A MeerKAT survey of nearby nova-like cataclysmic variables
| Autor: | M. L. Pretorius, N. Castro Segura, Kunal Mooley, David R. Williams, Ian Heywood, Antonia Rowlinson, Benjamin Stappers, R. P. Armstrong, Ralph A. M. J. Wijers, Paul J. Groot, D. M. Hewitt, Vanessa McBride, A. J. van der Horst, Christian Knigge, Rob Fender, Elmar Koerding, Assaf Horesh, E. Tremou, James Miller-Jones, Patrick Woudt |
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| Přispěvatelé: | High Energy Astrophys. & Astropart. Phys (API, FNWI), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Astronomy
Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Power law Luminosity stars: jets X-rays: binaries accretion 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics white dwarfs Physics novae High Energy Astrophysical Phenomena (astro-ph.HE) cataclysmic variables Accretion (meteorology) 010308 nuclear & particles physics Spectral density White dwarf Astronomy and Astrophysics Nova (laser) accretion discs Neutron star Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science System parameters Astrophysics - High Energy Astrophysical Phenomena [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] radio continuum: stars |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 496(3), 2542-2557. Oxford University Press Monthly Notices of the Royal Astronomical Society, 496, 2542-2557 Monthly Notices of the Royal Astronomical Society, 496, 3, pp. 2542-2557 Monthly Notices of the Royal Astronomical Society Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 496 (3), pp.2542-2557. ⟨10.1093/mnras/staa1747⟩ |
| ISSN: | 0035-8711 1365-2966 |
| DOI: | 10.1093/mnras/staa1747⟩ |
| Popis: | We present the results of MeerKAT radio observations of eleven nearby novalike cataclysmic variables. We have detected radio emission from IM Eri, RW Sex, V3885 Sgr and V603 Aql. While RW Sex, V3885 Sgr and V603 Aql had been previously detected, this is the first reported radio detection of IM Eri. Our observations have doubled the sample of non-magnetic CVs with sensitive radio data. We observe that at our radio detection limits, a specific optical luminosity $\gtrsim 2.2\times 10^{18}$ erg/s/Hz (corresponding to $M_V \lesssim 6.0$) is required to produce a radio detection. We also observe that the X-ray and radio luminosities of our detected novalikes are on an extension of the $L_{X} \propto L_{R}^{\sim 0.7}$ power law originally proposed for non-pulsating neutron star low-mass X-ray binaries. We find no other correlations between the radio emission and emission in other wavebands or any other system parameters for the existing sample of radio-detected non-magnetic CVs. We measure in-band (0.9-1.7 GHz) radio spectral indices that are consistent with reports from earlier work. Finally, we constructed broad spectral energy distributions for our sample from published multi-wavelength data, and use them to place constraints on the mass transfer rates of these systems. Comment: 16 pages, 9 figures, accepted to MNRAS |
| Databáze: | OpenAIRE |
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