J/ApJS/219/25 Light curves of RR Lyrae stars in M3 (NGC5272) (Jurcsik+, 2015)
Overtone and multi-mode RR Lyrae stars in the globular cluster M3.
Jurcsik J., Smitola P., Hajdu G., Sodor A., Nuspl J., Kolenberg K.,
Furesz G., Moor A., Kun E., Pal A., Bakos J., Kelemen J., Kovacs T.,
Kriskovics L., Sarneczky K., Szalai T., Szing A., Vida K.
<Astrophys. J. Suppl. Ser., 219, 25 (2015)>
=2015ApJS..219...25J 2015ApJS..219...25J (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, UBVRI
Keywords: globular clusters: individual: M3; stars: variables: RR Lyrae ;
stars: horizontal-branch; stars: oscillations
Abstract:
The overtone and multi-mode RR Lyrae stars in the globular cluster M3
are studied using a 200 day long, B,V, and lc time-series photometry
obtained in 2012. 70% of the 52 overtone variables observed show some
kind of multi-periodicity (with additional frequency at
f0.61=f1O/0.61 frequency ratio, Blazhko effect, double/multi-mode
pulsation, and period doubling). A signal at the 0.587 frequency ratio
to the fundamental-mode frequency is detected in the double-mode star,
V13, which may be identified as the second radial overtone mode. If
this mode identification is correct, then V13 is the first RR Lyrae
star showing triple-mode pulsation of the first three radial modes.
Either the Blazhko effect or the f0,61 frequency (or both of these
phenomena) appears in seven double-mode stars. The P1O/PF period
ratio of RRd stars showing the Blazhko effect are anomalous. A
displacement of the main frequency component at the fundamental mode
with the value of modulation frequency (or its half), is detected in
three Blazhko RRd stars that are parallel with the appearance of the
overtone-mode pulsation. The f0.61 frequency appears in RRc stars
that lie at the blue side of the double-mode region and in RRd stars,
raising the suspicion that its occurrence may be connected to
double-mode pulsation. The changes of the Blazhko and double-mode
properties of the stars are also reviewed using the recent and archive
photometric data.
Description:
An extended photometric campaign was organized to observe M3 with the
Konkoly Observatory 90/60cm Schmidt telescope equipped with a
4096x4096 Apogee CCD camera and Bessel BVIc filters. About 1000
measurements were obtained in each band between 2012 January and July.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 25 80360 BVIC CCD observations of M3 variables
table2.dat 27 23300 Flux data of M3 variables with uncertain magnitudes
in the reference frame in B band
table3.dat 109 42 Summary of the photometric properties of the
overtone-mode variables in M3
table4.dat 112 21 Summary of the photometric properties of 10
double/triple-mode variables in M3
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See also:
I/278 : Catalog of stars in M3 (von Zeipel, 1908)
J/A+A/570/A100 : BVRc light curves of 5 CoRoT RR Lyrae stars (Szabo+, 2014)
J/ApJS/213/31 : Blazhko effect from 4yr of Kepler data (Benko+, 2014)
J/AJ/144/39 : Galactic RRab from the GEOS RR Lyr Survey (Le Borgne+, 2012)
J/MNRAS/423/993 : BVI light curves of RZ Lyr (Jurcsik+, 2012)
J/MNRAS/419/2173 : Long-term photometry of M3 RR Lyrae (Jursik+, 2012)
J/AcA/61/1 : VI LCs of Galactic Bulge RR Lyrae (Soszynski+, 2011)
J/AcA/60/17 : VI light curves of SMC classical Cepheids (Soszynski+, 2010)
J/PASP/121/1378 : Positions of variable stars in GCs (Samus+, 2009)
J/MNRAS/372/1657 : BVI(c) light curves of variables in M3 (Benko+, 2006)
J/AJ/129/1596 : BVI photometric variability survey of M3 (Hartman+, 2005)
J/AJ/129/303 : Abundances of stars in M3 and M13 (Cohen+, 2005)
J/AJ/129/267 : RR Lyrae variables in NGC 5272 (Cacciari+, 2005)
J/A+A/419/139 : JK photometry on 5 Galactic GCs (Valenti+, 2004)
J/AJ/122/3219 : M3 and M13 CCD BV photometry (Rey+, 2001)
J/AcA/50/221 : Astrometry of variable stars in M 3 (Bakos+, 2000)
J/AJ/117/247 : Ages for globular clusters in the halo (Stetson+, 1999)
J/AJ/108/1786 : Blue stragglers & variable stars in M3 (Guhathakurta+, 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Star Variable identifier (G1)
6- 16 F11.5 d HJD Heliocentric Julian Date of mid-exposure;
JD-2400000
18- 23 F6.3 mag mag [14.7/16.6] Observed magnitude in Band
25 A1 --- Band [BIV] Filter used in the observation (2)
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Note (2): V,B,I referring to standard V,B,I(C) photometric bands.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Star Variable identifier (G1)
6- 16 F11.5 d HJD Heliocentric Julian Date of mid-exposure;
JD-2400000
18- 27 F10.1 --- Flux [-68082/89709] Flux difference of
ISIS photometry in B band (2)
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Note (2): From Alard, C. 2000A&AS..144..363A 2000A&AS..144..363A In ADUs.
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- Star Variable identifier (G1)
6 A1 --- f_Star [*] *: photometry contaminated (1)
8- 10 A3 --- Mode Mode (1O: first overtone; 2O: second overtone;
F: fundamental mode)
12- 18 F7.5 d Per [0.2/0.51] Period
20- 25 F6.3 mag <Bmag> ? B-band magnitude-averaged mean magnitude
27- 32 F6.3 mag Bmag ? B-band intensity-averaged mean magnitude
34- 39 F6.3 mag <Vmag> ? V-band magnitude-averaged mean magnitude
41- 46 F6.3 mag Vmag ? V-band intensity-averaged mean magnitude
48- 53 F6.3 mag <Icmag> [14.9/15.5]? Ic-band magnitude-averaged
mean magnitude
55- 60 F6.3 mag Icmag ? Ic-band intensity-averaged mean magnitude
62- 66 F5.3 mag Bamp1 ? Peak to peak B-band amplitude or maximum (2)
67 A1 --- --- [-]
68- 71 F4.2 mag Bamp2 ? Minimum B-band amplitude (2)
73- 77 F5.3 mag Vamp1 ? Peak to peak B-band amplitude or maximum (2)
78 A1 --- --- [-]
79- 82 F4.2 mag Vamp2 ? Minimum B-band amplitude (2)
84- 88 F5.3 mag Iamp1 [0.005/0.5]? Peak to peak B-band amplitude or
maximum (2)
89 A1 --- --- [-]
90- 93 F4.2 mag Iamp2 [0.05/0.3]? Minimum B-band amplitude (2)
95- 98 F4.2 --- R ? Amplitude ratio relative to the
amplitude of the 1O mode in the B band
99 A1 --- f_R [i] Flag on R (3)
101-105 A5 --- F f0.61: frequency at f10/f0.61∼0.61-0.62
106 A1 --- f_F [lg] Flag on F (3)
108-109 A2 --- Bl Bl: Blazhko effect
111-112 A2 --- P PD: Period doubling
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Note (1):
* = stars with photometry contaminated by signals of nearby variables.
Note (2): Maximum and minimum amplitudes are given for Blazhko stars.
Note (3): Flag as follows:
i = Non-calibrated data, transformed to magnitude with an uncertain
zero point.
g = The f0.61 frequency is detected only in the V data.
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Global note:
Note (G1): From Samus et al. 2009, Cat. J/PASP/121/1378
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 25-Sep-2015