Hubble Space Telescope Ultraviolet Light Curves Reveal Interesting Properties of CC Sculptoris and RZ Leonis

Journal Article · Wed Mar 01 00:00:00 EST 2017 · Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/AA5C88· OSTI ID:22663759

Szkody, Paula; Mukadam, Anjum S. ^[1]; Toloza, Odette; Gänsicke, Boris T.; Pala, Anna F. ^[2]; Dai, Zhibin ^[3]; Waagen, Elizabeth O. ^[4]; Godon, Patrick

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1. Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195 (United States)
2. Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)
3. Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216 (China)
4. AAVSO, 48 Bay State Rd, Cambridge, MA 02138 (United States)

Time-tag ultraviolet data obtained on the Hubble Space Telescope in 2013 reveal interesting variability related to the white dwarf spin in the two cataclysmic variables RZ Leo and CC Scl. RZ Leo shows a period at 220 s and its harmonic at 110 s, thus identifying it as a likely Intermediate Polar (IP). The spin signal is not visible in a short single night of ground-based data in 2016, but the shorter exposures in that data set indicate a possible partial eclipse. The much larger UV amplitude of the spin signal in the known IP CC Scl allows the spin of 389 s, previously only seen at outburst, to be visible at quiescence. Spectra created from the peaks and troughs of the spin times indicate a hotter temperature of several thousand degrees during the peak phases, with multiple components contributing to the UV light.

• OSTI ID: 22663759
• Journal Information: Astronomical Journal (Online), Vol. 153, Issue 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DIAGRAMS
ECLIPSE
HARMONICS
NOVAE
SPACE
SPIN
TELESCOPES
ULTRAVIOLET RADIATION
VISIBLE RADIATION
WHITE DWARF STARS