Search Publications
Dynamical Mass of the Young Brown Dwarf Companion PZ Tel B
Bowler, Brendan P.; Franson, Kyle
Dynamical masses of giant planets and brown dwarfs are critical tools for empirically validating substellar evolutionary models and their underlying assumptions. We present a measurement of the dynamical mass and an updated orbit of PZ Tel B, a young brown dwarf companion orbiting a late-G member of the β Pic moving group. PZ Tel A exhibits an ast…
CLEAR: Spatially Resolved Emission Lines and Active Galactic Nuclei at 0.6 < z < 1.3
Papovich, Casey; Cleri, Nikko J.; Holwerda, Benne W. +8 more
We investigate spatially resolved emission-line ratios in a sample of 219 galaxies (0.6 < z < 1.3) detected using the G102 grism on the Hubble Space Telescope Wide Field Camera 3 taken as part of the CANDELS Lyα Emission at Reionization survey to measure ionization profiles and search for low-luminosity active galactic nuclei (AGN). We analy…
Discovery of A Large-scale Bent Radio Jet in the Merging Cluster A514
Kale, Ruta; Lee, Wonki; ZuHone, John +3 more
We report a discovery of a large-scale bent radio jet in the merging galaxy cluster A514 (z = 0.071). The radio emission originates from the two radio lobes of the active galactic nucleus (AGN) located near the center of the southern subcluster and extends toward the southern outskirts with multiple bends. Its peculiar morphology is characterized …
FU Orionis disk outburst: Evidence for a gravitational instability scenario triggered in a magnetically dead zone
Labadie, L.; Lesur, G.; Monnier, J. D. +10 more
Context. FUors outbursts are a crucial stage of accretion in young stars. However, a complete mechanism at the origin of the outburst still remains missing.
Aims: We aim to constrain the instability mechanism in the star FU Orionis itself by directly probing the size and evolution in time of the outburst region with near-infrared (NIR) interf…
Another look at the dayside spectra of WASP-43b and HD 209458b: Are there scattering clouds?
Parmentier, Vivien; Taylor, Jake
The search for clouds on the dayside of hot Jupiters has been disadvantaged due to the limited number of high quality space-based observations of their dayside. To date, retrieval studies have found no evidence for grey clouds on the dayside, however none of these studies explored the impact of scattering clouds. In this study we reanalyse the day…
Assessing the physical reality of Milky Way open cluster candidates
Piatti, Andrés E.; Illesca, Denis M. F.; Massara, Agustina A. +4 more
We report results on the analysis of 11 new Milky Way open cluster candidates, recently discovered from the detection of stellar overdensities in the Vector Point diagram, by employing Xtreme deconvolution Gaussian mixture models. We treated these objects as real open clusters and derived their fundamental properties with their associated intrinsi…
HST viewing of spectacular star-forming trails behind ESO 137-001
Donahue, Megan; Voit, G. Mark; Fossati, Matteo +8 more
We present the results from the HST WFC3 and ACS data on an archetypal galaxy undergoing ram pressure stripping (RPS), ESO 137-001, in the nearby cluster Abell 3627. ESO 137-001 is known to host a prominent stripped tail detected in many bands from X-rays, H α to CO. The HST data reveal significant features indicative of RPS such as asymmetric dus…
Macrospicules and Their Connection to Magnetic Reconnection in the Lower Solar Atmosphere
Shen, Yuandeng; Zhou, Xinping; Duan, Yadan +4 more
Solar macrospicules are beam-like cool plasma ejections of size in between spicules and coronal jets, which can elucidate potential connections between plasma jetting activity at different scales. With high-resolution observations from the New Vacuum Solar Telescope and Solar Dynamics Observatory, we investigate the origin of five groups of recurr…
The Close AGN Reference Survey (CARS). A parsec-scale multi-phase outflow in the super-Eddington NLS1 Mrk 1044
Jahnke, K.; Gaspari, M.; Combes, F. +8 more
Context. The interaction between active galactic nuclei (AGNs) and their host galaxies is scarcely resolved. Narrow-line Seyfert 1 (NLS1) galaxies are believed to represent AGN at early stages of their evolution and to allow one to observe feeding and feedback processes at high black hole accretion rates.
Aims: We aim to constrain the propert…
Evolution of Neptune at near-infrared wavelengths from 1994 through 2022
de Pater, Imke; Wong, Michael H.; Hueso, Ricardo +16 more
Using archival near-infrared observations from the Keck and Lick Observatories and the Hubble Space Telescope, we document the evolution of Neptune's cloud activity from 1994 to 2022. We calculate the fraction of Neptune's disk that contained clouds, as well as the average brightness of both cloud features and cloud-free background over the planet…