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Full-Text Articles in Physical Sciences and Mathematics
The Cataclysmic Variable Sdss J1507+52: An Eclipsing Period Bouncer In The Galactic Halo, Helena Uthas, Christian Knigge, Knox S. Long, Joseph Patterson, John Thorstensen
The Cataclysmic Variable Sdss J1507+52: An Eclipsing Period Bouncer In The Galactic Halo, Helena Uthas, Christian Knigge, Knox S. Long, Joseph Patterson, John Thorstensen
Dartmouth Scholarship
SDSS J1507+52 is an eclipsing cataclysmic variable (CV) consisting of a cool, non-radially pulsating white dwarf and an unusually small substellar secondary. The system has a high space velocity and a very short orbital period of about 67 min, well below the usual minimum period for CVs. To explain the existence of this peculiar system, two theories have been proposed. One suggests that SDSS J1507+52 was formed from a detached white dwarf-brown dwarf binary. The other theory proposes that the system is a member of the Galactic halo population.
Here, we present the ultraviolet (UV) spectroscopy of SDSS J1507+52 obtained …
Sdss J162520.29+120308.7 – A New Su Ursae Majoris Star In The Period Gap, A. Olech, E. De Miguel, M. Otulakowska, J. R. Thorstensen
Sdss J162520.29+120308.7 – A New Su Ursae Majoris Star In The Period Gap, A. Olech, E. De Miguel, M. Otulakowska, J. R. Thorstensen
Dartmouth Scholarship
We report results of an extensive world-wide observing campaign devoted to the recently discovered dwarf nova SDSS J162520.29+120308.7 (SDSS J1625). The data were obtained during the July 2010 eruption of the star and in August and September 2010 when the object was in quiescence.