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


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET23:32:59

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 - 2020
#notes
1 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14340 1
2 V* AQ Leo RR* 11 23 55.2750743728 +10 18 59.080007685           A1 69 0
3 OGLE BLG121.3 64516 RR* 17 46 46.1017007231 -34 43 49.200948421     17.250   15.858 ~ 5 0
4 OGLE MM5-A V20 RR* 17 46 49.2550308546 -34 52 01.807006433     16.862   15.674 ~ 7 0
5 OGLE MM5-A V46 RR* 17 46 51.3053234894 -34 50 20.791938941     17.815   16.487 ~ 8 0
6 OGLE MM5-A V9 RR* 17 47 21.1998914294 -34 40 21.006797208     17.014   15.67 ~ 8 0
7 OGLE BLG121.2 27383 RR* 17 47 22.4402134242 -34 56 41.973054843     16.384   15.227 ~ 8 0
8 OGLE BW9 V34 RR* 18 00 27.327 -29 54 52.55     16.93     ~ 4 0
9 OGLE BW11 V34 RR* 18 00 29.7487100590 -30 17 33.664999107     17.144   15.806 ~ 8 0
10 OGLE BW10 V41 RR* 18 00 36.62 -30 00 01.5     17.537 16.89 15.944 ~ 11 0
11 OGLE BW11 V55 RR* 18 00 37.2223643723 -30 22 02.466871016     17.625   16.18 ~ 9 0
12 OGLE BW9 V38 RR* 18 00 44.2293961504 -29 52 53.235253822     17.088   15.887 ~ 8 0
13 OGLE BW11 V10 RR* 18 00 44.7174409493 -30 21 35.635375491     17.005   15.608 ~ 7 0
14 OGLE BW9 V24 RR* 18 00 46.6719585843 -29 46 52.891249780     17.044   15.882 ~ 7 0
15 OGLE BW10 V21 RR* 18 00 49.5726464458 -30 08 04.804618182     16.881 16.23 15.476 ~ 11 0
16 OGLE BLG189.6 84582 RR* 18 00 56.9031265863 -30 00 39.265258476     17.404 16.76 15.954 ~ 11 0
17 OGLE BLG189.6 213903 RR* 18 01 03.3394654824 -29 56 49.428343627     17.016 16.57 15.776 ~ 9 0
18 OGLE BW11 V44 RR* 18 01 06.2242444603 -30 15 37.387145113     17.462   16.181 ~ 8 0
19 OGLE BW10 V66 RR* 18 01 07.8723678705 -30 01 03.762140919     17.671 17.17 16.258 ~ 9 0
20 OGLE BW10 V20 RR* 18 01 13.8843426550 -29 56 56.226821875     17.020 16.69 15.737 ~ 11 0
21 V* V4097 Sgr RR* 18 02 06.0787124927 -29 44 58.493931406   17.4 17.077 16.55 15.896 ~ 13 0
22 OGLE BW2 V10 RR* 18 02 06.10 -30 21 59.1     16.539   15.45 ~ 7 0
23 V* V1330 Sgr RR* 18 02 08.5952319004 -30 12 05.792647353     17.388   15.876 ~ 15 0
24 OGLE BW5 V34 RR* 18 02 15.8943433677 -30 05 09.787873618     17.441   16.087 ~ 9 0
25 V* V1352 Sgr RR* 18 02 32.4453512179 -29 58 56.850558611     16.912 16.34 15.651 ~ 18 0
26 V* V1369 Sgr RR* 18 02 38.9744260960 -29 51 56.704921663     16.855   15.716 ~ 13 0
27 V* V1367 Sgr RR* 18 02 39.1886002020 -30 07 07.878060078     17.262 16.62 15.853 ~ 17 0
28 V* V1384 Sgr RR* 18 02 49.0944525805 -30 00 53.548352337     16.745   15.706 ~ 14 0
29 OGLE BW2 V23 RR* 18 02 49.42 -30 12 54.0     16.47     ~ 5 0
30 V* V1386 Sgr RR* 18 02 51.9092177917 -30 08 03.741160676     17.271 16.73 15.960 ~ 16 0
31 V* V1392 Sgr RR* 18 02 57.3607779666 -30 00 06.819877148     17.036   15.830 ~ 15 0
32 V* V1405 Sgr RR* 18 03 03.7326999182 -30 04 00.873479771     18.207   16.987 ~ 13 0
33 OGLE BLG513.4 91188 RR* 18 03 05.15 -30 20 30.2     16.678   15.553 ~ 10 0
34 V* V1408 Sgr RR* 18 03 07.7717038615 -29 50 05.971732498     16.459   15.454 ~ 16 0
35 V* V4111 Sgr RR* 18 03 07.9496048946 -29 44 06.661004878   17.0 16.731   15.737 ~ 12 0
36 OGLE BW6 V20 RR* 18 03 08.1729294115 -30 17 48.603204458     17.030 16.70 15.974 ~ 11 0
37 V* V1409 Sgr RR* 18 03 09.5481127508 -30 11 57.447519271     16.922 16.33 15.634 ~ 15 0
38 V* V1415 Sgr RR* 18 03 15.8369533877 -30 08 56.908257366     17.274   15.972 ~ 15 0
39 OGLE BLG-RRLYR-11978 RR* 18 03 17.0953565798 -29 57 23.909715337     17.036   15.810 ~ 12 0
40 V* V1427 Sgr RR* 18 03 24.1674691535 -30 05 13.362015947     16.793 16.44 15.694 ~ 18 0
41 V* V4113 Sgr RR* 18 03 29.8799960420 -30 01 56.632241651   17.1 16.680   15.762 ~ 14 0
42 OGLE BW6 V29 RR* 18 03 39.8613242932 -30 22 03.524258171     17.319   15.946 ~ 8 0
43 OGLE BW6 V18 RR* 18 03 43.3481779340 -30 18 44.622167583     17.238   15.906 ~ 10 0
44 OGLE BW3 V17 RR* 18 03 54.7875757334 -30 20 37.862359518     17.179   16.017 ~ 10 0
45 V* V1465 Sgr RR* 18 03 55.9586116472 -30 12 46.285870873     16.877 16.39 15.756 ~ 18 0
46 V* V1496 Sgr RR* 18 04 19.6006595665 -29 58 26.774970196     16.397 15.91 15.285 ~ 17 0
47 V* V1498 Sgr RR* 18 04 22.4591634169 -29 54 41.373079221     16.727   15.44 ~ 14 0
48 V* V1516 Sgr RR* 18 04 29.5068816800 -30 01 07.792449834     16.955 16.26 15.657 ~ 14 0
49 V* V1523 Sgr RR* 18 04 31.7554586505 -30 02 40.703318622     16.854   15.783 ~ 15 0
50 V* V1550 Sgr RR* 18 04 50.3583224681 -30 06 30.434667221     17.585   16.252 ~ 11 0
51 V* V1551 Sgr RR* 18 04 50.3737323600 -30 07 49.590778407     17.778 17.16 16.23 ~ 14 0
52 NAME Galactic Bulge reg ~ ~           ~ 3242 0

    Equat.    Gal    SGal    Ecl

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2019.11.12-23:32:59

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