Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Wenlong Yuan"'
The accuracy of the Hubble constant measured with extragalactic Cepheids depends on robust photometry and background estimation in the presence of stellar crowding. The conventional approach accounts for crowding by sampling backgrounds near Cepheids
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4b4dff3785004692a3def769bc384ec
http://arxiv.org/abs/2005.02445
http://arxiv.org/abs/2005.02445
Autor:
Lucas M. Macri, S. L. Hoffmann, Alexei V. Filippenko, Daniel Scolnic, Patricia A. Whitelock, Nadia L. Zakamska, Adam G. Riess, Stefano Casertano, Wenlong Yuan, Caroline Huang
Publikováno v:
The Astrophysical Journal. 889:5
We present year-long, near-infrared Hubble Space Telescope WFC3 observations used to search for Mira variables in NGC 1559, the host galaxy of the Type Ia supernova (SN Ia) 2005df. This is the first dedicated search for Miras, highly-evolved low-mass
We analyze sparsely-sampled near-infrared (JHKs) light curves of a sample of 1781 Mira variable candidates in M33, originally discovered using I-band time-series observations. We extend our single-band semi-parametric Gaussian process modeling of Mir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd180013091348332e6dfed3bfbda4a4
http://arxiv.org/abs/1807.03544
http://arxiv.org/abs/1807.03544
Autor:
Wenlong Yuan, Lucas M. Macri, Shashi M. Kanbur, Jianhua Z. Huang, Shiyuan He, Chow-Choong Ngeow
Publikováno v:
NASA Astrophysics Data System
We study the near-infrared properties of 690 Mira candidates in the central region of the Large Magellanic Cloud, based on time-series observations at JHKs. We use densely-sampled I-band observations from the OGLE project to generate template light c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb3e3363e8931d5d0a1c8a03a9f03b79
We develop a non-linear semi-parametric Gaussian process model to estimate periods of Miras with sparsely-sampled light curves. The model uses a sinusoidal basis for the periodic variation and a Gaussian process for the stochastic changes. We use max
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d157dd8193b167cbeba0978007208569
http://arxiv.org/abs/1609.06680
http://arxiv.org/abs/1609.06680
Publikováno v:
The Astronomical Journal. 153:170
We present the discovery of 1847 Mira candidates in the Local Group galaxy M33 using a novel semi-parametric periodogram technique coupled with a Random Forest classifier. The algorithms were applied to ~2.4x10^5 I-band light curves previously obtain