The OGLE Collection of Variable Stars. Nearly 66,000 Mira stars in the Milky Way

Abstract

We present a collection of 65,981 Mira-type variable stars found in the Optical Gravitational Lensing Experiment (OGLE) project database. Two-thirds of our sample (40,356 objects) are located in the Galactic bulge fields, whereas 25,625 stars are in the Galactic disk. The vast majority of the collection (47,532 objects) are new discoveries. We provide basic observational parameters of the Mira variables: equatorial coordinates, pulsation periods, $I$-band and $V$-band mean magnitudes, $I$-band brightness amplitudes, and identifications in other catalogs of variable stars. We also provide the $I$-band and $V$-band time-series photometry collected since 1997 during the OGLE-II, OGLE-III, and OGLE-IV phases. The classical selection process, i.e., mostly based on the visual inspection of light curves by experienced astronomers, led us to the high purity of the catalog. As a result, this collection can be used as a training set in the machine learning classification algorithms. Using overlapping parts of adjacent OGLE fields, we estimate the completeness of the catalog to be about 96%. We compare and discuss the statistical features of Miras located in different regions of the Milky Way. We show examples of stars that change their type over time, from a semi-regular variable to Mira and vice versa. This dataset is perfectly suited to study the three-dimensional structure of the Milky Way, and it may help to explain the puzzle of the X-shaped bulge.

Accepted for publication in The Astrophysical Journal Supplement Series. 18 pages, 8 figures, 3 tables. The OGLE Collection of Miras in the Milky Way is publicly available through http://www.astrouw.edu.pl/ogle/ogle4/OCVS/blg/lpv/ for Miras located in the Galactic bulge fields, and http://www.astrouw.edu.pl/ogle/ogle4/OCVS/gd/lpv/ for Miras located in the Galactic disk fields

References in corpus (24)

• The Gaia mission
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• The Catalina Surveys Periodic Variable Star Catalog
• The Zwicky Transient Facility Catalog of Periodic Variable Stars
• Near-Infrared Photometry of Carbon Stars
• An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids
• Age Demographics of the Milky Way Disk and Bulge
• Binarity as the Origin of Long Secondary Periods in Red Giant Stars
• The M33 Synoptic Stellar Survey. II. Mira Variables
• Absence of an X-shaped Structure in the Milky Way Bulge Using Mira Variable Stars
• Multiwavelength properties of Miras
• Interplay between pulsation, mass loss, and third dredge-up: More about Miras with and without technetium
• The period-age relation of long-period variables
• Mira Variable Stars From LAMOST DR4 Data: Emission Features, Temperature Types, and Candidate Selection
• Asteroseismology of luminous red giants with Kepler. II. Dependence of mass loss on pulsations and radiation
• $12660$ spotted stars toward the OGLE Galactic bulge fields
• A Remarkable Oxygen-rich Asymptotic Giant Branch Variable in the Sagittarius Dwarf Irregular Galaxy
• Luminous AGB variables in the dwarf Irregular Galaxy, NGC 3109
• Trigonometric Distance and Proper Motion of IRAS 20056+3350: Massive Star Forming Region on the Solar Circle
• Stellar Pulsation and the Production of Dust and Molecules in Galactic Carbon Stars
• The small boxy/peanut structure of the Milky Way traced by old stars
• Distribution of red clump stars does not support the X-shaped Galactic bulge
• Mira Ceti, atypical archetype
• Difference of photometric properties between regular and non-regular Miras in the Magellanic Clouds

Cited by in corpus (4)

• Gaia Data Release 3: The second Gaia catalogue of Long-Period Variable candidates
• A three-dimensional map of the Milky Way using 66,000 Mira variable stars
• Age-morphology dependence of the Milky Way boxy/peanut bulge seen in Mira variables
• A New Period Determination Method for Periodic Variable Stars