Predicting Stellar Angular Sizes

Abstract

Reliable prediction of stellar diameters, particularly angular diameters, is a useful and necessary tool for the increasing number of milliarcsecond resolution studies being carried out in the astronomical community. A new and accurate technique of predicting angular sizes is presented for main sequence stars, giant and supergiant stars, and for more evolved sources such as carbon stars and Mira variables. This technique uses observed $K$ and either $V$ or $B$ broad-band photometry to predict V=0 or B=0 zero magnitude angular sizes, which are then readily scaled to the apparent angular sizes with the $V$ or $B$ photometry. The spread in the relationship is 2.2% for main sequence stars; for giant and supergiant stars, 11-12%; and for evolved sources, results are at the 20-26% level. Compared to other simple predictions of angular size, such as linear radius-distance methods or black-body estimates, zero magnitude angular size predictions can provide apparent angular sizes with errors that are 2 to 5 times smaller.

28 pages, 4 figures, accepted by PASP

Cited by in corpus (106)

• The angular size of dwarf stars and subgiants - Surface brightness relations calibrated by interferometry
• OGLE-2003-BLG-262: Finite-Source Effects from a Point-Mass Lens
• OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event
• Interferometric Observations of Rapidly Rotating Stars
• Fundamental Properties of Stars using Asteroseismology from Kepler & CoRoT and Interferometry from the CHARA Array
• Stellar Diameters and Temperatures III. Main Sequence A, F, G, & K Stars: Additional high-precision measurements and empirical relations
• Spatially Resolved Circumstellar Structure of Herbig Ae/Be Stars in the Near-Infrared
• First microlens mass measurement: PLANET photometry of EROS BLG-2000-5
• Detection of Rotation in a Binary Microlens: PLANET Photometry of MACHO 97-BLG-41
• Eclipsing binaries as standard candles: HD 23642 and the distance to the Pleiades
• SearchCal: a Virtual Observatory tool for searching calibrators in optical long baseline interferometry. I: The bright object case
• Stellar Diameters and Temperatures IV. Predicting Stellar Angular Diameters
• Identification of the OGLE-2003-BLG-235/MOA-2003-BLG-53 Planetary Host Star
• Few Skewed Disks Found in First Closure-Phase Survey of Herbig Ae/Be stars
• Microlensing Constraints on the Frequency of Jupiter-Mass Companions: Analysis of Five Years of PLANET Photometry
• Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey II: Free-Floating Planet Detection Rates
• The Araucaria Project. Determination of the LMC Distance from Late-Type Eclipsing Binary Systems: I. OGLE-051019.64-685812.3
• PLANET observations of microlensing event OGLE-1999-BUL-23: limb darkening measurement of the source star
• First Surface-resolved Results with the IOTA Imaging Interferometer: Detection of Asymmetries in AGB stars
• New insights into the dust formation of oxygen-rich AGB stars
• OGLE-2003-BLG-238: Microlensing Mass Estimate of an Isolated Star
• Predicting Stellar Angular Diameters from $V$, $I_C$, $H$, $K$ Photometry
• A Short Timescale Candidate Microlensing Event in the POINT-AGAPE Pixel Lensing Survey of M31
• MOA 2003-BLG-37: A Bulge Jerk-Parallax Microlens Degeneracy
• The Anomaly in the Candidate Microlensing Event PA-99-N2
• Multi-wavelength Diameters of Nearby Miras and Semiregulars
• The Palomar Testbed Interferometer Calibrator Catalog
• Gaia FGK Benchmark Stars: New Candidates At Low-Metallicities
• Dust Scattering in Miras R Car and RR Sco resolved by optical interferometric polarimetry
• Constraining Disk Parameters of Be Stars using Narrowband H-alpha Interferometry with the NPOI
• Microlensing Characterization of Wide-Separation Planets
• Transit Target Selection Using Reduced Proper Motions
• SORA: Stellar Occultation Reduction and Analysis
• Gravitational Microlensing: A Tool for Detecting and Characterizing Free-Floating Planets
• Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape and topographic features
• Establishing Visible Interferometer System Responses: Resolved and Unresolved Calibrators
• Detecting Transits of Planetary Companions to Giant Stars
• Optical Gravitational Lensing Experiment. OGLE 2000-BUL-43: A Spectacular Ongoing Parallax Microlensing Event. Difference Image Analysis
• Limits on Stellar and Planetary Companions in Microlensing Event OGLE-1998-BUL-14
• The structure of Chariklo's rings from stellar occultations
• M31 pixel lensing event OAB-N2: a study of the lens proper motion
• Sensitivity of Transit Searches to Habitable Planets
• Results from the 2014 November 15th multi-chord stellar occultation by the TNO (229762) 2007 UK${}_{126}$
• Applications of Microlensing to Stellar Astrophysics
• The Many Possible Interpretations of Microlensing Event OGLE-2002-BLG-055
• Diameters of Mira Stars Measured Simultenously in the J,H,K' Near-Infrared Bands
• Microlensing by Stellar Black Holes Around Sgr A*
• The TAOS Project: Upper Bounds on the Population of Small KBOs and Tests of Models of Formation and Evolution of the Outer Solar System
• Detached binaries in the Large Magellanic Cloud. A selection of binaries suitable for distance determination
• Occultation Searches for Kuiper Belt Objects
• Results from a triple chord stellar occultation and far-infrared photometry of the trans-Neptunian object (229762) 2007 UK126
• Microlens Mass Measurement using Triple-Peak Events
• A multi-chord stellar occultation by the large trans-Neptunian object (174567) Varda
• The PTI Carbon Star Angular Size Survey: Effective Temperatures and Non-Sphericity
• Characterization of material around the centaur (2060) Chiron from a visible and near-infrared stellar occultation in 2011
• A stellar occultation by Vanth, a satellite of (90482) Orcus
• The surface brightness - colour relations based on eclipsing binary stars and calibrated with Gaia EDR3
• Astrometric Resolution of Severely Degenerate Binary Microlensing Events
• Detection of Extrasolar Planets by Gravitational Microlensing
• Searching for sub-kilometer TNOs using Pan-STARRS video mode lightcurves: Preliminary study and evaluation using engineering data
• The large Trans-Neptunian Object 2002 TC${}_{302}$ from combined stellar occultation, photometry and astrometry data
• Hubble Space Telescope Constraints on the Winds and Astrospheres of Red Giant Stars
• Kuiper Belt Object Sizes and Distances from Occultation Observations
• Constraints on (2060) Chiron's size, shape, and surrounding material from the November 2018 and September 2019 stellar occultations
• Constraints on the structure and seasonal variations of Triton's atmosphere from the 5 October 2017 stellar occultation and previous observations
• Stellar occultations by Trans-Neptunian Objects
• Precise calibration of the dependence of surface brightness-colour relations on colour and class for late-type stars
• Physical properties of the trans-Neptunian object (38628) Huya from a multi-chord stellar occultation
• Modelling the atmosphere of the carbon-rich Mira RU Vir
• Microlens Parallaxes of Binary Lenses Measured from a Satellite
• Occultation Evidence for a Satellite of the Trojan Asteroid (911) Agamemnon
• High spectral resolution spectroscopy of the SiO fundamental lines in red giants and red supergiants with VLT/VISIR
• The trans-Neptunian object (84922) 2003 VS2 through stellar occultations
• Direct Measurements of Giant Star Effective Temperatures and Linear Radii: Calibration Against Spectral Types and V-K Color
• HARPS-N high spectral resolution observations of Cepheids II. The impact of the surface-brightness color relation on the Baade-Wesselink projection factor of eta Aql
• Angular diameter estimation of interferometric calibrators - Example of lambda Gruis, calibrator for VLTI-AMBER
• An empirical method to estimate the LMC distance using B-stars in eclipsing binary systems
• The multichord stellar occultation on 2019 October 22 by the trans-Neptunian object (84922) 2003 VS${}_2$
• Material Around the Centaur (2060) Chiron from the 2018 November 28 UT Stellar Occultation
• Theoretical analysis of surface brightness-colour relations for late-type stars using MARCS model atmospheres
• Angular diameter measurements of evolved variables by lunar occultations at 2.2 and 3.8 micron
• Removing the Microlensing Blending-Parallax Degeneracy Using Source Variability
• Spectroscopic and Interferometric Measurements of Nine K Giant Stars
• The first observed stellar occultations by the irregular satellite (Saturn IX) Phoebe and improved rotational period
• Finite source effect on the polarization degree induced by a single microlens
• First L-band Interferometric Observations of a Young Stellar Object: Probing the Circumstellar Environment of MWC 419
• The 2017 May 20${}^{\mathrm{th}}$ stellar occultation by the elongated centaur (95626) 2002 GZ${}_{32}$
• Surface brightness-colour relations of dwarf stars from detached eclipsing binaries -- I. Calibrating sample
• Further milliarcsecond resolution results on cool giants and binary stars from lunar occultations at Devashtal
• The OGLE-II event sc5_2859 -- An example of disk-disk microlensing
• The Angular Diameter of $\lambda$ Boötis}
• The trans-Neptunian object (119951) 2002 KX14 revealed via multiple stellar occultations
• The multichord stellar occultation by the centaur Bienor on January 11, 2019
• Kilometer-precise (UII) Umbriel physical properties from the multichord stellar occultation on 2020 September 21
• A study of centaur (54598) Bienor from multiple stellar occultations and rotational light curves
• An Empirical Procedure to Estimate Distances to Stellar Clusters
• Near Infrared Angular Diameters of a few AGB variables by Lunar Occultations
• Multi-spectral Observations of Lunar Occultations: I. Resolving The Dust Shell Around AFGL 5440
• Search for Small Trans-Neptunian Objects by the TAOS Project
• Surface brightness-color relations for red giant branch stars using asteroseismic radii and Gaia distances (the ARD method)
• Constraining the size, shape, and albedo of the large Trans-Neptunian Object (28978) Ixion with multi-chord stellar occultations
• Selection of the SIM Astrometric Grid
• Size and shape of the trans-Neptunian object (470316) 2007 OC10: Comparison with thermal data
• Angular Radii of Stars via Microlensing
• Changes in Pluto's Atmosphere Based on Stellar Occultation Data from 2017 to 2023
• MOA-2020-BLG-135Lb: A New Neptune-class Planet for the Extended MOA-II Exoplanet Microlens Statistical Analysis