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Title: EXPANDED VERY LARGE ARRAY NOVA PROJECT OBSERVATIONS OF THE CLASSICAL NOVA V1723 AQUILAE

Abstract

We present radio light curves and spectra of the classical nova V1723 Aql obtained with the Expanded Very Large Array (EVLA). This is the first paper to showcase results from the EVLA Nova Project, which comprises a team of observers and theorists utilizing the greatly enhanced sensitivity and frequency coverage of EVLA radio observations, along with observations at other wavelengths, to reach a deeper understanding of the energetics, morphology, and temporal characteristics of nova explosions. Our observations of V1723 Aql span 1-37 GHz in frequency, and we report on data from 14 to 175 days following the time of the nova explosion. The broad frequency coverage and frequent monitoring show that the radio behavior of V1723 Aql does not follow the classic Hubble-flow model of homologous spherically expanding thermal ejecta. The spectra are always at least partially optically thin, and the flux rises on faster timescales than can be reproduced with linear expansion. Therefore, any description of the underlying physical processes must go beyond this simple picture. The unusual spectral properties and light curve evolution might be explained by multiple emitting regions or shocked material. Indeed, X-ray observations from Swift reveal that shocks are likely present.

Authors:
; ; ; ;  [1]
  1. National Radio Astronomy Observatory, Socorro, NM 87801 (United States)
Publication Date:
OSTI Identifier:
21565472
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 739; Journal Issue: 1; Other Information: DOI: 10.1088/2041-8205/739/1/L6; Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EXPLOSIONS; MONITORING; NOVAE; WHITE DWARF STARS; BINARY STARS; DWARF STARS; ERUPTIVE VARIABLE STARS; STARS; VARIABLE STARS

Citation Formats

Krauss, Miriam I., Chomiuk, Laura, Rupen, Michael, Roy, Nirupam, and Mioduszewski, Amy J., E-mail: mkrauss@nrao.edu, E-mail: lchomiuk@nrao.edu, E-mail: mrupen@nrao.edu, E-mail: nroy@nrao.edu. EXPANDED VERY LARGE ARRAY NOVA PROJECT OBSERVATIONS OF THE CLASSICAL NOVA V1723 AQUILAE. United States: N. p., 2011. Web. doi:10.1088/2041-8205/739/1/L6.
Krauss, Miriam I., Chomiuk, Laura, Rupen, Michael, Roy, Nirupam, & Mioduszewski, Amy J., E-mail: mkrauss@nrao.edu, E-mail: lchomiuk@nrao.edu, E-mail: mrupen@nrao.edu, E-mail: nroy@nrao.edu. EXPANDED VERY LARGE ARRAY NOVA PROJECT OBSERVATIONS OF THE CLASSICAL NOVA V1723 AQUILAE. United States. doi:10.1088/2041-8205/739/1/L6.
Krauss, Miriam I., Chomiuk, Laura, Rupen, Michael, Roy, Nirupam, and Mioduszewski, Amy J., E-mail: mkrauss@nrao.edu, E-mail: lchomiuk@nrao.edu, E-mail: mrupen@nrao.edu, E-mail: nroy@nrao.edu. Tue . "EXPANDED VERY LARGE ARRAY NOVA PROJECT OBSERVATIONS OF THE CLASSICAL NOVA V1723 AQUILAE". United States. doi:10.1088/2041-8205/739/1/L6.
@article{osti_21565472,
title = {EXPANDED VERY LARGE ARRAY NOVA PROJECT OBSERVATIONS OF THE CLASSICAL NOVA V1723 AQUILAE},
author = {Krauss, Miriam I. and Chomiuk, Laura and Rupen, Michael and Roy, Nirupam and Mioduszewski, Amy J., E-mail: mkrauss@nrao.edu, E-mail: lchomiuk@nrao.edu, E-mail: mrupen@nrao.edu, E-mail: nroy@nrao.edu},
abstractNote = {We present radio light curves and spectra of the classical nova V1723 Aql obtained with the Expanded Very Large Array (EVLA). This is the first paper to showcase results from the EVLA Nova Project, which comprises a team of observers and theorists utilizing the greatly enhanced sensitivity and frequency coverage of EVLA radio observations, along with observations at other wavelengths, to reach a deeper understanding of the energetics, morphology, and temporal characteristics of nova explosions. Our observations of V1723 Aql span 1-37 GHz in frequency, and we report on data from 14 to 175 days following the time of the nova explosion. The broad frequency coverage and frequent monitoring show that the radio behavior of V1723 Aql does not follow the classic Hubble-flow model of homologous spherically expanding thermal ejecta. The spectra are always at least partially optically thin, and the flux rises on faster timescales than can be reproduced with linear expansion. Therefore, any description of the underlying physical processes must go beyond this simple picture. The unusual spectral properties and light curve evolution might be explained by multiple emitting regions or shocked material. Indeed, X-ray observations from Swift reveal that shocks are likely present.},
doi = {10.1088/2041-8205/739/1/L6},
journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 1,
volume = 739,
place = {United States},
year = {2011},
month = {9}
}