Back to Search
Start Over
Bow shocks, nova shells, disc winds and tilted discs: the nova-like V341 Ara has it all
- Source :
- Castro Segura, N, Knigge, C, Acosta-Pulido, J A, Altamirano, D, del Palacio, S, Hernandez Santisteban, J V, Pahari, M, Rodriguez-Gil, P, Belardi, C, Buckley, D A H, Burleigh, M R, Childress, M, Fender, R P, Hewitt, D M, James, D J, Kuhn, R B, Kuin, N P M, Pepper, J, Ponomareva, A A, Pretorius, M L, Rodríguez, J E, Stassun, K G, Williams, D R A & Woudt, P A 2021, ' Bow shocks, nova shells, disc winds and tilted discs: the nova-like V341 Ara has it all ', Monthly Notices of the Royal Astronomical Society, vol. 501, no. 2, pp. 1951-1969 . https://doi.org/10.1093/mnras/staa2516, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET
- Publication Year :
- 2021
-
Abstract
- V341 Ara was recently recognised as one of the closest (d ~ 150 pc) and brightest (V~ 10) nova-like cataclysmic variables. This unique system is surrounded by a bright emission nebula, likely to be the remnant of a recent nova eruption. Embedded within this nebula is a prominent bow-shock, where the system's accretion disc wind runs into its own nova shell. In order to establish its fundamental properties, we present the first comprehensive multi-wavelength study of the system. Long-term photometry reveals quasi-periodic, super-orbital variations with a characteristic time-scale of 10-16 days and typical amplitude of ~1 mag. High-cadence photometry from TESS reveals for the first time both the orbital period and a "negative superhump" period. The latter is usually interpreted as the signature of a tilted accretion disc. We propose a recently developed disc instability model as a plausible explanation for the photometric behaviour. In our spectroscopic data, we clearly detect anti-phased absorption and emission line components. Their radial velocities suggest a high mass ratio, which in turn implies an unusually low white dwarf mass. We also constrain the wind mass-loss rate of the system from the spatially resolved [O iii] emission produced in the bow-shock; this can be used to test and calibrate accretion disc wind models. We suggest a possible association between V341 Ara and a "guest star" mentioned in Chinese historical records in AD1240. If this marks the date of the system's nova eruption, V341 Ara would be the oldest recovered nova of its class and an excellent laboratory for testing nova theory.<br />Accepted in MNRAS
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Accretion
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astronomy and Astrophysics
purl.org/becyt/ford/1.3 [https]
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
purl.org/becyt/ford/1 [https]
Shock waves
spectroscopic [Binaries]
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
0103 physical sciences
Novae, cataclysmic variables
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics - High Energy Astrophysical Phenomena
Winds, outflows
010303 astronomy & astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics::Galaxy Astrophysics
Accretion discs
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Castro Segura, N, Knigge, C, Acosta-Pulido, J A, Altamirano, D, del Palacio, S, Hernandez Santisteban, J V, Pahari, M, Rodriguez-Gil, P, Belardi, C, Buckley, D A H, Burleigh, M R, Childress, M, Fender, R P, Hewitt, D M, James, D J, Kuhn, R B, Kuin, N P M, Pepper, J, Ponomareva, A A, Pretorius, M L, Rodríguez, J E, Stassun, K G, Williams, D R A & Woudt, P A 2021, ' Bow shocks, nova shells, disc winds and tilted discs: the nova-like V341 Ara has it all ', Monthly Notices of the Royal Astronomical Society, vol. 501, no. 2, pp. 1951-1969 . https://doi.org/10.1093/mnras/staa2516, CONICET Digital (CONICET), Consejo Nacional de Investigaciones Científicas y Técnicas, instacron:CONICET
- Accession number :
- edsair.doi.dedup.....141bf331554df5104d38e5e50d5675eb