Evento
Spectral Analysis of Binary Pre-white Dwarf Systems
Finch, N. L.; Braker, I. P.; Reindl, N.; Barstow, M. A.; Casewell, S. L.; Burleigh, M.; Kupfer, T.; Kilkenny, D.; Geier, S.; Schaffenroth, V.; Schaffenroth, V.; Miller Bertolami, Marcelo Miguel
; Taubenberger, S.; Freudenthal, J.
Tipo del evento:
Conferencia
Nombre del evento:
Radiative Signatures from the Cosmos: A Conference in Honor of Ivan Hubeny
Fecha del evento:
10/2019
Institución Organizadora:
Universidad de Paris;
Título del Libro:
Radiative Signatures from the Cosmos
Editorial:
Astronomical Society of the Pacific
ISBN:
978-1-58381-925-8
Idioma:
Inglés
Clasificación temática:
Resumen
Short period double degenerate white dwarf (WD) binaries with periodsof less than ∼1 day are considered to be one of the likely progenitors of type Ia super-novae. These binaries have undergone a period of common envelope evolution. If thecore ignites helium before the envelope is ejected, then a hot subdwarf remains priorto contracting into a WD. Here we present a comparison of two very rare systems thatcontain two hot subdwarfs in short period orbits. We provide a quantitative spectro-scopic analysis of the systems using synthetic spectra from state-of-the-art non-LTEmodels to constrain the atmospheric parameters of the stars. We also use these modelsto determine the radial velocities, and thus calculate dynamical masses for the stars ineach system.
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Eventos(IALP)
Eventos de INST.DE ASTROFISICA LA PLATA
Eventos de INST.DE ASTROFISICA LA PLATA
Citación
Spectral Analysis of Binary Pre-white Dwarf Systems; Radiative Signatures from the Cosmos: A Conference in Honor of Ivan Hubeny; Paris; Francia; 2019; 1-6
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