TY  - JOUR
A1  - Moretti, M. I.
A1  - Clementini, Gisella
A1  - Marconi, V. Ripepi M.
A1  - Rubele, S.
A1  - Cioni, Maria-Rosa L.
A1  - Muraveva, T.
A1  - Groenewegen, M. A. T.
A1  - Cross, N. J. G.
A1  - Ivanov, V. D.
A1  - Piatti, A. E.
A1  - de Grijs, R.
T1  - The VMC survey - XX. Identification of new Cepheids in the Small Magellanic Cloud
JF  - Monthly notices of the Royal Astronomical Society
N2  - We present K-s-band light curves for 299 Cepheids in the Small Magellanic Cloud (SMC) of which 288 are new discoveries that we have identified using multi-epoch near-infrared photometry obtained by the VISTA survey of the Magellanic Clouds system (VMC). The new Cepheids have periods in the range from 0.34 to 9.1 d and cover the magnitude interval 12.9 <= currency sign < K-s > <= currency sign 17.6 mag. Our method was developed using variable stars previously identified by the optical microlensing survey OGLE. We focus on searching new Cepheids in external regions of the SMC for which complete VMC K-s-band observations are available and no comprehensive identification of different types of variable stars from other surveys exists yet.
KW  - methods: data analysis
KW  - surveys
KW  - stars: variables: Cepheids
KW  - Magellanic Clouds
Y1  - 2016
U6  - https://doi.org/10.1093/mnras/stw716
SN  - 0035-8711
SN  - 1365-2966
VL  - 459
SP  - 1687
EP  - 1697
PB  - Oxford Univ. Press
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Ripepi, V.
A1  - Marconi, M.
A1  - Moretti, M. I.
A1  - Clementini, Gisella
A1  - Cioni, Maria-Rosa L.
A1  - de Grijs, R.
A1  - Emerson, J. P.
A1  - Groenewegen, M. A. T.
A1  - Ivanov, V. D.
A1  - Piatti, A. E.
T1  - THE VMC SURVEY. XIX. CLASSICAL CEPHEIDS IN THE SMALL MAGELLANIC CLOUD
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics ; Supplement series
N2  - The "VISTA near-infrared YJK(s) survey of the Magellanic Clouds System" (VMC) is collecting deep K-s-band time-series photometry of pulsating variable stars hosted by the two Magellanic Clouds and their connecting Bridge. In this paper, we present Y, J, K-s light curves for a sample of 4172 Small Magellanic Cloud (SMC) Classical Cepheids (CCs). These data, complemented with literature V values, allowed us to construct a variety of period-luminosity (PL), period-luminosity-color (PLC), and period-Wesenheit (PW) relationships, which are valid for Fundamental (F), First Overtone (FO), and Second Overtone (SO) pulsators. The relations involving the V, J, K-s bands are in agreement with their counterparts in the literature. As for the Y band, to our knowledge, we present the first CC PL, PW, and PLC relations ever derived using this filter. We also present the first near-infrared PL, PW, and PLC relations for SO pulsators to date. We used PW(V, K-s) to estimate the relative SMC-LMC distance and, in turn, the absolute distance to the SMC. For the former quantity, we find a value of Delta mu = 0.55. +/- 0.04 mag, which is in rather good agreement with other evaluations based on CCs, but significantly larger than the results obtained from older population II distance indicators. This discrepancy might be due to the different geometric distributions of young and old tracers in both Clouds. As for the absolute distance to the SMC, our best estimates are mu(SMC) = 19.01 +/- 0.05 mag and mu(SMC) = 19.04 +/- 0.06 mag, based on two distance measurements to the LMC which rely on accurate CC and eclipsing Cepheid binary data, respectively.
KW  - distance scale
KW  - Magellanic Clouds
KW  - stars: oscillations
KW  - stars: variables: Cepheids
Y1  - 2016
U6  - https://doi.org/10.3847/0067-0049/224/2/21
SN  - 0067-0049
SN  - 1538-4365
VL  - 224
SP  - 199
EP  - 229
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -