[vsnet-chat 834] Can CE UMa be a supernova?

[Taichi Kato <tkato>]

Can CE UMa be a supernova?

  Radial velocities of galaxies around CE UMa from the CfA survey:

111435.4 +293238 (2000.0) CfA_11119+2949 v=14054km/s Bmag=16.0
111510.0 +293148 (2000.0) CfA_11124+2948 v=14885km/s Bmag=15.5
111518.2 +293139 (2000.0) CfA_A1112+2948 v=14064km/s Bmag=15.8
111525.2 +292752 (2000.0) CfA_A1112+2944 v=14099km/s Bmag=15.43
111530.1 +292138 (2000.0) CfA_A1112+2938 v=14017km/s Bmag=15.84
111534.2 +293143 (2000.0) CfA_1112+2948 v=14195km/s
111543.1 +292641 (2000.0) CfA_A1113+2943 v=8491km/s Bmag=15.54
111545.8 +292229 (2000.0) CfA_1113+2938 v=14218km/s Bmag=15.81
111551.0 +290441 (2000.0) CfA_1113+2921 v=14325km/s
111609.9 +290503 (2000.0) CfA_1113+2921 v=12614km/s
111610.7 +292632 (2000.0) CfA_11134+2943 v=8322km/s Bmag=15.4
111613.4 +292307 (2000.0) CfA_11135+2940 v=8837km/s Bmag=15.3
111617.4 +291335 (2000.0) CfA_11135+2930 v=13170km/s Bmag=15.5
111621.7 +292625 (2000.0) CfA_1113+2942 v=8756km/s
111622.6 +291508 (2000.0) CfA_11136+2931 v=13581km/s Bmag=15.2
111624.9 +291049 (2000.0) CfA_11137+2927S v=14655km/s Bmag=16.5
111624.9 +291111 (2000.0) CfA_11137+2927N v=13206km/s Bmag=15.3
111627.9 +291936 (2000.0) CfA_11137+2936 v=13860km/s Bmag=15.2
111628.4 +291709 (2000.0) CfA_A1113+2933 v=14201km/s Bmag=14.89
111630.7 +291343 (2000.0) CfA_A1113+2930 v=14512km/s Bmag=15.56
111632.3 +291633 (2000.0) CfA_A1113+2932 v=13879km/s Bmag=14.87
111633.2 +291844 (2000.0) CfA_A1113+2935 v=13889km/s Bmag=15.11
111634.6 +291516 (2000.0) CfA_11139+2931N v=14599km/s Bmag=15.5
111634.9 +291458 (2000.0) CfA_11139+2931S v=15057km/s Bmag=15.9
111635.9 +291436 (2000.0) CfA_A1113+2931 v=12989km/s
111641.9 +291923 (2000.0) CfA_A1114+2935 v=15211km/s Bmag=16.04
111656.9 +291601 (2000.0) CfA_A1114+2932 v=14253km/s Bmag=16.32
111700.3 +290825 (2000.0) CfA_A1114+2924 v=13986km/s
111716.0 +292018 (2000.0) CfA_1114+2936 v=7111km/s Bmag=16.0
111733.0 +292200 (2000.0) CfA_A1114+2938 v=14062km/s
111737.0 +292945 (2000.0) CfA_A1114+2946 v=13592km/s
111752.5 +291815 (2000.0) CfA_11152+2935 v=7023km/s Bmag=15.6

  The galaxy closest to CE UMa:

111613.4 +292307 (2000.0) CfA_11135+2940 v=8837km/s Bmag=15.3

  Taking this value, the expected maxima may be

SN Ia: 17.0
SN II: 19.0

  Taking a RV of typical cluster members (~14000 km/s) the maximum
becomes

SN Ia: 18.0
SN II: 20.0

  The both magnitudes are well below the observed maximum of CE UMa
(15.5).  So I presume this variable is a dwarf nova.

Regards,
Taichi Kato

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