2006PASP..118..405O


Query : 2006PASP..118..405O

2006PASP..118..405O - Publ. Astron. Soc. Pac., 118, 405-409 (2006/March-0)

A double-mode RR Lyrae star with a strong fundamental-mode component.

OASTER L., SMITH H.A. and KINEMUCHI K.

Abstract (from CDS):

NSVS 5222076, a 13th magnitude star in the Northern Sky Variability Survey, was identified by L. Oaster as a possible new double-mode RR Lyrae star. We confirm the double-mode nature of NSVS 5222076, supplementing the survey data with new V-band photometry. NSVS 5222076 has a fundamental-mode period (P0) of 0.4940 days and a first-overtone period (P1) of about 0.3668 days, giving a period ratio of P1/P0=0.743. In most double-mode RR Lyrae stars, the amplitude of the first-overtone mode's pulsation is greater than that of the fundamental-mode pulsation. That is not true for this star. Its fundamental-mode light curve has an amplitude twice as large as that of the first-overtone mode, a ratio very rarely seen even among the double-mode RR Lyrae stars that have relatively strong fundamental-mode pulsation. Data from the literature are used to discuss the location in the Petersen diagram of double-mode RR Lyrae stars having strong fundamental-mode pulsation. Such stars tend to occur toward the short-period end of the Petersen diagram, and NSVS 5222076 is no exception to this rule.

Abstract Copyright:

Journal keyword(s): Stars: Variables: Other

Nomenclature: Text: NOMAD1 NNNN-NNNNNNN N=2.

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1236 4
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16071 1
3 NGC 5272 644 RR* 13 42 09.5850317088 +28 20 24.465210468   15.986 15.690   15.279 ~ 20 0
4 Cl* NGC 5272 SAW V200 RR* 13 42 11.302 +28 23 04.25           ~ 14 0
5 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2375 0
6 V* V338 Boo RR* 15 46 26.1422205480 +44 18 47.172522024   12.76 13.00     ~ 13 0
7 UCAC2 46957962 * 15 46 34.4954892672 +44 25 28.616061864   14.200 13.630     ~ 1 0
8 GSC 03060-00569 * 15 46 48.6276417384 +44 23 21.892032276   13.600 13.200     ~ 2 0
9 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1248 1
10 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1958 2
11 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 3026 0
12 GSC2 N132113394 * ~ ~           ~ 1 0
13 GSC2 N1321133346 * ~ ~           ~ 1 0

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2022.07.05-07:39:18

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