Search Publications
TOI 560: Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS, and HIRES RVs
Deming, Drake; Gorjian, Varoujan; Hellier, Coel +93 more
We validate the presence of a two-planet system orbiting the 0.15-1.4 Gyr K4 dwarf TOI 560 (HD 73583). The system consists of an inner moderately eccentric transiting mini-Neptune (TOI 560 b, $P={6.3980661}_{-0.0000097}^{+0.0000095}$ days, $e={0.294}_{-0.062}^{+0.13}$ , $M={0.94}_{-0.23}^{+0.31}{M}_{\mathrm{Nep}}$ ) initially discovered in the Sec…
A Catalog of Distance Determinations for the LAMOST DR8 K Giants in the Galactic Halo
Zhao, Gang; Rix, Hans-Walter; Yang, Chengqun +4 more
We present a catalog of distances for 19,544 K giants drawn from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR8. Most of them are located in the halo of the Milky Way up to ~120 kpc. There are 15% K giants without Sloan Digital Sky Survey (SDSS) photometry, for which we supplements with Pan-STARRS1 (PS1) photometry calibrat…
Disintegration of Long-period Comet C/2021 A1 (Leonard)
Mutchler, Max; Jewitt, David; Agarwal, Jessica +3 more
We present imaging observations of the disintegrating long-period comet C/2021 A1 (Leonard). High-resolution observations with the Hubble Space Telescope show no evidence for surviving fragments, and place a 3σ upper limit on their possible radius of ~60 m (albedo 0.1 assumed). In contrast, wide-field observations from the Swan Hill Observatory, A…
Revisiting Orbital Evolution in HAT-P-2 b and Confirmation of HAT-P-2 c
Fulton, Benjamin J.; Howard, Andrew W.; Winn, Joshua N. +5 more
One possible formation mechanism for Hot Jupiters is that high-eccentricity gas giants experience tidal interactions with their host star that cause them to lose orbital energy and migrate inwards. We study these types of tidal interactions in an eccentric Hot Jupiter called HAT-P-2 b, which is a system where a long-period companion has been sugge…
Three Ultra-short-period Contact Eclipsing Binary Systems Mined from Massive Astronomical Surveys
Ferreira Lopes, C. E.; Drake, Andrew J.; Catelan, Márcio +3 more
We present the photometric analysis of three ultra-short-period total eclipsing binaries in contact configuration, CRTS_J172718.0+431624, OGLE-BLG-ECL-000104, and OGLE-BLG-ECL-000012, mined from massive astronomical surveys. Using the available archival light curves (LCs) from Vista Variables in the Vía Láctea (VVV), Optical Gravitational Lensing …
Revisiting the Red Giant Branch Hosts KOI-3886 and ι Draconis. Detailed Asteroseismic Modeling and Consolidated Stellar Parameters
Chaplin, William J.; Kane, Stephen R.; Huber, Daniel +23 more
Asteroseismology is playing an increasingly important role in the characterization of red giant host stars and their planetary systems. Here, we conduct detailed asteroseismic modeling of the evolved red giant branch (RGB) hosts KOI-3886 and ι Draconis, making use of end-of-mission Kepler (KOI-3886) and multisector TESS (ι Draconis) time-series ph…
The Galactic Interstellar Object Population: A Framework for Prediction and Inference
Bannister, Michele T.; Mackereth, J. Ted; Forbes, John C. +2 more
The Milky Way is thought to host a huge population of interstellar objects (ISOs), numbering approximately 1015 pc-3 around the Sun, which are formed and shaped by a diverse set of processes ranging from planet formation to Galactic dynamics. We define a novel framework, first to predict the properties of this Galactic ISO po…
Verification of Gaia Data Release 3 Single-lined Spectroscopic Binary Solutions With Three Transiting Low-mass Secondaries
Bieryla, Allyson; Latham, David W.; Quinn, Samuel N. +18 more
While secondary mass inferences based on single-lined spectroscopic binary (SB1) solutions are subject to $\sin i$ degeneracies, this degeneracy can be lifted through the observations of eclipses. We combine the subset of Gaia Data Release 3 SB1 solutions consistent with brown dwarf-mass secondaries with the Transiting Exoplanet Survey Satellite (…
Hiding Dust around ϵ Eridani
Gáspár, András; Wolff, Schuyler Grace; Ygouf, Marie +2 more
With a Jupiter-like exoplanet and a debris disk with both asteroid and Kuiper Belt analogs, ϵ Eridani has a fascinating resemblance to our expectations for a young solar system. We present a deep Hubble Space Telescope/Space Telescope Imaging Spectrograph coronographic data set using eight orbit visits and the point-spread function calibrator δ Er…
The Spitzer Coverage of HSC-Deep with IRAC for Z studies (SHIRAZ). I. IRAC Mosaics
Ono, Yoshiaki; Ouchi, Masami; Sawicki, Marcin +18 more
We present new Spitzer Infrared Array Camera (IRAC) 3.6 and 4.5 µm mosaics of three fields, E-COSMOS, DEEP2-F3, and ELAIS-N1. Our mosaics include both new IRAC observations as well as reprocessed archival data in these fields. These fields are part of the HSC-Deep grizy survey and have a wealth of additional ancillary data. The addition of t…