Binary White Dwarfs in the Supernova Ia Progenitor Survey

R. Napiwotzki; C. Karl; G. Nelemans; L. Yungelson; N. Christlieb; H. Drechsel; U. Heber; D. Homeier; D. Koester; B. Leibundgut; T.R. Marsh; S. Moehler; A. Renzini; D. Reimers

Binary White Dwarfs in the Supernova Ia Progenitor Survey

R. Napiwotzki, C. Karl, G. Nelemans, L. Yungelson, N. Christlieb, H. Drechsel, U. Heber, D. Homeier, D. Koester, B. Leibundgut, T.R. Marsh, S. Moehler, A. Renzini, D. Reimers

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Abstract

We report results of a systematic radial velocity survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae: SPY (ESO Supernovae Ia Progenitor surveY). More than 1000 white dwarfs (WDs) and pre-white dwarfs were observed with the VLT. The aim of SPY is to perform a statistically significant test of the DD scenario. We give an overview of the project and follow-up results. The sample is used for two tests of the contempo- rary picture of close binary evolution leading to DDs. It is shown that the SPY observations of low mass He-core WDs (HeWDs) are inconsistent with the idea that they all reside in close binary systems. We carry out a model atmosphere analysis of WDs residing in double-lined binaries and estimate individual cooling ages. For a number of systems the younger (and hotter) component is the less massive one, as expected. However, for some systems the mass ratio is inverted.

Original language	English
Title of host publication	In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372
Publisher	Astronomical Society of the Pacific
Pages	387-392
ISBN (Print)	978-1-58381-239-6, 978-1-58381-306-5
Publication status	Published - 2007

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Napiwotzki, R., Karl, C., Nelemans, G., Yungelson, L., Christlieb, N., Drechsel, H., Heber, U., Homeier, D., Koester, D., Leibundgut, B., Marsh, T. R., Moehler, S., Renzini, A., & Reimers, D. (2007). Binary White Dwarfs in the Supernova Ia Progenitor Survey. In In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372 (pp. 387-392). Astronomical Society of the Pacific.

@inproceedings{b998054cc62049f78b68236a04a36477,

title = "Binary White Dwarfs in the Supernova Ia Progenitor Survey",

abstract = "We report results of a systematic radial velocity survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae: SPY (ESO Supernovae Ia Progenitor surveY). More than 1000 white dwarfs (WDs) and pre-white dwarfs were observed with the VLT. The aim of SPY is to perform a statistically significant test of the DD scenario. We give an overview of the project and follow-up results. The sample is used for two tests of the contempo- rary picture of close binary evolution leading to DDs. It is shown that the SPY observations of low mass He-core WDs (HeWDs) are inconsistent with the idea that they all reside in close binary systems. We carry out a model atmosphere analysis of WDs residing in double-lined binaries and estimate individual cooling ages. For a number of systems the younger (and hotter) component is the less massive one, as expected. However, for some systems the mass ratio is inverted.",

author = "R. Napiwotzki and C. Karl and G. Nelemans and L. Yungelson and N. Christlieb and H. Drechsel and U. Heber and D. Homeier and D. Koester and B. Leibundgut and T.R. Marsh and S. Moehler and A. Renzini and D. Reimers",

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/361.html Copyright ASP",

year = "2007",

language = "English",

isbn = "978-1-58381-239-6",

pages = "387--392",

booktitle = "In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372",

publisher = "Astronomical Society of the Pacific",

address = "United States",

}

Napiwotzki, R, Karl, C, Nelemans, G, Yungelson, L, Christlieb, N, Drechsel, H, Heber, U, Homeier, D, Koester, D, Leibundgut, B, Marsh, TR, Moehler, S, Renzini, A & Reimers, D 2007, Binary White Dwarfs in the Supernova Ia Progenitor Survey. in In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372. Astronomical Society of the Pacific, pp. 387-392.

TY - GEN

T1 - Binary White Dwarfs in the Supernova Ia Progenitor Survey

AU - Napiwotzki, R.

AU - Karl, C.

AU - Nelemans, G.

AU - Yungelson, L.

AU - Christlieb, N.

AU - Drechsel, H.

AU - Heber, U.

AU - Homeier, D.

AU - Koester, D.

AU - Leibundgut, B.

AU - Marsh, T.R.

AU - Moehler, S.

AU - Renzini, A.

AU - Reimers, D.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/361.html Copyright ASP

PY - 2007

Y1 - 2007

N2 - We report results of a systematic radial velocity survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae: SPY (ESO Supernovae Ia Progenitor surveY). More than 1000 white dwarfs (WDs) and pre-white dwarfs were observed with the VLT. The aim of SPY is to perform a statistically significant test of the DD scenario. We give an overview of the project and follow-up results. The sample is used for two tests of the contempo- rary picture of close binary evolution leading to DDs. It is shown that the SPY observations of low mass He-core WDs (HeWDs) are inconsistent with the idea that they all reside in close binary systems. We carry out a model atmosphere analysis of WDs residing in double-lined binaries and estimate individual cooling ages. For a number of systems the younger (and hotter) component is the less massive one, as expected. However, for some systems the mass ratio is inverted.

AB - We report results of a systematic radial velocity survey for double degenerate (DD) binaries as potential progenitors of type Ia supernovae: SPY (ESO Supernovae Ia Progenitor surveY). More than 1000 white dwarfs (WDs) and pre-white dwarfs were observed with the VLT. The aim of SPY is to perform a statistically significant test of the DD scenario. We give an overview of the project and follow-up results. The sample is used for two tests of the contempo- rary picture of close binary evolution leading to DDs. It is shown that the SPY observations of low mass He-core WDs (HeWDs) are inconsistent with the idea that they all reside in close binary systems. We carry out a model atmosphere analysis of WDs residing in double-lined binaries and estimate individual cooling ages. For a number of systems the younger (and hotter) component is the less massive one, as expected. However, for some systems the mass ratio is inverted.

M3 - Conference contribution

SN - 978-1-58381-239-6

SN - 978-1-58381-306-5

SP - 387

EP - 392

BT - In: Procs of the 15th European Workshop on White Dwarfs - ASP Conf Series 372

PB - Astronomical Society of the Pacific

ER -

Binary White Dwarfs in the Supernova Ia Progenitor Survey

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