, E(B - V) = 0.53 0.05, and of the distance, 2.7±0.5 kpc.

Original language	English
Pages (from-to)	1676-1688
Number of pages	13
Journal	Astrophysical Journal
Volume	704
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/704/2/1676
Publication status	Published - 2009
Externally published	Yes

Keywords

Cataclysmic variables
Novae
Stars: individual (V838 Herculis)
Stars: mass loss
Ultraviolet: stars
White dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/704/2/1676

Cite this

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title = "A universal decline law of classical novae. IV. V838 her (1991): A very massive white dwarf",

abstract = "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 outbursts, we model the optical light curves with free-free emission and the UV 1455 {\AA} light curves with blackbody emission. Our models of 1.35 0.02 M ⊙ WD simultaneously reproduce the optical and UV 1455 observations. The mass lost by the wind is ΔM wind ∼ 2 × 10-6 M ⊙. We provide new determinations of the reddening, E(B - V) = 0.53 0.05, and of the distance, 2.7±0.5 kpc.",

keywords = "Cataclysmic variables, Novae, Stars: individual (V838 Herculis), Stars: mass loss, Ultraviolet: stars, White dwarfs",

author = "Mariko Kato and Izumi Hachisu and Angelo Cassatella",

year = "2009",

doi = "10.1088/0004-637X/704/2/1676",

language = "English",

volume = "704",

pages = "1676--1688",

journal = "Astrophysical Journal",

issn = "0004-637X",

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number = "2",

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TY - JOUR

T1 - A universal decline law of classical novae. IV. V838 her (1991)

T2 - A very massive white dwarf

AU - Kato, Mariko

AU - Hachisu, Izumi

AU - Cassatella, Angelo

PY - 2009

Y1 - 2009

N2 - 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 outbursts, we model the optical light curves with free-free emission and the UV 1455 Å light curves with blackbody emission. Our models of 1.35 0.02 M ⊙ WD simultaneously reproduce the optical and UV 1455 observations. The mass lost by the wind is ΔM wind ∼ 2 × 10-6 M ⊙. We provide new determinations of the reddening, E(B - V) = 0.53 0.05, and of the distance, 2.7±0.5 kpc.

AB - 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 outbursts, we model the optical light curves with free-free emission and the UV 1455 Å light curves with blackbody emission. Our models of 1.35 0.02 M ⊙ WD simultaneously reproduce the optical and UV 1455 observations. The mass lost by the wind is ΔM wind ∼ 2 × 10-6 M ⊙. We provide new determinations of the reddening, E(B - V) = 0.53 0.05, and of the distance, 2.7±0.5 kpc.

KW - Cataclysmic variables

KW - Novae

KW - Stars: individual (V838 Herculis)

KW - Stars: mass loss

KW - Ultraviolet: stars

KW - White dwarfs

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DO - 10.1088/0004-637X/704/2/1676

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SN - 0004-637X

VL - 704

SP - 1676

EP - 1688

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

A universal decline law of classical novae. IV. V838 her (1991): A very massive white dwarf

Abstract

Keywords

ASJC Scopus subject areas

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