Detecting New Visual Binaries in Gaia DR3 with Gaia and 2MASS Photometry I. New Candidate Binaries Within 200 pc of the Sun
arXiv:2310.02256 · doi:10.3847/1538-3881/acffb0
Abstract
We present a method to identify likely visual binaries in Gaia eDR3 that does not rely on parallax or proper motion. This method utilizes the various PSF sizes of 2MASS/Gaia, where at " two stars may be unresolved in 2MASS but resolved by Gaia. Due to this, if close neighbors listed in Gaia are a resolved pair, the associated 2MASS source will have a predictable excess in the J-band that depends on the of the pair. We demonstrate that the expected relationship between 2MASS excess and differs for chance alignments, as compared to true binary systems, when parameters like magnitude and location on the sky are also considered. Using these multidimensional distributions, we compute the likelihood of a close pair of stars to be a chance alignment, resulting in a total(clean) catalog of 68,725(50,230) likely binaries within 200 pc with a completeness rate of () and contamination rate of (). Within this, we find 590 previously unidentified binaries from Gaia eDR3 with projected physical separations AU, where 138 systems were previously identified, and for AU we find that 4 out of 15 new likely binaries have not yet been observed with high-resolution imaging. We also demonstrate the potential of our catalog to determine physical separation distributions and binary fraction estimates, from this increase in low separation binaries. Overall, this catalog provides a good complement for the study of local binary populations by probing smaller physical separations and mass ratios, and provides prime targets for speckle monitoring.
23 pages, 17 figures
References in corpus (25)
- Gaia Early Data Release 3: The astrometric solution
- Gaia Early Data Release 3: Photometric content and validation
- APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
- A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties
- Gaia Early Data Release 3 -- Catalogue validation
- Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
- A catalogue of white dwarfs in Gaia EDR3
- The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition
- The Solar Neighborhood XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc
- The M-dwarfs in Multiples (MinMs) survey - I. Stellar multiplicity among low-mass stars within 15 pc
- The AstraLux Multiplicity Survey: Extension to Late M-dwarfs
- Detecting stars, galaxies, and asteroids with Gaia
- The LuckyCam Survey for Very Low Mass Binaries II: 13 new M4.5-M6.0 Binaries
- The Elusive Majority of Young Moving Groups. I. Young Binaries and Lithium-Rich Stars in the Solar Neighborhood
- Binaries among low-mass stars in nearby young moving groups
- Observations of Binary Stars with the Differential Speckle Survey Instrument. V. Toward an Empirical Metal-Poor Mass-Luminosity Relation
- The Solar Neighborhood XLIX: New Discoveries and Orbits of M Dwarf Multiples with Speckle Interferometry at SOAR
- Observations of Binary Stars with the Differential Speckle Survey Instrument. IX. Observations of Known and Suspected Binaries, and a Partial Survey of Be Stars
- The Solar Neighborhood. XLVI. Revealing New M Dwarf Binaries and their Orbital Architectures
- Observations with the Differential Speckle Survey Instrument. X. Preliminary Orbits of K Dwarf Binaries and Other Stars
- On The Orbital Separation Distribution and Binary Fraction of M Dwarfs
- Large Adaptive Optics Survey for Substellar Objects (LASSO) Around Young, Nearby, Low-mass Stars with Robo-AO
- Bayesian Cross-Matching of High Proper Motion Stars in Gaia DR2 and Photometric Metallicities for 1.7 million K and M Dwarfs
- Updated orbital monitoring and dynamical masses for nearby M-dwarf binaries
- A catalog of nearby accelerating star candidates in Gaia DR3