Revista Mexicana de Astronomía y Astrofísica

ISSN: 3061-8649
Vol. 62 No. 02 (2026), Research articles
Vol. 62 No. 02 (2026)
Research articles

New Spectroscopy of the Intermediate Polar Dw Cnc

DOI: https://doi.org/10.22201/ia.30618649e.2026.62.02.7580
A. Ruelas-Mayorga
Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 70-264, CDMX 04510, México.
https://orcid.org/0000-0002-7800-1308
J. Echevarría
Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 70-264, CDMX 04510, México.
https://orcid.org/0000-0001-5960-3023
I. Mora Zamora
Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 70-264, CDMX 04510, México.
https://orcid.org/0009-0001-2770-2139
M. Torres Paniagua
L. J. Sánchez
Universidad Nacional Autónoma de México, Instituto de Astronomía, AP 70-264, CDMX 04510, México.
https://orcid.org/0000-0001-9637-7774
S. H. Ramírez
Department of Physics, University ofWarwick, Coventry, CV4 7AL, UK.
https://orcid.org/0000-0001-5807-0800
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New Spectroscopy of the Intermediate Polar Dw Cnc. (2026). Revista Mexicana De Astronomía Y Astrofísica, 62(02), 174-182. https://doi.org/10.22201/ia.30618649e.2026.62.02.7580
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Abstract

 We present new spectroscopy of the intermediate polar DW Cnc. We focus our analysis on several emission lines of H and He I. In particular, we obtain the value of the semi-amplitude K1 from the radial velocities of such lines, which varies between 17 and 32  km s-1. We present also a thorough Doppler Tomography study of these lines. The system was observed in a high-state whereas in previous works it was detected either in a low--state or in a partial recuperation to a high--state. The new Doppler Tomography confirms that mass transfer through the L1 point has been re-established.

Crawford, T., Boyd, D., Gualdoni, C., et al. 2008, JAVSO, 36, 60
Duffy, C., Ramsay, G., Steeghs, D., et al. 2022, MNRAS, 510, 1002, doi: 10.1093/mnras/stab3402
Hellier, C. 2001, Cataclysmic Variable Stars-How And Why They Vary (Springer-Praxis)
Hernandez Santisteban, J. V. 2021, PyDoppler: Wrapper for Doppler tomography software, Astrophysics Source Code Library, record ascl:2106.003
Hoard, D. W., Wachter, S., Clark, L. L., & Bowers, T. P. 2002, ApJ, 565, 511, doi: 10.1086/324499
Kholopov, P. N., Samus’, N. N., Kukarkina, N. P., Medvedeva, G. I., & Perova, N. B. 1981, IBVS, 2042, 1
Kopylov, I. M., Lipovetsky, V. A., Somov, N. N., Somova, T. A., & Stepanian, J. A. 1988, Afz, 28, 287
Mora Zamora, I., Echevarr.a, J., Sánchez, L. J., & Ramírez, S. H. 2025, MNRAS, 539, 2055, doi: 10.1093/mnras/staf612
Patterson, J., Thorstensen, J. R., Vanmunster, T., et al. 2004, PASP, 116, 516, doi: 10.1086/421034
Ramírez, S. H., Segura Montero, O., Michel, R., & Echevarría, J. 2022, RMxAA, 58, 47, doi: 10.22201/ia.01851101p.2022.58.01.04
Rodríguez-Gil, P., G.nsicke, B. T., Araujo-Betancor, S., & Casares, J. 2004, MNRAS, 349, 367, doi: 10.1111/j.1365-2966.2004.07512.x
Segura Montero,O., Ramírez, S. H., & Echevarría, J. 2020, MNRAS, 494, 4110, doi: 10.1093/mnras/staa856
Shafter, A.W., Szkody, P., & Thorstensen, J. R. 1986, ApJ, 308, 765, doi: 10.1086/164549
Spruit, H. C. 1998, arXiv e-prints, astro. https://arxiv.org/abs/astro-ph/9806141
Stepanyan, D. A. 1982, PZ, 21, 691
Uemura, M., Kato, T., Ishioka, R., Novak, R., & Pietz, J. 2002, PASP, 54, 299, doi: 10.1093/pasj/54.2.299
Veresvarska, M., Scaringi, S., Littlefield, C., et al. 2025, MNRAS, 539, 2424, doi: 10.1093/mnras/staf412
Warner, B. 1995, Cataclysmic variable stars, Vol. 28 (Cambridge University Press)
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