RT Journal Article
T1 Total eclipse of the heart: the AM CVn Gaia14aae/ASSASN-14cn
A1 Campbell, H. C.
A1 Miguel Agustino, Enrique de
AB We report the discovery and characterization of a deeply eclipsingAMCVn-system, Gaia14aae(=ASSASN-14cn). Gaia14aae was identified independently by the All-Sky AutomatedSurvey for Supernovae (ASAS-SN; Shappee et al.) and by the Gaia Science Alerts project,during two separate outbursts. A third outburst is seen in archival Pan-STARRS-1 (PS1;Schlafly et al.; Tonry et al.; Magnier et al.) and ASAS-SN data. Spectroscopy reveals a hot,hydrogen-deficient spectrum with clear double-peaked emission lines, consistent with an accretingdouble-degenerate classification.We use follow-up photometry to constrain the orbitalparameters of the system. We find an orbital period of 49.71 min, which places Gaia14aaeat the long period extremum of the outbursting AM CVn period distribution. Gaia14aae isdominated by the light from its accreting white dwarf (WD). Assuming an orbital inclinationof 90◦ for the binary system, the contact phases of the WD lead to lower limits of 0.78 and0.015M  on the masses of the accretor and donor, respectively, and a lower limit on the massratio of 0.019. Gaia14aae is only the third eclipsingAMCVn star known, and the first in whichthe WD is totally eclipsed. Using a helium WD model, we estimate the accretor’s effectivetemperature to be 12 900 ± 200 K. The three outburst events occurred within four months ofeach other, while no other outburst activity is seen in the previous 8 yr of Catalina Real-timeTransient Survey (CRTS; Drake et al.), Pan-STARRS-1 and ASAS-SN data. This suggeststhat these events might be rebrightenings of the first outburst rather than individual events.
PB Oxford University Press
SN 0035-8711
SN 1365-2966 (electrónico)
YR 2015
FD 2015
LK http://hdl.handle.net/10272/11269
UL http://hdl.handle.net/10272/11269
LA eng
NO Campbell, H.C., Miguel Agustino, E... [et al.]: "Total eclipse of the heart: the AM CVn Gaia14aae/ASSASN-14cn". Monthly Notices of the Royal Astronomical Society. Vol. 452, págs. 1060-1067, (2015). DOI: 10.1093/mnras/stv1224
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026