2009MNRAS.400.1006J


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.06CEST01:17:41

2009MNRAS.400.1006J - Mon. Not. R. Astron. Soc., 400, 1006-1018 (2009/December-1)

The Konkoly Blazhko survey: is light-curve modulation a common property of RRab stars?

JURCSIK J., SODOR A., SZEIDL B., HURTA Zs., VARADI M., POSZTOBANYI K., VIDA K., HAJDU G., KOVARI Zs., NAGY I., MOLNAR L. and BELUCZ B.

Abstract (from CDS):

A systematic survey to establish the true incidence rate of Blazhko modulation among short-period, fundamental-mode, Galactic field RR Lyrae stars has been carried out. The Konkoly Blazhko Survey (KBS) was initiated in 2004. Since then, more than 750 nights of observation have been devoted to this project. A sample of 30 RRab stars was extensively observed, and light-curve modulation was detected in 14 cases. The 47 per cent occurrence rate of the modulation is much larger than any previous estimate. The significant increase of the detected incidence rate is mostly a result of the discovery of small-amplitude modulation. Half of the Blazhko variables in our sample show the modulation with such a small amplitude that they would definitely have been missed in previous surveys. We have found that the modulation can be very unstable in some cases; for example, RY Com showed regular modulation during only one part of the observations, and had a stable light curve with abrupt, small changes in the pulsation amplitude during two observing seasons. This type of light-curve variability is hard to detect in the data from other surveys. The higher frequency of the light-curve modulation of RRab stars makes it even more important to find an explanation for the Blazhko phenomenon.

The validity of the [Fe/H](P, φ31) relationship using the mean light curves of Blazhko variables is checked in our sample. We found that the formula gives accurate result for small-modulation-amplitude Blazhko stars, and this is also the case for large-modulation-amplitude stars if the light curve has complete phase coverage. However, if the data for large-modulation-amplitude Blazhko stars are not extended enough (e.g. fewer than 500 data points from fewer than 15 nights), the formula may give false result owing to the distorted shape of the mean light curve used.


Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): methods: data analysis - techniques: photometric - stars: horizontal branch - stars: oscillations - stars: variables: other

Simbad objects: 34

goto Full paper

goto View the reference in ADS

Number of rows : 34

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* BK Cas RR* 00 53 07.3428619122 +64 36 03.278503967     13.60     ~ 12 0
2 V* XY And RR* 01 26 42.4339950863 +34 04 06.880769279   12.98 13.72     ~ 24 0
3 V* ET Per RR* 01 39 22.1492061459 +53 52 18.852263080           ~ 17 0
4 V* SS For RR* 02 07 51.9785340895 -26 51 57.718876816   10.45 10.20     kF5hF8 98 0
5 V* V378 Per RR* 03 55 01.2271446066 +32 35 38.146611298     12.56 13.23   ~ 15 0
6 V* EZ Cep RR* 03 58 05.4734520186 +81 14 22.836968486           ~ 31 0
7 V* BR Tau RR* 04 34 42.9165952658 +21 46 21.653105543     12.45     ~ 21 0
8 V* BH Aur RR* 05 12 04.2692266692 +33 57 46.968562750           ~ 44 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15333 1
10 V* RZ Cam RR* 06 33 59.7848711889 +67 01 31.022194041     12.94     ~ 28 0
11 V* GI Gem RR* 07 04 40.8545894395 +13 26 12.501196547           ~ 26 0
12 V* TZ Aur RR* 07 11 35.0231898555 +40 46 37.148652580   12.44 11.55     A2 106 0
13 V* RR Gem RR* 07 21 33.5309119093 +30 52 59.465855758   12.34 11.92     A8 199 0
14 V* TW Lyn RR* 07 45 06.3012925787 +43 06 41.578305229   12.52 11.69     kA6hF6 63 0
15 V* SS Cnc RR* 08 06 25.5850846353 +23 15 05.629646237   12.40 12.11     A8.5 92 0
16 V* UZ UMa RR* 08 18 53.9125352744 +73 05 47.925776041     14.44     A5 28 0
17 V* SU Leo RR* 09 53 37.5710125934 +07 58 44.849322936   12.20 13.74     ~ 21 0
18 V* SW CVn RR* 12 40 55.0178274814 +37 05 06.846299577   13.47 13.09 13.16   A0 44 0
19 V* RY Com RR* 13 05 07.9830909539 +23 16 42.381531439   12.89 13.01     A5 65 0
20 V* UZ Vir RR* 13 08 44.3344144411 +13 24 08.386370510     13.62     ~ 19 0
21 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2310 0
22 V* UU Boo RR* 15 17 05.2604081947 +35 06 56.520825778   12.47 12.28     kA9.5hF6 70 0
23 V* MW Lyr RR* 18 19 53.8178963804 +31 58 54.622000023           ~ 42 0
24 V* AQ Lyr RR* 18 34 51.0388992472 +26 35 41.746544834           ~ 23 0
25 V* CN Lyr RR* 18 41 15.9455510880 +28 43 21.180262324   11.93 11.38     F5 81 0
26 V* BD Her RR* 18 50 32.1914976981 +16 31 50.940386484   12.53       kF4hF6 25 0
27 V* V759 Cyg RR* 20 00 26.8627321071 +48 59 37.640191080     13.50     ~ 13 0
28 V* FH Vul RR* 20 40 19.8863263981 +22 13 24.291008291           ~ 25 0
29 V* FK Vul RR* 20 52 31.0044014972 +22 26 11.727558837   12.96 12.30     ~ 23 0
30 V* DM Cyg RR* 21 21 11.5417750255 +32 11 28.706822821   11.83 11.63     F2.5 108 0
31 V* CG Peg RR* 21 41 16.7875479069 +24 46 24.469443232   11.43 11.13     F1 84 0
32 V* CZ Lac RR* 22 19 30.7340413018 +51 28 14.820148426   11.10 11.20     F1 75 0
33 V* BK And RR* 23 35 06.0326911269 +41 06 10.470713506   12.20 12.88     ~ 33 0
34 NAME Galactic Bulge reg ~ ~           ~ 3574 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2009MNRAS.400.1006J and select 'bookmark this link' or equivalent in the popup menu


2021.05.06-01:17:41

© Université de Strasbourg/CNRS

    • Contact