SMSS J130522.47−293113.0: a high-latitude stellar X-ray source with pc-scale outflow relics?
Article
Article Title | SMSS J130522.47−293113.0: a high-latitude stellar X-ray source with pc-scale outflow relics? |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Da Costa, G. S. (Author), Soria, R. (Author), Farrell, S. A. (Author), Bayliss, D. (Author), Bessell, M. S. (Author), Vogt, F. P. A. (Author), Zhou, G. (Author), Points, S. D. (Author), Beers, T. C. (Author), Lopez-Sanchez, A. R. (Author), Bannister, K. W. (Author), Bell, M. (Author), Hancock, P. J. (Author), Burlon, D. (Author), Gaensler, B. M. (Author), Sadler, E. M. (Author), Tingay, S. (Author), Keller, S. C. (Author), Schmidt, B. P. (Author) and Tisserand, P. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 477 (1), pp. 766-779 |
Number of Pages | 14 |
Year | 2018 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/sty680 |
Web Address (URL) | https://academic.oup.com/mnras/article/477/1/766/4939294 |
Abstract | We report the discovery of an unusual stellar system SMSS J130522.47-293113.0. The optical spectrum is dominated by a blue continuum together with emission lines of hydrogen, neutral, and ionized helium, and the NIII, CIII blend at ~4640-4650 Å. The emission-line profiles vary in strength and position on time-scales as short as 1 d, while optical photometry reveals fluctuations of as much as ~0.2mag in g on time-scales as short as 10-15 min. The system is a weak X-ray source (f0.3-10 = (1.2 ± 0.1) × 10-13 ergs cm2 s-1 in the 0.3-10 keV band) but is not detected at radio wavelengths (3s upper limit of 50 μJy at 5.5 GHz). The most intriguing property of the system, however, is the existence of two 'blobs', a few arcsec in size, that are symmetrically located 3'. 8 (2.2 pc for our preferred system distance of ~2 kpc) each side of the central object. The blobs are detected in optical and near-IR broad-band images but do not show any excess emission in Hα images. We discuss the interpretation of the system, suggesting that the central object is most likely a nova-like CV, and that the blobs are relics of a pc-scale accretion-powered collimated outflow. |
Keywords | stars: activity; stars: emission-line; Be; stars: jets; novae; cataclysmic variables; X-rays: binaries; Astrophysics - High Energy; Astrophysical Phenomena |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Australian National University |
Chinese Academy of Sciences, China | |
University of Sydney | |
Cerro Tololo Inter-American Observatory, Chile | |
University of Notre Dame, United States | |
Australian Astronomical Observatory, Australia | |
Commonwealth Scientific and Industrial Research Organisation (CSIRO), Australia | |
Curtin University | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6x38/smss-j130522-47-293113-0-a-high-latitude-stellar-x-ray-source-with-pc-scale-outflow-relics
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