[vsnet-outburst 15695] SSS J122221.7-311523 paper

[Taichi Kato]

   Here is our new paper.

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arXiv:1307.5936
From: Taichi Kato <tkato at kusastro.kyoto-u.ac.jp>
Date: Tue, 23 Jul 2013 03:31:44 GMT   (145kb)

Title: SSS J122221.7-311523: Double Superoutburst in a Best Candidate Period
  Bouncer
Authors: Taichi Kato (Kyoto U.), Berto Monard (Center for Backyard Astronomy
  Kleinkaroo), Franz-Josef Hambsch (Vereniging Voor Sterrenkunde), Seiichiro
  Kiyota (VSOLJ), Hiroyuki Maehara (U. of Tokyo)
Categories: astro-ph.SR
Comments: 6 pages, 4 figures, accepted for publication in PASJ (Letters)
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
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  We observed the 2012-2013 superoutburst of the newly identified transient SSS
J122221.7-311523 and found that this object showed successive two
superoutbursts. Superhumps grew in amplitude during the second superoutburst
and showed a characteristic pattern of period change reflecting the growth of
the superhump. Assuming that the periods of superhumps during the growing stage
[0.07721(1) d] and post-superoutburst stage [0.07673(3) d], represent the
dynamical precession rates at the radius of the 3:1 resonance and the radius
immediately after the superoutburst, respectively, we found that this object
has a very small mass ratio q=M2/M1 < 0.05. The possible orbital period from
quiescent data suggests q=0.045, one of the smallest among hydrogen-rich
cataclysmic variables. The long orbital period and low q make this object a
perfect candidate for a period bouncer. We suggest that the peculiar pattern of
double superoutburst is a result of a low q and may be characteristic to period
bouncers.
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Contains:
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 fig1.eps: 111075 bytes
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 fig3.eps: 147391 bytes
 fig4.eps: 177144 bytes
 j1222aph.tex: 33271 bytes
 pasj00.cls: 165941 bytes