dc.creator |
Ripepi, V. |
|
dc.creator |
Moretti, M. I. |
|
dc.creator |
Marconi, M. |
|
dc.creator |
Clementini, G. |
|
dc.creator |
Cioni, M.-R. L. |
|
dc.creator |
Marquette, J. B. |
|
dc.creator |
Girardi, L. |
|
dc.creator |
Rubele, S. |
|
dc.creator |
Groenewegen, M. A. T. |
|
dc.creator |
de Grijs, R. |
|
dc.creator |
Gibson, Brad K. |
|
dc.date.accessioned |
2018-04-19T16:31:08Z |
|
dc.date.available |
2018-04-19T16:31:08Z |
|
dc.date.issued |
2012-08 |
|
dc.identifier.issn |
0035-8711 |
|
dc.identifier.uri |
http://library2.smu.ca/handle/01/27434 |
|
dc.description |
Publisher's Version/PDF |
|
dc.description.abstract |
The VISTA Magellanic Cloud (VMC; PI: M.-R. L. Cioni) survey is collecting deep K<sub>s</sub>-band time series photometry of the pulsating variable stars hosted by the system formed by the two Magellanic Clouds (MCs) and the bridge connecting them. In this paper, we present the first results for classical Cepheids, from the VMC observations of two fields in the Large Magellanic Cloud (LMC), centred on the South Ecliptic Pole and the 30 Doradus star-forming regions, respectively. The VMC K<sub>s</sub>-band light curves of the Cepheids are well sampled (12 epochs) and of excellent precision (typical errors of ∼0.01 mag). We were able to measure for the first time the K<sub>s</sub> magnitude of the faintest classical Cepheids in the LMC (K<sub>s</sub> ∼ 17.5 mag), which are mostly pulsating in the first overtone (FO) mode, and to obtain FO period–luminosity (PL), period–Wesenheit (PW) and period–luminosity–colour (PLC) relations, spanning the full period range from 0.25 to 6 d. Since the longest period Cepheid in our data set has a variability period of 23 d, we have complemented our sample with literature data for brighter F Cepheids. On this basis, we have built a PL relation in the K<sub>s</sub> band that, for the first time, includes short-period – hence low-luminosity – pulsators, and spans the full range from 1.6 to 100 d in period. We also provide the first ever empirical PW and PLC relations using the (V − K<sub>s</sub>) colour and time series K<sub>s</sub> photometry. The very small dispersion (∼0.07 mag) of these relations makes them very well suited to study the three-dimensional geometry of the Magellanic system. The use of ‘direct’ (parallax- and Baade–Wesselink-based) distance measurements to both Galactic and LMC Cepheids allowed us to calibrate the zero-points of the PL, PW and PLC relations obtained in this paper, and in turn to estimate an absolute distance modulus of (m − M)<sub>0</sub> = 18.46 ± 0.03 mag for the LMC. This result is in agreement with most of the latest literature determinations based on classical Cepheids. |
en_CA |
dc.description.provenance |
Submitted by Betty McEachern (betty.mceachern@smu.ca) on 2018-04-19T16:31:08Z
No. of bitstreams: 1
Gibson_Brad_K_article_2012_j.pdf: 950907 bytes, checksum: 83e2f117e87b5e7b5345cbf5f119d06f (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2018-04-19T16:31:08Z (GMT). No. of bitstreams: 1
Gibson_Brad_K_article_2012_j.pdf: 950907 bytes, checksum: 83e2f117e87b5e7b5345cbf5f119d06f (MD5)
Previous issue date: 2012-08 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
Oxford University Press |
en_CA |
dc.relation.uri |
https://dx.doi.org/10.1111/j.1365-2966.2012.21274.x |
|
dc.rights |
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2012 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
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dc.subject.lcsh |
Cepheids |
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dc.subject.lcsh |
Magellanic Clouds |
|
dc.subject.lcsh |
Astronomy -- Observations |
|
dc.subject.lcsh |
Galaxies |
|
dc.title |
The VMC survey – V. First results for classical Cepheids |
en_CA |
dc.type |
Text |
en_CA |
dcterms.bibliographicCitation |
Monthly Notices of the Royal Astronomical Society 424(3), 1807-1816. (2012) |
en_CA |