Search Publications
The PIPER Survey. I. An Initial Look at the Intergalactic Globular Cluster Population in the Perseus Cluster
Wittmann, Carolin; Lisker, Thorsten; Romanowsky, Aaron J. +7 more
We describe the goals and first results of the Program for Imaging of the PERseus cluster of galaxies (PIPER). The first phase of the program builds on imaging of fields obtained with the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS)/WFC and WFC3/UVIS cameras. Our PIPER target fields with HST include major early-type galaxies incl…
The Pan-Pacific Planet Search - VIII. Complete results and the occurrence rate of planets around low-luminosity giants
Butler, R. P.; Wittenmyer, Robert A.; Horner, Jonathan +6 more
Our knowledge of the populations and occurrence rates of planets orbiting evolved intermediate-mass stars lags behind that for solar-type stars by at least a decade. Some radial velocity surveys have targeted these low-luminosity giant stars, providing some insights into the properties of their planetary systems. Here, we present the final data re…
Variations in the Ionospheric Peak Altitude at Mars in Response to Dust Storms: 13 Years of Observations From the Mars Express Radar Sounder
Gurnett, D. A.; Němec, F.; Morgan, D. D. +7 more
Previous observations have shown that, during Martian dust storms, the peak of the ionosphere rises in altitude. Observational studies of this type, however, have been extremely limited. Using 13 years of ionospheric peak altitude data from the Mars Advanced Radar for Subsurface and Ionosphere Sounding instrument on Mars Express, we study how the …
WISEA J083011.95+283716.0: A Missing Link Planetary-mass Object
Wisniewski, John; Kirkpatrick, J. Davy; Burgasser, Adam J. +17 more
We present the discovery of WISEA J083011.95+283716.0, the first Y-dwarf candidate identified through the "Backyard Worlds: Planet 9" citizen science project. We identified this object as a red, fast-moving source with a faint W2 detection in multiepoch AllWISE and unWISE images. We have characterized this object with Spitzer and Hubble Space Tele…
Searching for proto-planets with MUSE
Snellen, I. A. G.; Girard, J.; Brinchmann, J. +5 more
Context. Protoplanetary disks contain structures such as gaps, rings, and spirals, which are thought to be produced by the interaction between the disk and embedded protoplanets. However, only a few planet candidates are found orbiting within protoplanetary disks, and most of them are being challenged as having been confused with disk features.
ALMA CO Observations of Gamma-Ray Supernova Remnant N132D in the Large Magellanic Cloud: Possible Evidence for Shocked Molecular Clouds Illuminated by Cosmic-Ray Protons
Filipović, M. D.; Vink, J.; Rowell, G. +23 more
N132D is the brightest gamma-ray supernova remnant (SNR) in the Large Magellanic Cloud (LMC). We carried out 12CO(J = 1-0, 3-2) observations toward the SNR using the Atacama Large Millimeter/submillimeter Array (ALMA) and Atacama Submillimeter Telescope Experiment. We find diffuse CO emission not only at the southern edge of the SNR as …
An ultra-short period rocky super-Earth orbiting the G2-star HD 80653
Vanderburg, A.; Poretti, E.; Sozzetti, A. +26 more
Ultra-short period (USP) planets are a class of exoplanets with periods shorter than one day. The origin of this sub-population of planets is still unclear, with different formation scenarios highly dependent on the composition of the USP planets. A better understanding of this class of exoplanets will, therefore, require an increase in the sample…
Assessing spectra and thermal inversions due to TiO in hot Jupiter atmospheres
Madhusudhan, Nikku; Gandhi, Siddharth; Masseron, Thomas +3 more
Recent detections of thermal inversions in the dayside atmospheres of some hot Jupiters are motivating new avenues to understand the interplay between their temperature structures and other atmospheric conditions. In particular, TiO has long been proposed to cause thermal inversions in hot Jupiters, depending on other factors such as stellar irrad…
AME: A Cross-scale Constellation of CubeSats to Explore Magnetic Reconnection in the Solar-Terrestrial Relation
Dunlop, Malcolm; Khotyaintsev, Yuri; Phan, Tai +25 more
A major subset of solar-terrestrial relations, responsible in particular for the driver of space weather phenomena, is the interaction between the Earth's magnetosphere and the solar wind. As one of the most important modes of the solar-wind-magnetosphere interaction, magnetic reconnection regulates the energy transport and energy release in the s…
SCExAO/CHARIS High-contrast Imaging of Spirals and Darkening Features in the HD 34700 A Protoplanetary Disk
Currie, Thayne; Kwon, Jungmi; Tamura, Motohide +27 more
We present Subaru/SCExAO+Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) broadband (JHK-band) integral field spectroscopy of HD 34700 A. CHARIS data recover HD 34700 A's disk ring and confirm multiple spirals discovered by Monnier et al. We set limits on substellar companions of ∼12 MJup at 0"3 (in the ring gap) and …