Publications (23)
TW Hya Association Membership and New WISE-detected Circumstellar Disks
Adam Schneider, Carl Melis, Inseok Song
We assess the current membership of the nearby, young TW Hydrae Association and examine newly proposed members with the Wide-field Infrared Survey Explorer (WISE) to search for inf…
The VAST Survey -- II. Orbital motion monitoring of A-type star multiples
Robert J. De Rosa, Jenny Patience, Arthur Vigan +11
As a part of our ongoing Volume-limited A-Star (VAST) adaptive optics survey, we have obtained observations of 26 binary systems with projected separations <100 AU, 13 of which hav…
Discovery of 118 New Ultracool Dwarf Candidates Using Machine Learning Techniques
Hunter Brooks, Dan Caselden, J. Davy Kirkpatrick +44
We present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine learning tool, named \texttt{SMDET}, applied to time series images from the Wide-fiel…
The First JWST Spectral Energy Distribution of a Y dwarf
Samuel Beiler, Michael Cushing, Davy Kirkpatrick +3
We present the first JWST spectral energy distribution of a Y dwarf. This spectral energy distribution of the Y0 dwarf WISE J035934.06540154.6 consists of low-resolution (/$…
Measuring and Replicating the 1-20 um Energy Distributions of the Coldest Brown Dwarfs: Rotating, Turbulent and Non-Adiabatic Atmospheres
S. K. Leggett, Pascal Tremblin, Mark W. Phillips +7
Cold, low-mass, field brown dwarfs are important for constraining the terminus of the stellar mass function, and also for optimizing atmospheric studies of exoplanets. In 2020 new…
Automated data processing architecture for the Gemini Planet Imager Exoplanet Survey
Jason Wang, Marshall Perrin, Dmitry Savransky +49
The Gemini Planet Imager Exoplanet Survey (GPIES) is a multi-year direct imaging survey of 600 stars to discover and characterize young Jovian exoplanets and their environments. We…
Young Stars Near Earth: The Octans-Near Association and Castor Moving Group
Ben Zuckerman, Laura Vican, Inseok Song +1
All cataloged stellar moving groups and associations with ages <100 Myr and within 100 pc of Earth have Galactic space motions (UVW) situated in a "good box" with dimensions ~20 km…
The nearby, young, isolated, dusty star HD 166191
Adam Schneider, Inseok Song, Carl Melis +4
We report an in-depth study of the F8-type star HD 166191, identified in an ongoing survey for stars exhibiting infrared emission above their expected photospheres in the Wide-fiel…
The AllWISE Motion Survey and The Quest for Cold Subdwarfs
J. Davy Kirkpatrick, Adam Schneider, Sergio Fajardo-Acosta +23
The AllWISE processing pipeline has measured motions for all objects detected on WISE images taken between 2010 January and 2011 February. In this paper, we discuss new capabilitie…
Discovery of Cold Brown Dwarfs or Free-Floating Giant Planets Close to the Sun
Sandy K. Leggett, Daniel Apai, Adam Burgasser +9
This White Paper describes the opportunities for discovery of Jupiter-mass objects with 300K atmospheres. The discovery and characterization of such cold objects is vital for under…
Stellar Membership and Dusty Debris Disks in the alpha Persei Cluster
B. Zuckerman, Carl Melis, Joseph H. Rhee +2
Because of proximity to the Galactic plane, reliable identification of members of the alpha Persei cluster is often problematic. Based primarily on membership evaluations contained…
Hunting the Coolest Dwarfs: Methods and Early Results
Adam Schneider, Carl Melis, Inseok Song +1
We present the methods and first results of a survey of nearby high proper motion main sequence stars to probe for cool companions with the Gemini camera at Lick Observatory. This…
A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project
John H. Debes, Melina Thevenot, Marc Kuchner +15
Infrared excesses due to dusty disks have been observed orbiting white dwarfs with effective temperatures between 7200 K and 25000 K, suggesting that the rate of tidal disruption o…
Photometric Monitoring of the Coldest Known Brown Dwarf with the Spitzer Space Telescope
Taran Esplin, Kevin Luhman, Michael Cushing +4
Because WISE J085510.83071442.5 (hereafter WISE 0855-0714) is the coldest known brown dwarf ( K) and one of the Sun's closest neighbors (2.2 pc), it offers a unique opp…
The VAST Survey - I. Companions and the unexpected X-ray detection of B6-A7 stars
Robert J. De Rosa, Joanna Bulger, Jenny Patience +8
With an adaptive optics imaging survey of 148 B6-A7 stars, we have tested the hypothesis that unresolved lower-mass companions are the source of the unexpected X-ray detections of…
The Evolution of Dusty Debris Disks Around Solar Type Stars
Laura Vican, Adam Schneider
We used chromospheric activity to determine the ages of 2,820 field stars.. We searched these stars for excess emission at 22 um with the Wide-Field Infrared Survey Explorer. Such…
Brown Dwarfs and Directly Imaged Exoplanets in Young Associations
Jacqueline K. Faherty, Katelyn Allers, Daniella Bardalez Gagliuffi +7
In order to understand the atmospheres as well as the formation mechanism of giant planets formed outside our solar system, the next decade will require an investment in studies of…
Identifying Nearby, Young, Late-type Stars by Means of Their Circumstellar Disks
Adam Schneider, Inseok Song, Carl Melis +2
It has recently been shown that a significant fraction of late-type members of nearby, very young associations (age <10 Myr) display excess emission at mid-IR wavelengths indicativ…
First Resolved Scattered-Light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager
Justin Hom, Jennifer Patience, Thomas M. Esposito +57
We present the first spatially resolved scattered-light images of four debris disks around members of the Scorpius-Centaurus (Sco-Cen) OB Association with high-contrast imaging and…
Discovery of the Y1 Dwarf WISE J064723.23-623235.5
J. Davy Kirkpatrick, Michael C. Cushing, Christopher R. Gelino +5
We present the discovery of a very cold, very low mass, nearby brown dwarf using data from the NASA Wide-field Infrared Survey Explorer (WISE). The object, WISE J064723.23-623235.5…
Herschel Observations of Dusty Debris Disks
Laura Vican, Adam Schneider, Geoff Bryden +4
We present results from two Herschel observing programs using the Photodetector Array Camera and Spectrometer. During three separate campaigns, we obtained Herschel data for 24 sta…
Estimating the Ultraviolet Emission of M dwarfs with Exoplanets from Ca II and H
Katherine Melbourne, Allison Youngblood, Kevin France +29
M dwarf stars are excellent candidates around which to search for exoplanets, including temperate, Earth-sized planets. To evaluate the photochemistry of the planetary atmosphere,…
LRP2020: The Opportunity of Young Nearby Associations with the Advent of the Gaia Mission
Jonathan Gagné, Joel Kastner, Semyeong Oh +12
This white paper proposes leveraging high-quality Gaia data available to the worldwide scientific community and complement it with support from Canadian-related facilities to place…