X-Ray Spectroscopy of the Classical Nova V458 Vulpeculae with Suzaku
arXiv:0810.3077 · doi:10.1093/pasj/61.sp1.S69
Abstract
We conducted a target of opportunity X-ray observation of the classical nova V458 Vulpeculae 88 days after the explosion using the Suzaku satellite. With a 20 ks exposure, the X-ray Imaging Spectrometer detected X-ray emission significantly harder than typical super-soft source emission. The X-ray spectrum shows K lines from N, Ne, Mg, Si, and S, and L-series emission from Fe in highly ionized states. The spectrum can be described by a single temperature (0.64 keV) thin thermal plasma model in collisional equilibrium with a hydrogen-equivalent extinction column density of ~3e21/cm2, a flux of ~1e-12 erg/s/cm2, and a luminosity of ~6e34 erg/s in the 0.3-3.0 keV band at an assumed distance of 13 kpc. We found a hint of an enhancement of N and deficiencies of O and Fe relative to other metals. The observed X-ray properties can be interpreted as the emission arising from shocks of ejecta from an ONe-type nova.
Accepted for publication in PASJ (9 pages, 4 Postscript figures)
References in corpus (10)
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- A planetary nebula around nova V458 Vul undergoing flash ionization
- Suzaku wide-band observations of SN 1006
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- XMM-Newton observations of Nova Sgr 1998
Cited by in corpus (13)
- Swift X-Ray Observations of Classical Novae. II. The Super Soft Source sample
- A Prediction Formula of Supersoft X-ray Phase of Classical Novae
- Swift X-ray and UV monitoring of the Classical Nova V458 Vul (Nova Vul 2007)
- Novae Ejecta as Discrete Adiabatically Expanding Globules
- Suzaku Detection of Super-hard X-ray Emission from the Classical Nova V2491 Cygni
- X-ray Study of Rekindled Accretion in the Classical Nova V2491 Cygni
- Discovery of X-ray Emission in the Old Classical Nova DK Lacertae
- An HI shell-like structure associated with nova V458 Vulpeculae?
- Spectroscopic Study of the Envelope of the Hybrid Nova V458 Vul and Surrounding Nebula
- Spectro-interferometric observations of classical nova V458 Vul 2007
- X-ray Development of the Classical Nova V2672 Ophiuchi with Suzaku
- Beginning of the Super-Soft Phase of the Classical Nova V2491 Cygni
- Astrophysical Fluids of Novae: High Resolution Pre-decay X-ray spectrum of V4743 Sagittarii