2006A&A...452..933O


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST06:58:44

2006A&A...452..933O - Astronomy and Astrophysics, volume 452, 933-939 (2006/6-4)

The CUrious Variables Experiment (CURVE). Variable properties of the dwarf nova SS Ursae Minoris.

OLECH A., MULARCZYK K., KEDZIERSKI P., ZLOCZEWSKI K., WISNIEWSKI M. and SZARUGA K.

Abstract (from CDS):

We report on extensive photometry of the dwarf nova SS Ursae Minoris throughout nine months of 2004. In total, we recorded two superoutbursts and 11 normal outbursts of the star. SS UMi has been known to show frequent superoutbursts with a mean interval of 84.7-days. Our data suggest that the interval between successive superoutbursts lengthened to 197-days, indicating that SS UMi entered a period of untypical behavior manifested by a growth in the quiescent magnitude of the star and a series of frequent, low-amplitude, normal outbursts observed from July to September 2004. The mean superhump period derived for the April 2004 superoutburst of SS UMi is Psh=0.070149(16)-days (101.015±0.023min). Combining this value with an earlier orbital period determination, we were able to derive the period excess, which is equal to 3.5±1.6%, and estimate the mass ratio of the binary system as equal to q=0.16±0.07. During the entire superoutburst, the period decreased at a rate of {dot}(P/P)sh=-6.3(1.4)x10–5. However, detailed analysis of the timings of superhump maxima seem to suggest a more complex period change, with a decrease in the period during the first and last stages of the superoutburst but an increase in the middle interval.

Abstract Copyright:

Journal keyword(s): stars: binaries: close - stars: variables: general - stars: dwarf novae

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* WX Cet DN* 01 17 04.17 -17 56 23.0           ~ 163 0
2 V* V1159 Ori Or* 05 28 59.5675682576 -03 33 52.283089971   12.5       ~ 132 0
3 V* YZ Cnc DN* 08 10 56.6513272947 +28 08 33.259393864     15.24     ~ 240 0
4 V* SW UMa CV* 08 36 42.7494852536 +53 28 37.976353343           ~ 292 0
5 V* DI UMa DN* 09 12 16.1938983103 +50 53 53.959796825           ~ 80 0
6 V* ER UMa DN* 09 47 11.9407998149 +51 54 08.950836060 14.351 14.03 13.91 14.909 14.629 ~ 137 0
7 V* RZ LMi CV* 09 51 48.9263455186 +34 07 23.968904524           ~ 104 0
8 V* KS UMa CV* 10 20 26.5187197673 +53 04 33.088109985   17.0       ~ 61 0
9 V* SX LMi DN* 10 54 30.4184953396 +30 06 10.358997006   16.9   15.6   ~ 65 0
10 V* CY UMa DN* 10 56 56.9968984256 +49 41 18.198527698   17.0       ~ 94 1
11 V* V485 Cen DN* 12 57 23.1807451670 -33 12 05.745406224   15.8   15.9   ~ 98 0
12 V* HV Vir DN* 13 21 03.1665682309 +01 53 29.071215583           DA 146 0
13 V* TT Boo DN* 14 57 44.7550274249 +40 43 40.691526116           ~ 67 0
14 V* SS UMi DN* 15 51 22.3401100743 +71 45 11.834268824           ~ 68 0
15 [HH95] SS UMi-6 * 15 51 59.3755504295 +71 44 25.503754001   13.417 12.506     ~ 2 0
16 [HH95] SS UMi-7 * 15 52 07.2219817526 +71 46 34.631979563   14.242 13.187     ~ 2 0
17 V* IX Dra DN* 18 12 31.4708407404 +67 04 45.823783565           sdB 42 0
18 V* V1028 Cyg DN* 20 00 56.59 +56 56 37.2           ~ 51 0
19 V* RZ Sge DN* 20 03 18.47616 +17 02 51.9432   17.6   17.2   ~ 87 0
20 V* EI Psc DN* 23 29 54.2149131154 +06 28 11.597690024   16.86 16.22     ~ 109 0

    Equat.    Gal    SGal    Ecl

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2020.10.24-06:58:44

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