Zobrazeno 1 - 10
of 760
pro vyhledávání: '"Michael Feast"'
Publikováno v:
MNASSA: Monthly Notes of the Astronomical Society of Southern Africa. Aug2015, Vol. 74 Issue 7/8, p153-155. 3p.
Autor:
Noriyuki Matsunaga, Yoshifusa Ita, Toshihiko Tanabe, Masaki Takayama, Yoshikazu Nakada, John W. Menzies, Takahiro Nagayama, Michael Feast, Patricia A. Whitelock
The goal of this paper is to characterise the light variation properties of Mira variables in the Small Magellanic Cloud. We have investigated a combined optical and near infrared multi-epoch dataset of Mira variables based on our monitoring data obt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f550cafa47c84b33fb4bcf7455b0d3f3
In a shallow near-infrared survey of the dwarf Irregular galaxy, NGC 3109, near the periphery of the Local Group, we have found eight Mira variables, seven of which appear to be oxygen-rich (O-Miras). The periods range from about 430 days to almost 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02b51cd9feb1f264427410d6ac8e8ee4
http://arxiv.org/abs/1812.07796
http://arxiv.org/abs/1812.07796
Autor:
Michael Feast, Shogo Nishiyama, Noriyuki Matsunaga, Laura Inno, Takahiro Nagayama, Yoshiki Matsuoka, Giuseppe Bono, Naoto Kobayashi, Tetsuya Nagata
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 462:414-420
Recent large-scale infrared surveys have been revealing stellar populations in the inner Galaxy seen through strong interstellar extinction in the disk. In particular, classical Cepheids with their period-luminosity and period-age relations are usefu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e654782968b97bc81a42990e230a0d7e
https://doi.org/10.1093/mnras/stw1548
https://doi.org/10.1093/mnras/stw1548
Radial-velocity observations made on more than a thousand nights are presented for the type star of the R Coronae Borealis (RCB) class. There are four principal sources: the Lick Observatory (1950-1953), the original Cambridge radial-velocity spectro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::343c5f2e223c67493bcf75c822ddd076
http://arxiv.org/abs/1810.10823
http://arxiv.org/abs/1810.10823
Autor:
H. Nakaya, Yasushi Nakajima, Daisuke Kato, Patricia A. Whitelock, Yoshifusa Ita, Noriyuki Matsunaga, Takahiro Nagayama, Mikio Kurita, Michael Feast, Yoshikazu Nakada, Toshihiko Tanabe, Tetsuya Nagata, Motohide Tamura, John W. Menzies, Chie Nagashima
Publikováno v:
Monthly Notices of the Royal Astronomical Society.
A very long term near-infrared variable star survey towards the Large and Small Magellanic Clouds was carried out using the 1.4m InfraRed Survey Facility at the South African Astronomical Observatory. This project was initiated in December 2000 in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f5c502405646a6a15f9544acd169516
https://doi.org/10.1093/mnras/sty2539
https://doi.org/10.1093/mnras/sty2539
Autor:
Michael Feast, Patricia A. Whitelock, Hiroki Onozato, Noriyuki Matsunaga, Elias Aydi, John W. Menzies, Sudhanshu Barway
Only one carbon-rich (C-rich, hereinafter) Mira variable has so far been suggested as a member of the Galactic bulge and this is in a symbiotic system. Here we describe a method for selecting C-rich candidates from an infrared colour-colour diagram,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bd318dca5830a9869ac19a8af0861fd
http://arxiv.org/abs/1705.05485
http://arxiv.org/abs/1705.05485
We report and discuss JHKs photometry for Sgr dIG, a very metal-deficient galaxy in the Local Group, obtained over 3.5 years with the Infrared Survey Facility in South Africa. Three large amplitude asymptotic giant branch variables are identified. On
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7840c8d16638abb1b562538ebb2deb6
Autor:
Michael Feast, Patricia A. Whitelock
Publikováno v:
EAS Publications Series. :263-269
Some recent observations of Classical Cepheids, RR Lyrae and Mira variables are used to illustrate their continued importance as standard candles. Gaia will provide a calibration of these stars as distance indicators which should lead to a greatly im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87559dda8ab6d371bf5f5b46992ba739
https://doi.org/10.1051/eas/1567047
https://doi.org/10.1051/eas/1567047
Autor:
Sundar Srinivasan, Martha L. Boyer, Joseph L. Hora, Patricia A. Whitelock, M. Otsuka, B. A. Sargent, Margaret Meixner, Michael Feast, Martin Groenewegen, M. Marengo
Publikováno v:
Proceedings of the International Astronomical Union. 14:498-499
The asymptotic giant branch (AGB) stars with the reddest colors have the largest amounts of circumstellar dust. AGB stars vary in their brightness, and studies show that the reddest AGB stars tend to have longer periods than other AGB stars and are m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1474782fa1f742279fc03a168383882f
https://doi.org/10.1017/s1743921318007068
https://doi.org/10.1017/s1743921318007068