Abstract
This chapter presents the optical photometry of superoutbursts in the three WZ Sge-type dwarf novae ASASSN-15jd, ASASSN-16dt, and ASASSN-16hg. They commonly showed a luminosity dip in the middle of the plateau stage in their main superoutbursts. Also, it was confirmed that they have some observational features characteristic to the candidates for the period bouncer which has an extremely low-mass secondary star. We succeeded to estimate the binary mass ratio of ASASSN-16dt to be 0.036(2) by using stage A superhumps, which is much smaller than that of the systems at the period minimum. Summarizing these results, all of the three systems are possible candidates for the period-bouncer. The expected weak tidal effect by very low mass secondaries in these systems would be responsible for the slow growth of the tidal instability in the disk. We proposed that the luminosity dip in the plateau stage is attributed to the slow development of the eccentricity in the disk.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Notes
References
Littlefair, S. P., Dhillon, V. S., Marsh, T. R., Gänsicke, B. T., Southworth, J., & Watson, C. A. (2006). A brown dwarf mass donor in an accreting binary. Science, 314, 1578.
Littlefair, S. P., Dhillon, V. S., Marsh, T. R., Gänsicke, B. T., Southworth, J., Baraffe, I., et al. (2008). On the evolutionary status of short-period cataclysmic variables. MNRAS, 388, 1582.
Hernández Santisteban, J. V., et al. (2016). An irradiated brown-dwarf companion to an accreting white dwarf. Nature, 533, 366.
Unda-Sanzana, E., et al. (2008). GD 552: A cataclysmic variable with a brown dwarf companion? MNRAS, 388, 889.
Aviles, A., et al. (2010). SDSS J123813.73-033933.0: A cataclysmic variable evolved beyond the period minimum. ApJ, 711, 389.
Kato, T., & Osaki, Y. (2013). New method to estimate binary mass ratios by using superhumps. PASJ, 65, 115.
Nakata, C., et al. (2013). WZ Sge-type dwarf novae with multiple rebrightenings: MASTER OT J211258.65\(+\)242145.4 and MASTER OT J203749.39\(+\)552210.3. PASJ, 65, 117.
Nakata, C., et al. (2014). OT J075418.7\(+\)381225 and OT J230425.8\(+\)062546: Promising candidates for the period bouncer. PASJ, 66, 116.
Kato, T. (2015). WZ Sge-type dwarf novae. PASJ, 67, 108.
Henden, A. A., Templeton, M., Terrell, D., Smith, T. C., Levine, S., & Welch, D. (2016) VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016) 2016, VizieR Online Data Catalog, 2336
Kimura, M., et al. (2016) ASASSN-15jd: WZ Sge-type star with intermediate superoutburst between single and double ones. PASJ, 68, 55.
Kato, T. (2002). On the origin of early superhumps in WZ Sge-type stars. PASJ, 54, L11.
Ishioka, R., et al. (2002). First detection of the growing humps at the rapidly rising stage of dwarf novae AL Com and WZ Sge. A&A, 381, L41.
Kimura, M., et al. (2018). ASASSN-16dt and ASASSN-16hg: Promising candidate period bouncers. PASJ, 70, 47.
Kato, T., Monard, B., Hambsch, F.-J., Kiyota, S., & Maehara, H. (2013). Sss j122221.7\(-\)311523: Double superoutburst in a best candidate period bouncer. PASJ, 65, L11.
Neustroev, V. V., et al. (2017) The remarkable outburst of the highly evolved post-period-minimum dwarf nova SSS J122221.7-311525. MNRAS, 467, 597.
Katysheva, N. (2013). Multicolour investigation of PNV J1842+4837-A new WZ Sge-type dwarf nova in Draco, et al. Central European Astrophysical Bulletin, 37, 335.
Kato, T., et al. (2014) Survey of period variations of superhumps in SU UMa-type dwarf novae. V: The fifth year (2012–2013). PASJ, 66, 30.
Kato, T., et al. (2015) Survey of period variations of superhumps in SU UMa-type dwarf novae. VII. The seventh year (2014–2015). PASJ, 67, 105.
Kato, T., et al. (2016). Survey of period variations of superhumps in SU UMa-type dwarf novae. VIII. The eighth year (2015–2016). PASJ, 68, 65.
Kato, T., et al. (2017). Survey of period variations of superhumps in SU UMa-type dwarf novae. IX. The ninth year (2016–2017). PASJ, 69, 75.
Knigge, C., Baraffe, I., & Patterson, J. (2011). The evolution of cataclysmic variables as revealed by their Donor Stars. ApJ, 194, 28.
McAllister, M. J., et al. (2017). SDSS J105754.25+275947.5: A period-bounce eclipsing cataclysmic variable with the lowest-mass donor yet measured. MNRAS, 467, 1024.
Savoury, C. D. J., et al. (2011). Cataclysmic variables below the period gap: mass determinations of 14 eclipsing systems. MNRAS, 415.
Rappaport, S., et al. (2017). WD 1202-024: the shortest-period pre-cataclysmic variable. MNRAS, 471, 948.
Politano, M. (2004). The formation of cataclysmic variables with Brown Dwarf secondaries. ApJ, 604, 817.
Osaki, Y. (1996). Dwarf-nova outbursts. PASP, 108, 39.
Lubow, S. H. (1991). A model for tidally driven eccentric instabilities in fluid disks. ApJ, 381, 259.
Nogami, D., Kato, T., Baba, H., Matsumoto, K., Arimoto, J., Tanabe, K., et al. (1995). superoutburst of the WZ Sagittae-type dwarf nova AL Comae Berenices 1997. ApJ, 490, 840.
Uemura, M., Kato, T., Ohshima, T., & Maehara, H. (2012). Reconstruction of the structure of accretion disks in dwarf novae from the multi-band light curves of early superhumps. PASJ, 64, 92.
Osaki, Y., & Meyer, F. (2002). Early humps in WZ Sge stars. A&A, 383, 574.
Osaki, Y., & Meyer, F. (2003). Is evidence for enhanced mass transfer during dwarf-nova outbursts well substantiated? A&A, 401, 325.
Kato, T., et al. (2009). Survey of period variations of superhumps in SU UMa-type dwarf novae. PASJ, 61, S395.
Kato, T., et al. (2012). Survey of period variations of superhumps in SU UMa-type dwarf novae. III. The third year (2010–2011). PASJ, 64, 21.
Steeghs, D., Howell, S. B., Knigge, C., Gänsicke, B. T., Sion, E. M., & Welsh, W. F. (2007). Dynamical constraints on the component masses of the cataclysmic variable WZ Sagittae. ApJ, 667, 442.
Kato, T., et al. (2010). Survey of period variations of superhumps in SU UMa-type dwarf novae. II The second year (2009–2010). PASJ, 62, 1525.
Kato, T., et al. (2013). Survey of period variations of superhumps in SU UMa-type dwarf novae. IV: The fourth year (2011–2012). PASJ, 65, 23.
Kato, T., et al. (2014). Survey of period variations of superhumps in SU UMa-type dwarf novae. VI: The fifth year (2013–2014). PASJ, 66, 90.
Hirose, M., & Osaki, Y. (1990) Hydrodynamic simulations of accretion disks in cataclysmic variables–superhump phenomenon in SU UMa stars. PASJ, 42, 135.
Ichikawa, S., & Osaki, Y. (1994). Tidal torques on accretion disks in close binary systems. PASJ, 46, 621.
Osaki, Y. (1989). A model for the superoutburst phenomenon of SU Ursae Majoris stars. PASJ, 41, 1005.
Balbus, S. A., & Hawley, J. F. (1991). A powerful local shear instability in weakly magnetized disks. I–linear analysis. ApJ, 376, 214.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
Copyright information
© 2020 The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this chapter
Cite this chapter
Kimura, M. (2020). Outburst Properties of Possible Candidates for Period Bouncers. In: Observational and Theoretical Studies on Dwarf-nova Outbursts. Springer Theses. Springer, Singapore. https://doi.org/10.1007/978-981-15-8912-6_3
Download citation
DOI: https://doi.org/10.1007/978-981-15-8912-6_3
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-8911-9
Online ISBN: 978-981-15-8912-6
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)