Journal: The Astrophysical Journal

  • Publication
    (596) Scheila in Outburst: A Probable Collision Event in the Main Asteroid Belt

    Images of asteroid (596) Scheila have been acquired at various dates after the discovery of the 2010 outburst. Assuming a short-duration event scenario, as...

  • Publication
    2MASS J17112318-2724315: A Deeply Embedded Low-mass Protostellar System in the B59 Molecular Cloud

    We present near-infrared observations of the low-mass deeply embedded Class 0/I system 2MASS J17112318-2724315 (2M171123) in the B59 molecular cloud. Bright...

  • Publication
    47 Tucanae: The Spectroscopic versus Color-Magnitude Diagram Age Discrepancy

    We investigate current problems in obtaining reliable ages for old stellar systems based on stellar population synthesis modeling of their integrated spectra...

  • Publication
    A 2D Model for Coronal Bright Points: Association with Spicules, UV Bursts, Surges, and EUV Coronal Jets

    Coronal bright points (CBPs) are ubiquitous structures in the solar atmosphere composed of hot small-scale loops observed in extreme-ultraviolet (EUV) or X-rays...

  • Publication
    A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy. V. Variation of the Metallicity Distribution Function along the Sagittarius Stream

    We present reliable measurements of the metallicity distribution function (MDF) at different points along the tidal stream of the Sagittarius (Sgr) dwarf...

  • Publication
    A 4 Gyr M-dwarf Gyrochrone from CFHT/MegaPrime Monitoring of the Open Cluster M67

    We present stellar rotation periods for late K- and early M-dwarf members of the 4 Gyr old open cluster M67 as calibrators for gyrochronology and tests of...

  • Publication
    A Candidate Location for Planet Nine from an Interstellar Meteoroid: The Messenger Hypothesis

    The existence of a hypothetical Planet Nine lurking in the outer solar system has been invoked as a plausible explanation for the anomalous clustering in the...

  • Publication
    A Case against a Significant Detection of Precession in the Galactic Warp

    Recent studies of warp kinematics using Gaia DR2 data have produced detections of warp precession for the first time, which greatly exceeds theoretical...

  • Publication
    A cold massive interstellar cloud within 120 parsecs of the Sun: K I optical and H I radio observations

    We first discovered the presence of a particularly massive cloud in the neighborhood of the Sun, close to the Galactic plane in the direction of Perseus, toward...