ASTRO - Outburst of SY CNC - December 2007

Outburst of SY CNC - December 2007

Dwarf Novae are close binary systems with an accretion disc around the
white dwarf component. Outbursts from 2 to 9 magnitudes, lasting for a
day or two, occur at quasi-periodic intervals of days to years. Many
of these stars are ultraviolet and X-ray variable. Most UG's are
reclassified into the subspecies UGSS, UGSU and UGZ after further
study.

SY CNC is in the UGZ subspecies . UGZ type stars show cyclic
outbursts, but differ from UGSS variables by the fact that sometimes
after an outburst they do not return to minimum, but stall at a point
between maximum and minimum, remaining there for days weeks or months
at a time. These 'standstills' are the predominant characteristic of
UGZ systems.

http://www.martin-nicholson.info/sycnc/sycnc.htm

Martin Nicholson, Daventry, England.
http://www.martin-nicholson.info/1/1a.htm

Visit the Astronomical Hall of Shame at http://www.geocities.com/queen5658/

ukastronomy wrote:

Outburst of SY CNC - December 2007

Martin, I really enjoy your daily show. The animation of the dwarf nova is
nice. Thanks for continued posting; we have at least one on-topic post to
this ng daily.

--
gautam

On 30 Dec, 19:55, Gautam Majumdar wrote:
ukastronomy wrote:
Outburst of SY CNC - December 2007

Martin, I really enjoy your daily show. The animation of the dwarf nova is
nice. Thanks for continued posting; we have at least one on-topic post to
this ng daily.

--
gautam

Thank you.