The helium abundance in the ejecta of U Scorpii

M. P. Maxwell; M. T. Rushton; M. J. Darnley; H. L. Worters; M. F. Bode; A. Evans; S. P.S. Eyres; M. B.N. Kouwenhoven; F. M. Walter; B. J.M. Hassall

doi:10.1017/S1743921312014974

The helium abundance in the ejecta of U Scorpii

M. P. Maxwell^*, M. T. Rushton, M. J. Darnley, H. L. Worters, M. F. Bode, A. Evans, S. P.S. Eyres, M. B.N. Kouwenhoven, F. M. Walter, B. J.M. Hassall

^*Corresponding author for this work

Research output: Chapter in Book or Report/Conference proceeding › Conference Proceeding › peer-review

Abstract

U Scorpii was observed in outburst for the tenth time in January 2010. We obtained optical and near-infrared spectroscopy from which we derive a helium abundance of N(He)/N(H) = 0.056±0.020 from the most reliable lines available; this is lower than most other estimates and indicates that the secondary is not helium-rich, as previous studies have suggested. Velocities are found to be up to 14,000 km s^-1 in broad components and up to 1,800 km s^-1 in narrow line components. The reddening of U Sco is found to be E(B-V) = 0.14 ± 0.12.

Original language	English
Title of host publication	Binary Paths to Type Ia Supernovae Explosions
Publisher	Cambridge University Press
Pages	190-192
Number of pages	3
Edition	S281
ISBN (Print)	9781107019812
DOIs	https://doi.org/10.1017/S1743921312014974
Publication status	Published - Jul 2011
Externally published	Yes

Publication series

Name	Proceedings of the International Astronomical Union
Number	S281
Volume	7
ISSN (Print)	1743-9213
ISSN (Electronic)	1743-9221

Keywords

Abundances
Cataclysmic variables
Individual (U Scorpii)
Stars: novae

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1017/S1743921312014974

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Maxwell, M. P., Rushton, M. T., Darnley, M. J., Worters, H. L., Bode, M. F., Evans, A., Eyres, S. P. S., Kouwenhoven, M. B. N., Walter, F. M., & Hassall, B. J. M. (2011). The helium abundance in the ejecta of U Scorpii. In Binary Paths to Type Ia Supernovae Explosions (S281 ed., pp. 190-192). (Proceedings of the International Astronomical Union; Vol. 7, No. S281). Cambridge University Press. https://doi.org/10.1017/S1743921312014974

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title = "The helium abundance in the ejecta of U Scorpii",

abstract = "U Scorpii was observed in outburst for the tenth time in January 2010. We obtained optical and near-infrared spectroscopy from which we derive a helium abundance of N(He)/N(H) = 0.056±0.020 from the most reliable lines available; this is lower than most other estimates and indicates that the secondary is not helium-rich, as previous studies have suggested. Velocities are found to be up to 14,000 km s-1 in broad components and up to 1,800 km s-1 in narrow line components. The reddening of U Sco is found to be E(B-V) = 0.14 ± 0.12.",

keywords = "Abundances, Cataclysmic variables, Individual (U Scorpii), Stars: novae",

author = "Maxwell, {M. P.} and Rushton, {M. T.} and Darnley, {M. J.} and Worters, {H. L.} and Bode, {M. F.} and A. Evans and Eyres, {S. P.S.} and Kouwenhoven, {M. B.N.} and Walter, {F. M.} and Hassall, {B. J.M.}",

year = "2011",

month = jul,

doi = "10.1017/S1743921312014974",

language = "English",

isbn = "9781107019812",

series = "Proceedings of the International Astronomical Union",

publisher = "Cambridge University Press",

number = "S281",

pages = "190--192",

booktitle = "Binary Paths to Type Ia Supernovae Explosions",

edition = "S281",

}

Maxwell, MP, Rushton, MT, Darnley, MJ, Worters, HL, Bode, MF, Evans, A, Eyres, SPS, Kouwenhoven, MBN, Walter, FM & Hassall, BJM 2011, The helium abundance in the ejecta of U Scorpii. in Binary Paths to Type Ia Supernovae Explosions. S281 edn, Proceedings of the International Astronomical Union, no. S281, vol. 7, Cambridge University Press, pp. 190-192. https://doi.org/10.1017/S1743921312014974

The helium abundance in the ejecta of U Scorpii. / Maxwell, M. P.; Rushton, M. T.; Darnley, M. J. et al.
Binary Paths to Type Ia Supernovae Explosions. S281. ed. Cambridge University Press, 2011. p. 190-192 (Proceedings of the International Astronomical Union; Vol. 7, No. S281).

Research output: Chapter in Book or Report/Conference proceeding › Conference Proceeding › peer-review

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T1 - The helium abundance in the ejecta of U Scorpii

AU - Maxwell, M. P.

AU - Rushton, M. T.

AU - Darnley, M. J.

AU - Worters, H. L.

AU - Bode, M. F.

AU - Evans, A.

AU - Eyres, S. P.S.

AU - Kouwenhoven, M. B.N.

AU - Walter, F. M.

AU - Hassall, B. J.M.

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N2 - U Scorpii was observed in outburst for the tenth time in January 2010. We obtained optical and near-infrared spectroscopy from which we derive a helium abundance of N(He)/N(H) = 0.056±0.020 from the most reliable lines available; this is lower than most other estimates and indicates that the secondary is not helium-rich, as previous studies have suggested. Velocities are found to be up to 14,000 km s-1 in broad components and up to 1,800 km s-1 in narrow line components. The reddening of U Sco is found to be E(B-V) = 0.14 ± 0.12.

AB - U Scorpii was observed in outburst for the tenth time in January 2010. We obtained optical and near-infrared spectroscopy from which we derive a helium abundance of N(He)/N(H) = 0.056±0.020 from the most reliable lines available; this is lower than most other estimates and indicates that the secondary is not helium-rich, as previous studies have suggested. Velocities are found to be up to 14,000 km s-1 in broad components and up to 1,800 km s-1 in narrow line components. The reddening of U Sco is found to be E(B-V) = 0.14 ± 0.12.

KW - Abundances

KW - Cataclysmic variables

KW - Individual (U Scorpii)

KW - Stars: novae

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SN - 9781107019812

T3 - Proceedings of the International Astronomical Union

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BT - Binary Paths to Type Ia Supernovae Explosions

PB - Cambridge University Press

ER -

The helium abundance in the ejecta of U Scorpii

Abstract

Publication series

Keywords

UN SDGs

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