J/MNRAS/446/3034 LMC Type II Cepheids J and Ks light curves (Ripepi+, 2015)
The VMC Survey. XIII. Type II Cepheids in the Large Magellanic Cloud.
Ripepi V., Moretti M.I., Marconi M., Clementini G., Cioni M.-R.L.,
De Grijs R., Emerson J.P., Groenewegen M.A.T., Ivanov V.D., Muraveva T.,
Piatti A.E., Subramanian S.
<Mon. Not. R. Astron. Soc., 446, 3034-3061 (2015)>
=2015MNRAS.446.3034R 2015MNRAS.446.3034R (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Photometry
Keywords: surveys - stars: oscillations - stars: Population II -
stars: variables: Cepheids - galaxies: distances and redshifts -
Magellanic Clouds
Abstract:
The VISTA (Visible and Infrared Survey Telescope for Astronomy) survey
of the Magellanic Clouds System (VMC) is collecting deep Ks-band
time-series photometry of the pulsating variable stars hosted in the
system formed by the two Magellanic Clouds and the Bridge connecting
them. In this paper, we have analysed a sample of 130 Large Magellanic
Cloud (LMC) Type II Cepheids (T2CEPs) found in tiles with complete or
near-complete VMC observations for which identification and optical
magnitudes were obtained from the OGLE III (Optical Gravitational
Lensing Experiment) survey. We present J and Ks light curves for all
130 pulsators, including 41 BL Her, 62 W Vir (12 pW Vir) and 27 RV Tau
variables. We complement our near-infrared photometry with the V
magnitudes from the OGLE III survey, allowing us to build a variety of
period-luminosity (PL), period-luminosity-colour (PLC) and
period-Wesenheit (PW) relationships, including any combination of the
V, J, Ks filters and valid for BL Her and W Vir classes. These
relationships were calibrated in terms of the LMC distance modulus,
while an independent absolute calibration of the PL(Ks) and the PW(Ks,
V) was derived on the basis of distances obtained from Hubble Space
Telescope parallaxes and Baade-Wesselink technique. When applied to
the LMC and to the Galactic globular clusters hosting T2CEPs, these
relations seem to show that (1) the two Population II standard candles
RR Lyrae and T2CEPs give results in excellent agreement with each
other; (2) there is a discrepancy of ∼0.1mag between Population II
standard candles and classical Cepheids when the distances are gauged
in a similar way for all the quoted pulsators. However, given the
uncertainties, this discrepancy is within the formal 1σ
uncertainties.
Description:
In this paper, we present results for the T2CEPs included on 13
'tiles' (1.5deg2) completely or nearly completely observed,
processed and catalogued by the VMC survey as of 2013 March (and
overlapping with the area investigated by OGLE III), namely the tiles
LMC 4_6, 4_8, 5_3, 5_5, 5_7, 6_4, 6_5, 6_6, 6_8, 7_3, 7_5, 7_7 and
8_8. Tile LMC 6_6 is centred on the well-known 30 Dor star-forming
region; tiles LMC 5_5, 6_4 and 6_5 are placed on the bar of the LMC.
The remaining tiles lie in less crowded regions of the galaxy.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 119 130 Cross-identification and main characteristics of
the T2CEPs in the 13 'tiles' analysed in
this paper
table4.dat 80 120 Results for the 120 T2CEPs with useful NIR light
curves analysed in this paper
lc/* . 260 Individual light curves in J and Ks bands
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See also:
J/AcA/58/293 : Type-II and anomalous Cepheids in LMC (Soszynski+, 2008)
J/A+A/531/A157 : LMC planetary nebulae (VMC Survey II) (Miszalski+, 2011)
J/A+A/537/A105 : Modelisation of AGB stars in the LMC (Gullieuszik+, 2012)
J/MNRAS/424/1807 : VISTA Magellanic Cloud Survey. V. Cepheids (Ripepi+, 2012)
J/A+A/549/A29 : Quasars behind the Magellanic system (Cioni+, 2013)
J/A+A/554/A33 : VMC Survey. VII. 30 Doradus reddening map (Tatton+, 2013)
J/MNRAS/437/2307 : LMC anomalous Cepheid Ks light curves (Ripepi+, 2014)
J/MNRAS/437/2702 : MC Cepheids, RR Lyrae stars and binaries (Moretti+, 2014)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- --- [OGLE-LMC-T2CEP-]
16- 18 I03 --- OGLE OGLE identification number NNN,
OGLE LMC-T2CEP-NNN in Simbad
20- 21 I2 h RAh Right ascension (OGLE) (J2000)
23- 24 I2 min RAm Right ascension (OGLE) (J2000)
26- 30 F5.2 s RAs Right ascension (OGLE) (J2000)
32 A1 --- DE- Declination sign (OGLE) (J2000)
33- 34 I2 deg DEd Declination (OGLE) (J2000)
36- 37 I2 arcmin DEm Declination (OGLE) (J2000)
39- 42 F4.1 arcsec DEs Declination (OGLE) (J2000)
44- 49 A6 --- Type Variability class
51- 56 F6.3 mag <Imag> Intensity-averaged I magnitude (OGLE)
58- 64 F7.3 mag <Vmag> ?=-99.99 Intensity-averaged V magnitude (OGLE)
66- 74 F9.6 d Per Period (OGLE)
77- 86 F10.5 d Epoch Epoch of maximum light (HJD-2450000) (OGLE)
88- 99 I12 --- VMC-ID VMC identification as in the internal VSA
release VMC v1.2/v1.3 (2013 August 5)
101-103 A3 --- Tile VMC tile
105-106 I2 --- NJep Number of J epochs
108-109 I2 --- NKsep Number of Ks epochs
111-119 A9 --- Note Notes on individual stars (1)
--------------------------------------------------------------------------------
Note (1): Notes as follows:
a = Large separation (>0.5=arcsec) between VMC and OGLE III star centroids
likely due to crowding
b = blended object
c = faint object
d = poor light curve
e = very low amplitude in the optical
f = source lies within a strip of the tile that has half the exposure of most
of the tile (see Cross et al., 2012A&A...548A.119C 2012A&A...548A.119C)
g = poorly sampled or heavily dispersed light curve (due to e.g. blending,
saturation)
h = source image comes partly from detector 16 (on the top half of detector
16, the quantum efficiency varies on short time-scales making
flat-fields inaccurate; Cross et al., 2012A&A...548A.119C 2012A&A...548A.119C)
i = missing OGLE V magnitude
j = light curve showing pulsation plus eclipse according to OGLE III
k = correction for saturation not effective
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- --- [OGLE-LMC-T2CEP-]
16- 18 I03 --- OGLE OGLE identification number NNN,
OGLE LMC-T2CEP-NNN in Simbad
20- 25 A6 --- Type Variability class
27- 36 F10.7 d Per Period (OGLE)
38- 43 F6.3 mag <Jmag> Intensity-averaged J magnitude
45- 49 F5.3 mag e_<Jmag> rms uncertainty on <Jmag>
51- 56 F6.3 mag <Ksmag> Intensity-averaged Ks magnitude
58- 62 F5.3 mag e_<Ksmag> rms uncertainty on <Ksmag>
64- 67 F4.2 mag AmpJ Peak-to-peak amplitude in J band
69- 72 F4.2 mag AmpKs Peak-to-peak amplitude in Ks band
74- 78 F5.3 mag E(V-I) Adopted reddening (V-I colour excess)
80 A1 --- Note [TS] Note (1)
--------------------------------------------------------------------------------
Note (1): Notes as follows:
T = results in J obtained on the basis of the Ks template
S = results in J obtained on the basis of direct spline fitting to the data
--------------------------------------------------------------------------------
Byte-by-byte Description of file: lc/*
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
4- 14 F11.5 d HJD Heliocentric Julian date (HJD-2400000)
19- 24 F6.3 mag mag Magnitude in band (J or Ks)
30- 34 F5.3 mag e_mag rms uncertainty on mag
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History:
From electronic version of the journal
References:
Cioni et al. Paper I 2011A&A...527A.116C 2011A&A...527A.116C
Miszalski et al. Paper II 2011A&A...531A.157M 2011A&A...531A.157M Cat. J/A+A/531/A157
Gullieuszik et al. Paper III 2012A&A...537A.105G 2012A&A...537A.105G Cat. J/A+A/537/A105
Rubele et al. Paper IV 2012A&A...537A.106R 2012A&A...537A.106R
Ripepi et al. Paper V 2012MNRAS.424.1807R 2012MNRAS.424.1807R Cat. J/MNRAS/424/1807
Cioni et al. Paper VI 2013A&A...549A..29C 2013A&A...549A..29C Cat. J/A+A/549/A29
Tatton et al. Paper VII 2013A&A...554A..33T 2013A&A...554A..33T Cat. J/A+A/554/A33
Ripepi et al. Paper VIII 2014MNRAS.437.2307R 2014MNRAS.437.2307R Cat. J/MNRAS/437/2307
Cioni et al. Paper IX 2014A&A...562A..32C 2014A&A...562A..32C
Moretti et al. Paper X 2014MNRAS.437.2702M 2014MNRAS.437.2702M Cat. J/MNRAS/437/2702
Li et al. Paper XI 2014ApJ...790...35L 2014ApJ...790...35L
Piatti et al. Paper XII 2014A&A...570A..74P 2014A&A...570A..74P
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Rubele et al. Paper XIV 2015MNRAS.449..639R 2015MNRAS.449..639R Cat. J/MNRAS/449/639
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Ripepi et al. Paper XXV 2017MNRAS.472..808R 2017MNRAS.472..808R
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Sun et al. Paper XXVII 2017ApJ...849..149S 2017ApJ...849..149S Cat. J/ApJ/849/149
Niederhofer et al. Paper XXVIII 2018A&A...612A.115N 2018A&A...612A.115N
Sun et al. Paper XXIX 2018ApJ...858...31S 2018ApJ...858...31S This catalog
Niederhofer et al. Paper XXX 2018A&A...613L...8N 2018A&A...613L...8N
Rubele et al. Paper XXXI 2018MNRAS.478.5017R 2018MNRAS.478.5017R
Zivkov et al. Paper XXXII 2018A&A...620A.143Z 2018A&A...620A.143Z
Groenewegen et al. Paper XXXIII 2019A&A...622A..63G 2019A&A...622A..63G
(End) Patricia Vannier [CDS] 26-Jun-2015