Asteroids' Size Distribution and Colors from HiTS

Abstract

We report the observations of solar system objects during the 2015 campaign of the High cadence Transient Survey (HiTS). We found 5740 bodies (mostly Main Belt asteroids), 1203 of which were detected in different nights and in $g^{\prime }$ and $r^{\prime }$. Objects were linked in the barycenter system and their orbital parameters were computed assuming Keplerian motion. We identified 6 near Earth objects, 1738 Main Belt asteroids and 4 Trans-Neptunian objects. We did not find a $g^{\prime }-r^{\prime }$ color-size correlation for $14<H_{g^{\prime }}<18$ ($1<D<10$ km) asteroids. We show asteroids' colors are disturbed by HiTS' 1.6 hour cadence and estimate that observations should be separated by at most 14 minutes to avoid confusion in future wide-field surveys like LSST. The size distribution for the Main Belt objects can be characterized as a simple power law with slope $\sim 0.9$, steeper than in any other survey, while data from HiTS 2014's campaign is consistent with previous ones (slopes $\sim 0.68$ at the bright end and $\sim 0.34$ at the faint end). This difference is likely due to the ecliptic distribution of the Main Belt since 2015's campaign surveyed farther from the ecliptic than did 2014's and most previous surveys.

17 pages, 18 figures

References in corpus (36)

• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• The Sloan Digital Sky Survey: Technical Summary
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• LSST Science Book, Version 2.0
• Solar System evolution from compositional mapping of the asteroid belt
• Solar System Objects Observed in the SDSS Commissioning Data
• Main Belt Asteroids with WISE/NEOWISE I: Preliminary Albedos and Diameters
• The taxonomic distribution of asteroids from multi-filter all-sky photometric surveys
• The Size Distribution of Trans-Neptunian Bodies
• The Taurus Spitzer Survey: New Candidate Taurus Members Selected Using Sensitive Mid-Infrared Photometry
• The Size Distributions of Asteroid Families in the SDSS Moving Object Catalog 4
• The delay of shock breakout due to circumstellar material seen in most Type II Supernovae
• Orbit Fitting and Uncertainties for Kuiper Belt Objects
• The DECam Plane Survey: Optical photometry of two billion objects in the southern Galactic plane
• Color Systematics of Comets and Related Bodies
• Deep-HiTS: Rotation Invariant Convolutional Neural Network for Transient Detection
• Asteroid lightcurves from the Palomar Transient Factory survey: Rotation periods and phase functions from sparse photometry
• A Subaru Pencil-beam Search for m_R~27 Trans-neptunian bodies
• Ensemble Properties of Comets in the Sloan Digital Sky Survey
• The Colors of Extreme Outer Solar System Objects
• Col-OSSOS: z Band Photometry Reveals Three Distinct TNO Surface Types
• The High Cadence Transient Survey (HiTS) - I. Survey design and supernova shock breakout constraints
• Discovery of distant RR Lyrae stars in the Milky Way using DECam
• The Recognition of Unusual Objects in the Sloan Digital Sky Survey Color System
• Asteroid rotation periods from the Palomar Transient Factory survey
• Serendipitous discovery of RR Lyrae stars in the Leo V ultra-faint galaxy
• Evidence for a colour dependence in the size distribution of main belt asteroids
• The High Cadence Transient Survey (HITS): Compilation and characterization of light-curve catalogs
• Asteroid Distributions in the Ecliptic
• Multi-band Photometry of Trans-Neptunian Objects in the Subaru Hyper Suprime-Cam Survey
• A Search for Subkilometer-sized Ordinary Chondrite Like Asteroids in the Main-Belt
• Asteroids in the High cadence Transient Survey

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• Enabling discovery of solar system objects in large alert data streams
• Exploring the Solar System with the NOIRLab Source Catalog I: Detecting Objects with CANFind
• Colors of Irregular Satellites of Saturn with DECam
• Robotic observation pipeline for small bodies in the solar system based on open-source software and commercially available telescope hardware