English
Related papers

Related papers: The M33 Synoptic Stellar Survey. II. Mira Variable…

200 papers

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…

Solar and Stellar Astrophysics · Physics 2018-08-29 Wenlong Yuan , Lucas M. Macri , Atefeh Javadi , Zhenfeng Lin , Jianhua Z. Huang

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…

Solar and Stellar Astrophysics · Physics 2017-09-27 Wenlong Yuan , Lucas M. Macri , Shiyuan He , Jianhua Z. Huang , Shashi M. Kanbur , Chow-Choong Ngeow

We present the results of a search for Miras and long-period variables (LPVs) in M33 using griJHKs archival observations from the Canada-France-Hawai'i Telescope. We use multiband information and machine learning techniques to identify and…

Astrophysics of Galaxies · Physics 2024-05-02 Tarini Konchady , Lucas Macri , Xiaomeng Yan , Jianhua Huang

We present the mid-infrared (mid-IR) period$-$luminosity relations (PLRs) using over 1000 Mira variables in the Large Magellanic Cloud (LMC), for the four Wide-Field Infrared Survey Explorer (WISE) and the four Spitzer bands. These PLRs…

Solar and Stellar Astrophysics · Physics 2021-10-04 Patryk Iwanek , Igor Soszyński , Szymon Kozłowski

We use the OGLE-II and OGLE-III data in conjunction with the 2MASS near-infrared (NIR) photometry to identify and study Miras and Semiregular Variables (SRVs) in the Large Magellanic Cloud. We found in total 3221 variables of both types,…

Mira variables are asymptotic giant branch pulsating stars with long pulsation periods and large amplitudes in optical bands. By applying the random forest algorithm to the I-band light curves for the Miras in the Magellanic Clouds, we have…

Solar and Stellar Astrophysics · Physics 2022-04-13 Jia-Yu Ou , Chow-Choong Ngeow

We present a systematic analysis to determine and improve the pulsation periods of 1637 known long-period Mira variables in M33 using $gri$-band light curves spanning $\sim18$~years from several surveys, including M33 variability survey,…

Solar and Stellar Astrophysics · Physics 2023-03-08 Jia-Yu Ou , Chow-Choong Ngeow , Anupam Bhardwaj , Matthew J. Graham , Russ R. Laher , Frank J. Masci , Reed Riddle

We present Period-Luminosity and Period-Luminosity-Color relations at maximum-light for Mira variables in the Magellanic Clouds using time-series data from the Optical Gravitational Lensing Experiment (OGLE-III) and {\it Gaia} data release…

The Period--Luminosity relation (PLR) of Mira variable stars is an important tool to determine astronomical distances. The common approach of estimating the PLR is a two-step procedure that first estimates the Mira periods and then runs a…

Applications · Statistics 2022-12-14 Shiyuan He , Zhenfeng Lin , Wenlong Yuan , Lucas M. Macri , Jianhua Z. Huang

Mira variables are useful distance indicators, due to their high luminosities and well-defined period-luminosity relation. We select 1863 Miras from SAAO and MACHO observations to examine their use as distance estimators in the Milky Way.…

Solar and Stellar Astrophysics · Physics 2018-09-24 Wenzer Qin , David M. Nataf , Nadia Zakamska , Peter R. Wood , Luca Casagrande

Published data for large amplitude asymptotic giant branch variables in the Large Magellanic Cloud are re-analysed to establish the constants for an infrared (K) period-luminosity relation of the form: Mk=rho[log P-2.38] + delta. A slope of…

Astrophysics · Physics 2014-11-18 Patricia A. Whitelock , Michael W. Feast , Floor van Leeuwen

Approximately four thousand light curves of red variable stars in the LMC were selected from the 2.3-years duration MOA database by a period analysis using the Phase Dispersion Minimization method. Their optical features (amplitudes,…

Astrophysics · Physics 2016-01-27 Sachiyo Noda , Mine Takeuti

We investigate the infrared variability of carbon stars in the Large Magellanic Cloud (LMC). Our sample consists of 11,134 carbon stars identified in both visual and infrared bands. Among these, 1,184 objects are known Mira variables based…

Solar and Stellar Astrophysics · Physics 2025-06-30 Kyung-Won Suh

We present period-luminosity diagrams for nearby Miras and semiregulars, selecting stars with parallaxes better than 20 per cent and well-determined periods. Using K-band magnitudes, we find two well-defined P-L sequences, one corresponding…

Astrophysics · Physics 2026-02-19 T. R. Bedding , A. A. Zijlstra

We comprehensively study the variability of Miras in the Large Magellanic Cloud (LMC) by simultaneous analysing light curves in 14 bands in the range of 0.5$-$24 microns. We model over 20-years-long, high cadence $I$-band light curves…

One hundred and forty six long-period red variable stars in the Large Magellanic Cloud (LMC) from the three year MOA project database were analysed. A careful periodic analysis was performed on these stars and a catalogue of their…

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…

We present results from an analysis of $\sim$ 29,000 RR Lyrae stars located in the Large Magellanic Cloud (LMC). For these objects, near-infrared time-series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and optical…

The long secondary period (LSP) phenomenon, which is commonly observed in pulsating red giants, has not been detected in any Mira yet. The goal of this paper is to verify, if there is a physical reason for this or if it is simply an…

Solar and Stellar Astrophysics · Physics 2023-01-11 Michal Pawlak

Semi-regular variables (SRVs) are similar to Miras in brightness, and they also follow PLRs, though not necessarily the same as Miras. As potential standard candles they are more challenging than Miras due to their smaller variability…

Solar and Stellar Astrophysics · Physics 2021-12-08 Michele Trabucchi , Nami Mowlavi , Thomas Lebzelter
‹ Prev 1 2 3 10 Next ›