J/MNRAS/473/3131 VMC survey. XXVI. SMC RR Lyrae stars (Muraveva+, 2018)
The VMC survey.
XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars.
Muraveva T., Subramanian S., Clementini G., Cioni M.-R.L., Palmer M.,
Van Loon J.T., Moretti M.I., De Grijs R., Molinaro R., Ripepi V.,
Marconi M., Emerson J., Ivanov V.D.
<Mon. Not. R. Astron. Soc., 473, 3131-3146 (2018)>
=2018MNRAS.473.3131M 2018MNRAS.473.3131M (SIMBAD/NED BibCode)
ADC_Keywords: Magellanic Clouds ; Stars, variable ; Photometry
Keywords: surveys - stars: variables: RR Lyrae - Magellanic Clouds -
galaxies: structure
Abstract:
We present results from the analysis of 2997 fundamental mode RR Lyrae
variables located in the Small Magellanic Cloud (SMC). For these
objects, near-infrared time series photometry from the VISTA survey of
the Magellanic Clouds system (VMC) and visual light curves from the
OGLE IV (Optical Gravitational Lensing Experiment IV) survey are
available. In this study, the multi-epoch Ks-band VMC photometry was
used for the first time to derive intensity-averaged magnitudes of the
SMC RR Lyrae stars. We determined individual distances to the RR Lyrae
stars from the near-infrared period-absolute magnitude-metallicity
(PMKsZ) relation, which has some advantages in comparison with
the visual absolute magnitude-metallicity (MV-[Fe/H]) relation,
such as a smaller dependence of the luminosity on interstellar
extinction, evolutionary effects and metallicity. The distances we
have obtained were used to study the three-dimensional structure of
the SMC. The distribution of the SMC RR Lyrae stars is found to be
ellipsoidal. The actual line-of-sight depth of the SMC is in the range
1-10kpc, with an average depth of 4.3±1.0kpc. We found that
RR Lyrae stars in the eastern part of the SMC are affected by
interactions of the Magellanic Clouds. However, we do not see a clear
bimodality observed for red clump stars, in the distribution of RR
Lyrae stars.
Description:
VMC (Cioni et al., 2011A&A...527A.116C 2011A&A...527A.116C, Cat. II/351) is an ongoing
imaging survey of the MS in the Y, J, Ks passbands, centred at
λ=1.02, 1.25 and 2.15um, respectively. It started in 2009 and
observations of the MS were 89 per cent complete as of 2017
September, while the observations of the SMC were 100 per cent
complete. The survey covers the LMC area (∼105deg2) with 68 tiles,
the SMC (∼42deg2) with 27 tiles, the MB area (∼21deg2) with 13
tiles and part of the Stream (∼3deg2) with two tiles. The VMC
Ks-band observations are taken over 13 separate epochs: 11 times with
an exposure time of 750s (deep epochs) and twice with an exposure
time of 375s (shallow epochs). Additional epochs may be obtained if
observations have to be repeated because the requested sky conditions
are not met.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 123 473 Properties of the 2997 RRab stars in the SMC
analysed in this paper
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See also:
II/351 : VISTA Magellanic Survey (VMC) catalog (Cioni+, 2011)
J/A+A/531/A157 : LMC planetary nebulae (VMC Survey II) (Miszalski+, 2011)
J/MNRAS/424/1807 : VISTA Magellanic Cloud Survey. V. Cepheids (Ripepi+, 2012)
J/A+A/549/29 : VMC Survey. VI. QSOs behind Magellanic system (Cioni+ 2013)
J/A+A/554/A33 : VMC Survey. VII. 30 Doradus reddening map (Tatton+, 2013)
J/MNRAS/437/2307 : VMC survey. VIII. LMC anomalous Cepheid (Ripepi+, 2014)
J/MNRAS/437/2702 : VMC survey. X. MC Cepheids, RR Lyr & binaries
(Moretti+, 2014)
J/MNRAS/446/3034 : VMC survey. XIII. LMC Type II Cepheids (Ripepi+, 2015)
J/MNRAS/449/639 : VMC survey. XIV. SFR in SMC (Rubele+, 2015)
J/MNRAS/454/839 : VMC survey. XVI. LMC clusters (Piatti+, 2015)
J/ApJS/224/21 : VMC survey. XIX. Classical Cepheids in SMC (Ripepi+, 2016)
J/MNRAS/459/1687 : VMC survey. XX. SMC new Cepheids light curves
(Moretti+, 2016)
J/ApJ/849/149 : VMC survey, XXVII. Young stellar structures in LMC
(Sun+, 2017)
J/ApJ/858/31 : VMC survey. XXIX. Star formation in SMC (Sun+, 2018)
J/A+A/636/A48 : VMC Survey. XXXVII. MC AGB stars (Groenewegen+, 2020)
J/AcA/66/131 : VI light curves of SMC and LMC RR Lyrae (Soszynski+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- VMC VMC identification, JHHMMSS.ss+DDMMSS.s
21- 39 A19 --- OGLE OGLE identification, OGLE-SMC-RRLYR-NNNN
41- 43 A3 --- Tile VMC tile identification number
45- 50 F6.3 mag Vmag ?=- V magnitude from OGLE IV catalogue
52- 57 F6.3 mag Imag I magnitude from OGLE IV catalogue
59- 67 F9.7 d Period Pulsation period from OGLE IV
69- 74 F6.3 mag Ks0mag Dereddened Ks magnitude
76- 80 F5.3 mag e_Ks0mag rms uncertainty in Ks0mag
82- 86 F5.3 mag AKs Amplitude of variation in Ks
88- 92 F5.2 mag E(V-I) Reddening
94- 97 F4.2 mag e_E(V-I) rms uncertainty on E(V-I)
99-104 F6.3 [-] [Fe/H] Metallicity (1)
106-110 F5.3 [-] e_[Fe/H] rms uncertainty on [Fe/H]
112-117 F6.3 mag (m-M)0 Dstance modulus
119-123 F5.3 mag e_(m-M)0 rms uncertainty on (m-M)0
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Note (1): Metallicity from Skowron et al. (2016AcA....66..269S 2016AcA....66..269S) transformed to
the metallicity scale defined by Gratton et al. (2004A&A...421..937G 2004A&A...421..937G,
Cat. J/A+A/421/937)
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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 Cat. II/351
Miszalski et al. Paper II 2011A&A...531A.157M 2011A&A...531A.157M
Gullieuszik et al. Paper III 2012A&A...537A.105G 2012A&A...537A.105G
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/549/29
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
Ripepi et al. Paper XIII 2015MNRAS.446.3034R 2015MNRAS.446.3034R Cat. J/MNRAS/446/3034
Rubele et al. Paper XIV 2015MNRAS.449..639R 2015MNRAS.449..639R Cat. J/MNRAS/449/639
Piatti et al. Paper XV 2015MNRAS.450..552P 2015MNRAS.450..552P
Piatti et al. Paper XVI 2015MNRAS.454..839P 2015MNRAS.454..839P Cat. J/MNRAS/454/839
Cioni et al. Paper XVII 2016A&A...586A..77C 2016A&A...586A..77C
Zhang et al. Paper XVIII 2015ApJ...815...95Z 2015ApJ...815...95Z
Ripepi et al. Paper XIX 2016ApJS..224...21R 2016ApJS..224...21R Cat. J/ApJS/224/21
Moretti et al. Paper XX 2016MNRAS.459.1687M 2016MNRAS.459.1687M Cat. J/MNRAS/459/1687
Piatti et al. Paper XXI 2016MNRAS.460..383P 2016MNRAS.460..383P
Sun et al. Paper XXII 2017ApJ...835..171S 2017ApJ...835..171S
Marconi et al. Paper XXIII 2017MNRAS.466.3206M 2017MNRAS.466.3206M
Subramanian et al. Paper XXIV 2017MNRAS.467.2980S 2017MNRAS.467.2980S
Ripepi et al. Paper XXV 2017MNRAS.472..808R 2017MNRAS.472..808R
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 Cat. J/ApJ/858/31
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
El Youssoufi et al. Paper XXXIV 2019MNRAS.490.1076E 2019MNRAS.490.1076E
Ragosta et al. Paper XXXV 2019MNRAS.490.4975R 2019MNRAS.490.4975R
Zivkov et al., Paper XXXVI 2020MNRAS.494..458Z 2020MNRAS.494..458Z
Groenewegen et al. Paper XXXVII 2020A&A...636A..48G 2020A&A...636A..48G Cat. J/A+A/636/A48
Schmidt et al., Paper XXXVIII 2020A&A...641A.134S 2020A&A...641A.134S
Choudhury et al., Paper XXXIX 2020MNRAS.497.3746C 2020MNRAS.497.3746C
(End) Patricia Vannier [CDS] 22-Nov-2020