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Dissecting the donor star in the eclipsing polar HU Aquarii

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Schwope, A. D., Horne, K., Steeghs, D. and Still, M.. (2011) Dissecting the donor star in the eclipsing polar HU Aquarii. Astronomy & Astrophysics, Vol.531 . Article A34. ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361/201016373

Abstract

Medium-resolution spectroscopic observations with full phase coverage of the eclipsing polar HU Aqr are presented. Na I absorption and Ca II emission lines are used to trace the secondary star. While the Na I lines seem to have contributions from both hemispheres of the donor star, the Ca II lines were found to originate from the irradiated part of its surface alone. An irradiation model was applied and the irradiation-weighted radial velocity amplitude was used to determine the mass ratio Q = M(WD)/M(2) = 4.58 +/- 0.20. When combined with high-speed photometric low-state eclipse light curves, the white dwarf mass is constrained to 0.75 < M(WD)/M(circle dot) < 0.84 with a best-fit value of M(WD) = (0.80 +/- 0.04) M(circle dot), and M(2) = (0.18 +/- 0.06) M(circle dot) at an orbital inclination of i = 87(-0.5)(o+0.8).

Item Type:

Journal Article

Subjects:

Q Science > QB Astronomy

Divisions:

Faculty of Science > Physics

Library of Congress Subject Headings (LCSH):

Eclipsing binaries, Variable stars

Journal or Publication Title:

Astronomy & Astrophysics

Publisher:

E D P Sciences

ISSN:

0004-6361

Official Date:

2011

Dates:

Date	Event
2011	Published

Volume:

Vol.531

Page Range:

Article A34

Identifier:

10.1051/0004-6361/201016373

Status:

Peer Reviewed

Publication Status:

Published

Access rights to Published version:

Restricted or Subscription Access

References:

Barman, T. S., Hauschildt, P. H., & Allard, F. 2004, ApJ, 614, 338
Beuermann, K., & Reinsch, K. 2008, A&A, 480, 199
Bridge, C. M., Cropper, M., Ramsay, G., et al. 2002, MNRAS, 336, 1129
Catalán, M. S., Schwope, A. D., & Smith, R. C. 1999, MNRAS, 310, 123
Glenn, J., Howell, S. B., Schmidt, G. D., et al. 1994, ApJ, 424, 967
Hakala, P. J., Watson, M. G., Vilhu, O., et al. 1993, MNRAS, 263, 61
Harrop-Allin, M. K., Cropper, M., Hakala, P. J., Hellier, C., & Ramseyer, T.
1999, MNRAS, 308, 807
Harrop-Allin, M. K., Potter, S. B., & Cropper, M. 2001, MNRAS, 326, 788
Heerlein, C., Horne, K., & Schwope, A. D. 1999, MNRAS, 304, 145
Howell, S. B., Ciardi, D. R., Sirk, M. M., & Schwope, A. D. 2002, AJ, 123, 420
Knigge, C. 2006, MNRAS, 373, 484
Knigge, C. 2007, MNRAS, 382, 1982
Nasiroglu, I., Slowikowska, A., Kanbach, G., Schwarz, R., & Schwope, A. 2010,
in High Time Resolution Astrophysics IV, ed. A. Shearer, Am. Inst. Phys.
Conf. Ser., Vol. PoS(HTRA-IV)048, in press
Nauenberg, M. 1972, ApJ, 175, 417
Panei, J. A., Althaus, L. G., & Benvenuto, O. G. 2000, A&A, 353, 970
Qian, S., Liu, L., Liao,W., et al. 2011, MNRAS, accepted [arXiv:1103.2005]
Schwarz, R., Schwope, A. D., Vogel, J., et al. 2009, A&A, 496, 833
Schwope, A. 2001, in Astrotomography, Indirect Imaging Methods in
Observational Astronomy, ed. H. M. J. Boffin, D. Steeghs, & J. Cuypers
(Berlin: Springer Verlag), Lect. Notes Phys., 573, 127
Schwope, A. D., & Christensen, L. 2010, A&A, 514, A89
Schwope, A. D., Thomas, H. C., & Beuermann, K. 1993, A&A, 271, L25
Schwope, A. D., Mantel, K., & Horne, K. 1997, A&A, 319, 894
Schwope, A. D., Beuermann, K., Buckley, D. A. H., et al. 1998, in Wild Stars in
the Old West, ed. S. Howell, E. Kuulkers, & C. Woodward, ASP Conf. Ser.,
137, 44
Schwope, A. D., Catalán, M. S., Beuermann, K., et al. 2000, MNRAS, 313, 533
Schwope, A. D., Schwarz, R., Sirk, M., & Howell, S. B. 2001, A&A, 375, 419
Schwope, A. D., Thomas, H., Mantel, K., Haefner, R., & Staude, A. 2003, A&A,
402, 201
Schwope, A. D., Staude, A., Vogel, J., & Schwarz, R. 2004, Astron. Nachr., 325,
197
van Spaandonk, L., Steeghs, D., Marsh, T. R., & Torres, M. A. P. 2010, MNRAS,
401, 1857
Vogel, J., Schwope, A., Schwarz, R., et al. 2008, in High Time Resolution
Astrophysics: The Universe at Sub-Second Timescales, ed. D. Phelan,
O. Ryan, & A. Shearer, AIP Conf. Ser., 984, 264
Vrielmann, S., & Schwope, A. D. 2001, MNRAS, 322, 269
Watson, C. A., Dhillon, V. S., Rutten, R. G. M., & Schwope, A. D. 2003,
MNRAS, 341, 129