Dartmouth College Dartmouth Digital Commons Open Dartmouth: Published works by Dartmouth faculty Faculty Work 10-1-2001 Spectroscopy and Orbital Periods of Four Cataclysmic Variable Stars John R. Thorstensen Dartmouth College Cynthia J. Taylor Dartmouth College Follow this and additional works at: https://digitalcommons.dartmouth.edu/facoa Part of the Stars, Interstellar Medium and the Galaxy Commons Dartmouth Digital Commons Citation Thorstensen, John R. and Taylor, Cynthia J., "Spectroscopy and Orbital Periods of Four Cataclysmic Variable Stars" (2001). Open Dartmouth: Published works by Dartmouth faculty. 1868. https://digitalcommons.dartmouth.edu/facoa/1868 This Article is brought to you for free and open access by the Faculty Work at Dartmouth Digital Commons. It has been accepted for inclusion in Open Dartmouth: Published works by Dartmouth faculty by an authorized administrator of Dartmouth Digital Commons. For more information, please contact
[email protected]. Mon. Not. R. Astron. Soc. 326, 1235–1242 (2001) Spectroscopy and orbital periods of four cataclysmic variable stars John R. ThorstensenP and Cynthia J. Taylor Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, USA Accepted 2001 May 2. Received 2001 May 2; in original form 2001 March 29 ABSTRACT We present spectroscopy and orbital periods Porb of four relatively little-studied cataclysmic variable stars. The stars and their periods are: AF Cam, Porb ¼ 0:324ð1Þ d (the daily cycle count is slightly ambiguous); V2069 Cyg (¼ RX J2123.714217), 0.311683(2) d; PG 09351075, 0.1868(3) d; and KUV 0358010614, 0.1495(6) d. V2069 Cyg and KUV 0358010614 both show He II l4686 emission comparable in strength to Hb.