[vsnet-chat 333] number of normal outbursts

[Taichi Kato <tkato>]

Re: [vsnet 1027] V803 Cen (J. Patterson)
Joe Patterson wrote:

>      Theories of dwarf-nova eruptions make predictions for the trend of
> normal eruption amplitudes and frequencies during the interval between
> supermaxima.  The trouble is that no star has really offered a good
> test for these predictions.  Ideally you want a large number of normal
> outbursts in this interval, but most stars give only a few.  The most
> generous seem to be YZ Cnc, SU UMa, and V1159 Ori, which offer about
> 10.  It's possible that some future extensive study (warmly
> recommended!) of these stars will be able to sharply confront the
> predictions; but it won't be easy - 10 is rather borderline to overcome
> the usual chatter of noise for which CVs are notorious.

   We can now identify at least 30 normal outbursts in SU UMa itself since
its last superoutburst in 1995 December - 1996 January.

   YYYY MM DD   mag  observers
  -------------------------------------------------
   1996 01 14  13.1  BRO,Wes
        01 26  12.7  JEN,POY
        01 30  13.4  PIE,POY
        02 08  12.7  POY,JEN,PIE,Wnt,MKJ
        02 21  13.7  BRO
        03 08  13.6  BRO
        03 14  12.0  BRO,Nmt,DIE,POY
        04 01  12.3  JEN,BRO
        04 10  13.2  Ths,POY
        04 20  12.0  POY,BRO,JEN
        05 04  13.3  POY
        05 21  12.0  JEN,POY
        06 13  12.5  POY
        07 11  12.5  SQN,BRO
        08 05  12.5  Wes
        08 24  12.2  Scp,FRF
        09 10  12.9  GRL,POY
        09 28  12.0  GRL
        10 17  12.1  BMU,PIE,JEN,POY
        11 08  12.3  PIE,POY,GRL,JEN,Wes,HSG,MOE
        11 20  13.1  POY
        12 07  13.6  Wnt,PIE,HSG
        12 28  12.4  PIE,GRL,POY
   1997 01 15  12.6  PIE,CMG,HSG
        02 08  12.0  Scp,MOE,HSG,Wnt,POY
        02 22  12.5  HSG,MRV,Wnt
        03 05  12.2  POY,HSG,MOE,Wnt,PIE,KNN
        03 10  12.6? MOE
        03 26  11.6  HSG,POY,Ths,MKJ,BRO,MOE,Wnt
        04 12  11.7  MKJ,POY,Wnt,CMG,KNN,HSG
        05 04  11.9  Wnt,KNN,MKJ,HSG,POY
        05 14  12.7  POY,HSG

   In usual sence, the superoutburst is largely overdue in this system.
The supercyles in YZ Cnc and V1159 Ori are much more regular.

Regards,
Taichi Kato

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp