Bibcode
González-Hernández, J. I.; Ruiz-Lapuente, P.; Tabernero, H. M.; Montes, D.; Canal, R.; Méndez, J.; Bedin, L. R.
Referencia bibliográfica
Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8-12, 2014, in Teruel, Spain, ISBN 978-84-606-8760-3. A. J. Cenarro, F. Figueras, C. Hernández-Monteagudo, J. Trujillo Bueno, and L. Valdivielso (eds.), p. 488-493
Advertised on:
5
2015
Número de citas
1
Número de citas referidas
1
Descripción
We have been searching for surviving companions of progenitors of
Galactic Type-Ia supernovae, in particular SN 1572 and SN 1006. These
companion stars are expected to show peculiarities: (i) to be probably
more luminous than the Sun, (ii) to have high radial velocity and proper
motion, (iii) to be possibly enriched in metals from the SNIa ejecta,
and (iv) to be located at the distance of the SNIa remnant. We have been
characterizing possible candidate stars using high-resolution
spectroscopic data taken at 10m-Keck and 8.2m-VLT facilities. We have
identified a very promising candidate companion (Tycho G) for SN 1572
(see Ruiz-Lapuente et al. 2004; however for a different view see
Kerzendorf et al., 2012) but we have not found any candidate companion
for SN 1006, suggesting that SN event occurred in 1006 could have been
the result of the merging of two white dwarfs (see
González-Hernández et al., 2012). Adding these results to
the evidence from the other direct searches, the clear minority of cases
(20% or less) seem to disfavour the single-degenerate channel or that
preferentially the single-degenerate escenario would involve
main-sequence companions less massive than the Sun. Therefore, it
appears to be very important to continue investigating these and other
Galactic Type-Ia SNe such as the Johannes Kepler SN 1604.