J/ApJ/814/71 Carina project IX: UBVI data of Carina variables (Coppola+, 2015)
The Carina project IX: on hydrogen and helium burning variables.
Coppola G., Marconi M., Stetson P.B., Bono G., Braga V.F., Ripepi V.,
Dall'Ora M., Musella I., Buonanno R., Fabrizio M., Ferraro I.,
Fiorentino G., Iannicola G., Monelli M., Nonino M., Thevenin F.,
Walker A.R.
<Astrophys. J., 814, 71 (2015)>
=2015ApJ...814...71C 2015ApJ...814...71C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, UBVRI
Keywords: galaxies: individual: Carina; Local Group; stars: distances;
stars: oscillations, including pulsations; stars: variables: RR Lyrae
Abstract:
We present new multiband (UBVI) time-series data of helium burning
variables in the Carina dwarf spheroidal galaxy. The current sample
includes 92 RR Lyrae --six of them are new identifications-- and 20
Anomalous Cepheids, one of which is new identification. The analysis
of the Bailey diagram shows that the luminosity amplitude of the first
overtone component in double-mode variables is located along the
long-period tail of regular first overtone variables, while the
fundamental component is located along the short-period tail of
regular fundamental variables. This evidence further supports the
transitional nature of these objects. Moreover, the distribution of
Carina double-mode variables in the Petersen diagram (P1/P0 versus
P0) is similar to metal-poor globulars (M15, M68), to the dwarf
spheroidal Draco, and to the Galactic Halo. This suggests that the
Carina old stellar population is metal-poor and affected by a small
spread in metallicity. We use trigonometric parallaxes for five field
RR Lyrae stars to provide an independent estimate of the Carina
distance using the observed reddening free Period-Wesenheit [PW,(BV)]
relation. Theory and observations indicate that this diagnostic is
independent of metallicity. We found a true distance modulus of
µ=20.01±0.02 (standard error of the mean)±0.05 (standard
deviation) mag. We also provided independent estimates of the Carina
true distance modulus using four predicted PW relations (BV, BI, VI,
BVI) and we found: µ=(20.08±0.007±0.07)mag,
µ=(20.06±0.006±0.06)mag, µ=(20.07±0.008±0.08)mag, and
µ=(20.06±0.006±0.06)mag. Finally, we identified more than 100
new SX Phoenicis stars that together with those already known in the
literature (340) make Carina a fundamental laboratory for constraining
the evolutionary and pulsation properties of these transitional
variables.
Description:
The photometric catalog adopted in this investigation is an extension
of the data set discussed by Coppola+ (Paper VI; 2013ApJ...775....6C 2013ApJ...775....6C).
This included 4474 CCD images in the UBVRI photometric bands obtained
with the CTIO 4m and 1.5m telescopes, the ESO 3.6m NTT, the MPI/ESO
2.2m telescope, and the 8m ESO VLT during the period 1992 December
through 2008 September. Here we add 2028 CCD images in the same
photometric bands obtained with the same telescopes during the period
1998 October through 2012 February.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 69 125 Catalog of Carina variable stars
table3.dat 49 103 Catalog of candidate variable stars that according
to the current investigation are not variable
table4.dat 112 23976 Photometry of the Carina variable stars
table5.dat 90 117 Pulsation properties of Carina variable stars
table12.dat 56 102 Pulsation properties of the new Carina SX Phe
table13.dat 60 333 Pulsation properties of the known Carina SX Phe
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
J/A+A/580/A18 : Carina Project VIII. Abundances (Fabrizio+, 2015)
J/A+A/572/A10 : (BV) photometry in Carina dSph (de Boer+, 2014)
J/PASP/126/521 : UBVRIJHK photometry of RR Lyrae in M4 (Stetson+, 2014)
J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013)
J/AJ/146/141 : BV photometry of dwarf Cepheids in Carina (Vivas+, 2013)
J/AJ/146/101 : LINEAR. III. Catalog of periodic variables (Palaversa+, 2013)
J/ApJ/767/62 : RR Lyrae stars BV photometry in UMa I (Garofalo+, 2013)
J/MNRAS/429/385 : Short-period variables near GC (Matsunaga+, 2013)
J/ApJ/756/121 : Variable stars in Her dwarf galaxy (Musella+, 2012)
J/AJ/144/4 : Dwarf galaxies in the Local Group (McConnachie+, 2012)
J/ApJ/752/42 : BV time series in Ursa Major II (Dall'Ora+, 2012)
J/MNRAS/422/89 : Cetus dSph RR Lyrae (Monelli+, 2012)
J/ApJ/696/870 : Catalina Real-time Transient Survey (CRTS) (Drake+, 2009)
J/AJ/136/2441 : Metallicity of RR0 Lyrae in galactic bulge (Kunder+, 2008)
J/ApJ/678/865 : LONEOS-I RR Lyrae stars (Miceli+, 2008)
J/ApJ/674/L81 : Variable stars in dwarf galaxy CVn I (Kuehn+, 2008)
J/AJ/127/1158 : QUEST RR Lyrae Survey first catalog (Vivas+, 2004)
J/AJ/126/197 : Carina projects. I. Bright variables stars (Dall'Ora+, 2003)
J/AJ/115/1856 : Dwarf Cepheids in Carina (Mateo+, 1998)
J/A+AS/121/327 : RR Lyr pulsational model (Bono+ 1997)
J/AJ/108/1016 : Kinematics of local RR lyrae stars. I. (Layden, 1994)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- --- [V]
2- 4 I3 --- [SMS86] [3/237] Identifier (1)
6 A1 --- f_[SMS86] [*] * = Newly detected variables in this paper
8- 9 I2 h RAh [6] Hour of Right Ascension (J2000)
11- 12 I2 min RAm [39/43] Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs Second of Right Ascension (J2000)
20 A1 --- DE- [-] Sign of the Declination (J2000)
21- 22 I2 deg DEd [50/51] Degree of Declination (J2000)
24- 25 I2 arcmin DEm Arcminute of Declination (J2000)
27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000)
32- 38 A7 --- TS86 Type from S86 (G1)(G2)
40- 43 A4 --- D03 Identifier from Paper I (D03; V7-V126) (G1)
45- 47 A3 --- TD03 Type from D03 (G2)
49- 50 I2 --- VM13 [2/37]? Identifier from VM13 (G1)
52- 54 A3 --- TVM13 Type from VM13 (G2)
56- 59 A4 --- C13 Identifier from Paper VI (C13; V7-V126) (G1)
61- 64 A4 --- TC13 Type from C13 (G2)
66- 69 A4 --- Type Type from this work (G2)
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Note (1): The identification number according to Saha+, 1986AJ.....92..302S 1986AJ.....92..302S
and D03: Dall'Ora+, 2003, J/AJ/126/197 (<[SMS86] NNN> in Simbad). For
the newly detected variables (#208-237) in this paper and in Paper VI
(Coppola+, 2013ApJ...775....6C 2013ApJ...775....6C) the D03 running number was continued.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- --- [V]
2- 4 I3 --- [SMS86] [1/172] Identifier
6- 7 I2 h RAh [6] Hour of Right Ascension (J2000)
9- 10 I2 min RAm [37/43] Minute of Right Ascension (J2000)
12- 16 F5.2 s RAs Second of Right Ascension (J2000)
18 A1 --- DE- [-] Sign of the Declination (J2000)
19- 20 I2 deg DEd [50/51] Degree of Declination (J2000)
22- 23 I2 arcmin DEm Arcminute of Declination (J2000)
25- 28 F4.1 arcsec DEs Arcsecond of Declination (J2000)
30- 39 A10 --- TS86 Type from S86 (G1)(G2)
41- 42 A2 --- TD03 Type from D03 (G1)(G2)
44 A1 --- f_TD03 [ab] Flag on D03 (1)
46- 47 A2 --- Type Type from this work (G2)
49 A1 --- f_Type [a-e] Flag on Type (1)
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Note (1): Flag as follows:
a = Possible field galaxy.
b = Possible blend.
c = Located close to a bright or faint star.
d = Saturated star.
e = Faint star.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- --- [V]
2- 4 I3 --- [SMS86] [3/237] Identifier
6- 17 F12.4 d HJDV Heliocentric Julian Date of V band observation
19- 24 F6.3 mag Vmag [14.4/22.8] V band magnitude
26- 31 F6.4 mag e_Vmag [0.001/0.3] The 1σ uncertainty in Vmag
33- 44 F12.4 d HJDB ? Heliocentric Julian Date of Bband observation
46- 51 F6.3 mag Bmag [15.1/23.1]? B band magnitude
53- 58 F6.4 mag e_Bmag [0.001/0.09]? The 1σ uncertainty in Bmag
60- 71 F12.4 d HJDI ? Heliocentric Julian Date of I band observation
73- 78 F6.3 mag Imag [13.6/22.5]? I band magnitude
80- 85 F6.4 mag e_Imag [0.002/0.2]? The 1σ uncertainty in Imag
87- 98 F12.4 d HJDU ? Heliocentric Julian Date of U band observation
100-105 F6.3 mag Umag [15.4/25.4]? U band magnitude
107-112 F6.4 mag e_Umag [0.002/2.3]? The 1σ uncertainty in Umag
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [SMS86] [3/237] Identification number
5- 8 A4 --- Type Variable type (G2)
10- 19 F10.4 d Epoch [51519.2/52401.1] Epoch of maximum light
21- 32 F12.8 d Per [0.26/685] Period
33 A1 --- f_Per [d] Flag on Per (1)
35- 40 F6.3 mag <Umag> [15.5/24.5]? Intensity-averaged U magnitude
41 A1 --- f_<Umag> [c] Flag on <Umag> (1)
43- 48 F6.3 mag <Bmag> [15.3/22.6] Intensity-averaged B magnitude
49 A1 --- f_<Bmag> [c] Flag on <Bmag> (1)
51- 57 F7.4 mag <Vmag> [14.6/22.4] Intensity-averaged V magnitude
58 A1 --- f_<Vmag> [c] Flag on <Vmag> (1)
60- 65 F6.3 mag <Imag> [13.8/22.4] Intensity-averaged I magnitude
66 A1 --- f_<Imag> [c] Flag on <Imag> (1)
68- 72 F5.3 mag Au [0.3/1.5]? U-band extinction
74- 78 F5.3 mag Ab [0.09/1.6]? B-band extinction
80- 84 F5.3 mag Av [0.07/1.3]? V-band extinction
86- 90 F5.3 mag Ai [0.04/0.9]? I-band extinction
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Note (1): Flag as follows:
c = Median of individual magnitude measurements.
d = Not enough data to fit a light curve, uncertain parameters.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table12.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- [CMS2015] [341/442] Star identifier
5- 6 I2 h RAh [6] Hour of right ascension (J2000)
8- 9 I2 min RAm [40/43] Minute of right ascension (J2000)
11- 15 F5.2 s RAs Second of right ascension (J2000)
17 A1 --- DE- [-] Sign of declination (J2000)
18- 19 I2 deg DEd [50/51] Degree of declination (J2000)
21- 22 I2 arcmin DEm Arcminute of declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of declination (J2000)
29- 38 F10.8 d Per [0.04/0.2] Period
40- 44 F5.2 mag <Bmag> [22.7/23.5] Intensity-averaged B magnitude
46- 50 F5.2 mag <Vmag> [22.4/23.2] Intensity-averaged V magnitude
52- 56 F5.2 mag <Imag> [21.8/23.2] Intensity-averaged I magnitude
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Byte-by-byte Description of file: table13.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- ID [7/338]? Star identifier
(<[VM2013] DC-NNN> in Simbad)
5- 6 I2 h RAh [0/6] Hour of right ascension (J2000)
8- 9 I2 min RAm [4/44] Minute of right ascension (J2000)
11- 15 F5.2 s RAs Second of right ascension (J2000)
17 A1 --- DE- [-] Sign of declination (J2000)
18- 19 I2 deg DEd [50/51] Degree of declination (J2000)
21- 22 I2 arcmin DEm Arcminute of declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of declination (J2000)
29- 38 F10.8 d Per [0.03/0.8] Period
40- 44 F5.2 mag <Bmag> [22.2/23.6] Intensity-averaged B magnitude
46- 50 F5.2 mag <Vmag> [21.9/23.3] Intensity-averaged V magnitude
52- 56 F5.2 mag <Imag> [17.1/22.9]? Intensity-averaged I magnitude
58- 60 A3 --- [MHN98] M98 identifier (V1-V20) (1)
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Note (1): M98 = Mateo et al. 1998, J/AJ/115/1856 (<[MHN98] VNN> in Simbad)
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Global notes:
Note (G1): References as below:
D03 = Paper I; Dall'Ora et al. 2003, J/AJ/126/197 (<[SMS86] NNN> in Simbad),
S86 = Saha, Monet & Seitzer 1986AJ.....92..302S 1986AJ.....92..302S (<[SMS86] NNN> in Simbad),
VM13 = Vivas & Mateo 2013, J/AJ/146/141 (<[VM2013] RRL-NN> or
<[VM2013] AC-NN> in Simbad),
C13 = Paper VI; Coppola et al. 2013ApJ...775....6C 2013ApJ...775....6C (<[SMS86] NNN> in Simbad)
Note (G2): Type as follows:
NV = No variability detected (only for table 3)
EB = Eclipsing binary
SV = Suspected variable
FV = Field variable
RGB = Variable located along the RGB
ab = RR Lyrae ab type (fundamental mode, RRab)
c = RR Lyrae c type (first-overtone, RRc)
d = RR Lyrae d type (double-mode pulsator, RRd)
AC = Anomalous Cepheid
LPV = Long-Period variable
Bl = candidate Blazhko variable
WUma = W Uma variable
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History:
From electronic version of the journal
Acknowledgements:
Marcella Marconi (oacn.inaf.it) for U-band magnitudes in table 4.
Individual U-band magnitudes for V41 could not be retrieved.
References:
Saha et al. RRL in Carina 1986AJ.....92..302S 1986AJ.....92..302S
Dall'ora et al. Paper I. 2003AJ....126..197D 2003AJ....126..197D Cat. J/AJ/126/197
Monelli et al. Paper II. 2003AJ....126..218M 2003AJ....126..218M
Fabrizio et al. Paper IV. 2011PASP..123..384F 2011PASP..123..384F
Fabrizio et al. Paper V. 2012PASP..124..519F 2012PASP..124..519F Cat. J/PASP/124/519
Coppola et al. Paper VI. 2013ApJ...775....6C 2013ApJ...775....6C
Monelli et al. Paper VII. 2014ApJ...796...90M 2014ApJ...796...90M
Fabrizio et al. Paper VIII. 2015A&A...580A..18F 2015A&A...580A..18F Cat. J/A+A/580/A18
Fabrizio et al. Paper X. 2016ApJ...830..126F 2016ApJ...830..126F Cat. J/ApJ/830/126
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 23-Feb-2016