M-dwarf stars in the b294 field from the VISTA Variables in the Vía Láctea (VVV)
arXiv:2301.13491 · doi:10.1093/mnras/stad353
Abstract
M-dwarf stars are the dominant stellar population in the MilkyWay and they are important for a wide variety of astrophysical topics. The Gaia mission has delivered a superb collection of data, nevertheless, ground-based photometric surveys are still needed to study faint objects. Therefore, the present work aims to identify and characterise M-dwarf stars in the direction of the Galactic bulge using photometric data and with the help of Virtual Observatory tools. Using parallax measurements and proper motions from Gaia Data Release 3, in addition to different colour-cuts based on VISTA filters, we identify and characterise 7 925 M-dwarf stars in the b294 field from the Vista Variables in the Vía Láctea (VVV) survey. We performed a spectral energy distribution fitting to obtain the effective temperature for all objects using photometric information available at Virtual Observatory archives. The objects in our sample have temperatures varying from 2800 to 3900 K. We also search for periodic signals in VVV light curves with up to 300 epochs, approximately. As a secondary outcome, we obtain periods for 82 M dwarfs by applying two methods: the Lomb-Scargle and Phase Dispersion Minimization methods, independently. These objects, with periods ranging from 0.14 to 34 d, are good candidates for future ground-based follow up. Our sample has increased significantly the number of known M dwarfs in the direction of the Galactic bulge and within 500 pc, showing the importance of ground-based photometric surveys in the near-infrared.
11 pages, 9 figures, accepted for publication in MNRAS
References in corpus (21)
- The Gaia mission
- The UKIRT Infrared Deep Sky Survey (UKIDSS)
- Gaia Early Data Release 3: The astrometric solution
- Gaia Early Data Release 3: Photometric content and validation
- VOSA: Virtual Observatory SED Analyzer. An application to the Collinder 69 open cluster
- Assessing statistical significance of periodogram peaks
- The VST Photometric Halpha Survey of the Southern Galactic Plane and Bulge (VPHAS+)
- Updated Gaia-2MASS 3D maps of Galactic interstellar dust
- CARMENES input catalogue of M dwarfs V. Luminosities, colours, and spectral energy distributions
- The VISTA ZYJHKs Photometric System: Calibration from 2MASS
- Detectability of atmospheric features of Earth-like planets in the habitable zone around M dwarfs
- Mapping the Milky Way bulge at high resolution: the 3D dust extinction, CO, and X factor maps
- Exploring the Local Milky Way: M Dwarfs as Tracers of Galactic Populations
- Mapping the stellar age of the Milky Way bulge with the VVV. III. High resolution reddening map
- Proper motions in the VVV Survey: Results for more than 15 million stars across NGC 6544
- Milky Way Tomography with K and M Dwarf Stars: the Vertical Structure of the Galactic Disk
- New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools: II. SDSS DR7 vs UKIDSS LAS DR6, SDSS DR7 vs UKIDSS LAS DR8, SDSS DR9 vs UKIDSS LAS DR10, and SDSS DR7 vs 2MASS
- Variable star classification across the Galactic bulge and disc with the VISTA Variables in the Vía Láctea survey
- M dwarfs in the b201 tile of the VVV survey: Colour-based Selection, Spectral Types and Light Curves
- The formation of brown dwarfs and low-mass stars by disc fragmentation
- Unveiling short period binaries in the inner VVV bulge