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Thomas Bensby. Profile photo.

Thomas Bensby

Senior lecturer

Thomas Bensby. Profile photo.

A Detailed Observational Analysis of V1324 Sco, the Most Gamma-Ray-luminous Classical Nova to Date

Author

  • Thomas Finzell
  • Laura Chomiuk
  • Brian D. Metzger
  • Frederick M. Walter
  • Justin D. Linford
  • Koji Mukai
  • Thomas Nelson
  • Jennifer H.S. Weston
  • Yong Zheng
  • Jennifer L. Sokoloski
  • Amy Mioduszewski
  • Michael P. Rupen
  • Subo Dong
  • Sumner Starrfield
  • C. C. Cheung
  • Charles E. Woodward
  • Gregory B. Taylor
  • Terry Bohlsen
  • Christian Buil
  • Jose Prieto
  • R. Mark Wagner
  • Thomas Bensby
  • I. A. Bond
  • T. Sumi
  • D. P. Bennett
  • F. Abe
  • N. Koshimoto
  • D. Suzuki
  • P. J. Tristram
  • Grant W. Christie
  • Tim Natusch
  • Jennie McCormick
  • Jennifer Yee
  • Andy Gould

Summary, in English

It has recently been discovered that some, if not all, classical novae emit GeV gamma-rays during outburst, but the mechanisms involved in the production ofgamma-rays are still not well understood. We present here a comprehensive multiwavelength data set - from radio to X-rays - for the most gamma-ray-luminous classical nova to date, V1324 Sco. Using this data set, we show that V1324 Sco is a canonical dusty Fe ii-type nova, with a maximum ejecta velocity of 2600 km s-1 and an ejecta mass of a few × 10-5 M. There is also evidence for complex shock interactions, including a double-peaked radio light curve which shows high brightness temperatures at early times. To explore why V1324 Sco was so gamma-ray luminous, we present a model of the nova ejecta featuring strong internal shocks and find that higher gamma-ray luminosities result from higher ejecta velocities and/or mass-loss rates. Comparison of V1324 Sco with other gamma-ray-detected novae does not show clear signatures of either, and we conclude that a larger sample of similarly well-observed novae is needed to understand the origin and variation of gamma-rays in novae.

Department/s

  • Lund Observatory - Undergoing reorganization

Publishing year

2018-01-10

Language

English

Publication/Series

Astrophysical Journal

Volume

852

Issue

2

Document type

Journal article

Publisher

American Astronomical Society

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • gamma rays: stars
  • novae, cataclysmic variables
  • radio continuum: stars
  • stars: individual (V1324 Sco)

Status

Published

ISBN/ISSN/Other

  • ISSN: 0004-637X