2003A&A...398..213M


Query : 2003A&A...398..213M

2003A&A...398..213M - Astronomy and Astrophysics, volume 398, 213-222 (2003/1-4)

Fourier decomposition and frequency analysis of the pulsating stars with P<1d in the OGLE database. II. Multiperiodic RR Lyrae variables in the Galactic Bulge.

MOSKALIK P. and PORETTI E.

Abstract (from CDS):

We present the results of a systematic search for multiperiodic pulsators among the Galactic Bulge RR Lyrae stars of the OGLE-1 sample. We identify one ``canonical'' double-mode variable (RRd star) pulsating in two radial modes. In 38 stars we detect secondary periodicities very close to the primary pulsation frequency. This type of multiperiodic variables constitute ∼23% of RRab and ∼5% of RRc population of the Bulge. With the observed period ratios of 0.95-1.02 the secondary periods must correspond to nonradial modes of oscillation. Their beating with the primary (radial) pulsation leads to a long-term amplitude and phase modulation, known as the Blazhko effect. The Blazhko RRab variables occur more frequently in the Galactic Bulge than in the LMC. The opposite tendency is seen in case of the RRd stars. The differences of incidence rates are most likely caused by different metallicity of the two populations. We discuss pulsation properties of the OGLE-1 Blazhko stars and compare them with predictions of theoretical models. We argue, that the oblique magnetic pulsator model of Shibahashi (2000, ASP Conf. Ser. 203, 299) cannot account for the observations and should be ruled out.

Abstract Copyright:

Journal keyword(s): stars: horizontal branch - stars: oscillations - stars: variables: RR Lyr

Simbad objects: 52

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Number of rows : 52
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17260 1
2 V* AQ Leo RR* 11 23 55.2752313792 +10 18 59.076153504           kA5hF3.5 82 0
3 OGLE MM5-A V24 RR* 17 46 46.0935911592 -34 43 49.107010368     17.250   15.858 ~ 8 0
4 OGLE MM5-A V20 RR* 17 46 49.2545625000 -34 52 01.803165240     16.862   15.674 ~ 10 0
5 OGLE MM5-A V46 RR* 17 46 51.3060498576 -34 50 20.792247180     17.815   16.487 ~ 14 0
6 OGLE MM5-A V9 RR* 17 47 21.2005769352 -34 40 21.005394276     17.014   15.67 ~ 15 0
7 OGLE MM5-B V4 RR* 17 47 22.4406934049 -34 56 41.975513033     16.384   15.227 ~ 14 0
8 OGLE BW9 V34 RR* 18 00 27.327 -29 54 52.55     16.93   16.04 ~ 5 0
9 OGLE BW11 V34 RR* 18 00 29.7478762512 -30 17 33.676429056     17.144   15.806 ~ 11 0
10 OGLE BW10 V41 RR* 18 00 36.6284934396 -30 00 01.500477253     17.537 16.89 15.944 ~ 15 0
11 OGLE BW11 V55 RR* 18 00 37.2219067728 -30 22 02.460776412     17.625   16.18 ~ 13 0
12 OGLE BW9 V38 RR* 18 00 44.2295900232 -29 52 53.232443040     17.088   15.887 ~ 13 0
13 OGLE BW11 V10 RR* 18 00 44.7175288488 -30 21 35.636460084     17.005   15.608 ~ 13 0
14 OGLE BW9 V24 RR* 18 00 46.6728849624 -29 46 52.899238128     17.044   15.882 ~ 13 0
15 OGLE BLG-RRLYR-10700 RR* 18 00 49.5722230392 -30 08 04.798028040     16.881 16.23 15.476 ~ 17 0
16 OGLE BW10 V44 RR* 18 00 56.9035534008 -30 00 39.268247004     17.404 16.76 15.954 ~ 18 0
17 OGLE BW10 V40 RR* 18 01 03.3399938232 -29 56 49.431860916     17.016 16.57 15.776 ~ 16 0
18 OGLE BW11 V44 RR* 18 01 06.2240196048 -30 15 37.385303940     17.462   16.181 ~ 14 0
19 OGLE BW10 V66 RR* 18 01 07.8692200368 -30 01 03.787322916     17.671 17.17 16.258 ~ 15 0
20 OGLE BW10 V20 RR* 18 01 13.8841991376 -29 56 56.219288748     17.020 16.69 15.737 ~ 19 0
21 V* V4097 Sgr RR* 18 02 06.0782892720 -29 44 58.491490704   17.4 17.077 16.55 15.896 ~ 20 0
22 OGLE BW2 V10 RR* 18 02 06.0896510142 -30 21 59.058966823     16.539   15.45 ~ 11 0
23 V* V1330 Sgr RR* 18 02 08.5950144984 -30 12 05.785861176     17.388   15.876 ~ 21 0
24 OGLE BW5 V34 RR* 18 02 15.8949217968 -30 05 09.780861768     17.441   16.087 ~ 15 0
25 V* V1352 Sgr RR* 18 02 32.4453298920 -29 58 56.850174624     16.912 16.34 15.651 ~ 25 0
26 V* V1369 Sgr RR* 18 02 38.9741812056 -29 51 56.698886880     16.855   15.716 ~ 19 0
27 V* V1367 Sgr RR* 18 02 39.1885863312 -30 07 07.879532268     17.262 16.62 15.853 ~ 24 0
28 V* V1384 Sgr RR* 18 02 49.0941803376 -30 00 53.550801648     16.745   15.706 ~ 17 0
29 V* V1382 Sgr RR* 18 02 49.2478518912 -30 12 55.289447460     17.459   16.157 ~ 19 0
30 V* V1386 Sgr RR* 18 02 51.9080134416 -30 08 03.721188264     17.271 16.73 15.960 ~ 21 0
31 V* V1392 Sgr RR* 18 02 57.3625956168 -30 00 06.801248124     17.036   15.830 ~ 20 0
32 V* V1405 Sgr RR* 18 03 03.7324192488 -30 04 00.868939633     18.207   16.987 ~ 18 0
33 OGLE BW6 V7 RR* 18 03 05.1781377216 -30 20 30.765984576     16.678   15.553 ~ 17 0
34 V* V1408 Sgr RR* 18 03 07.7711124144 -29 50 05.973875340     16.459   15.454 ~ 24 0
35 V* V4111 Sgr RR* 18 03 07.9496048946 -29 44 06.661004878   17.0 16.731   15.737 ~ 16 0
36 OGLE BW6 V20 RR* 18 03 08.1728483184 -30 17 48.600165300     17.030 16.70 15.974 ~ 17 0
37 V* V1409 Sgr RR* 18 03 09.5483017992 -30 11 57.453958608     16.922 16.33 15.634 ~ 22 0
38 V* V1415 Sgr RR* 18 03 15.8371982784 -30 08 56.898739176     17.274   15.972 ~ 18 0
39 OGLE BLG-RRLYR-11978 RR* 18 03 17.0955110016 -29 57 23.911409124     17.036   15.810 ~ 15 0
40 V* V1427 Sgr RR* 18 03 24.1675052664 -30 05 13.362684144     16.793 16.44 15.694 ~ 21 0
41 V* V4113 Sgr RR* 18 03 29.8806707208 -30 01 56.637184800   17.1 16.680   15.762 ~ 18 0
42 OGLE BW6 V29 RR* 18 03 39.8619495000 -30 22 03.516480300     17.319   15.946 ~ 16 0
43 OGLE BW6 V18 RR* 18 03 43.3479759816 -30 18 44.622425088     17.238   15.906 ~ 17 0
44 OGLE BW3 V17 RR* 18 03 54.7876615320 -30 20 37.864167828     17.179   16.017 ~ 16 0
45 V* V1465 Sgr RR* 18 03 55.9604133860 -30 12 46.302138880     16.877 16.39 15.756 ~ 24 0
46 V* V1496 Sgr RR* 18 04 19.6007822280 -29 58 26.774738724     16.397 15.91 15.285 ~ 24 0
47 V* V1498 Sgr RR* 18 04 22.4595911328 -29 54 41.372428140     16.727   15.44 ~ 20 0
48 V* V1516 Sgr RR* 18 04 29.5064770896 -30 01 07.791660408     16.955 16.26 15.657 ~ 21 0
49 V* V1523 Sgr RR* 18 04 31.7559769272 -30 02 40.694459136     16.854   15.783 ~ 18 0
50 V* V1550 Sgr RR* 18 04 50.3586992376 -30 06 30.435290352     17.585   16.252 ~ 14 0
51 V* V1551 Sgr RR* 18 04 50.3735636280 -30 07 49.586644524     17.778 17.16 16.23 ~ 20 0
52 NAME Galactic Bulge reg ~ ~           ~ 4252 0

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