Search Publications
Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-infrared
Marley, Mark; Meyer, Michael R.; Quanz, Sascha P. +7 more
We present model constraints on the atmospheric structure of HD 106906 b, a planetary-mass companion orbiting at a ~700 au projected separation around a 15 Myr old stellar binary, using the APOLLO retrieval code on spectral data spanning 1.1-2.5 µm. C/O ratios can provide evidence for companion formation pathways, as such pathways are ambigu…
Kinetic Features of Alpha Particles in a Pestchek-like Magnetic Reconnection Event in the Solar Wind Observed by Solar Orbiter
Verscharen, Daniel; He, Jiansen; Fedorov, Andrey +10 more
The acceleration and heating of solar wind particles by magnetic reconnection are important mechanisms in space physics. Although alpha particles (4He2+) are the second most abundant population of solar wind ions, their kinetic behavior in solar wind magnetic reconnection is not well understood. Using the high-energy (1500-30…
Discovery of five Green pea galaxies with double-peaked narrow [O III] lines
Zheng, Zhen-Ya; Wang, Jun-Xian; Malhotra, Sangeeta +9 more
Although double-peaked narrow emission-line galaxies have been studied extensively in the past years, only a few are reported with the Green pea (GP) galaxies. Here we present our discovery of five GP galaxies with double-peaked narrow [O III] emission lines, referred to as DPGPs, selected from the LAMOST and SDSS spectroscopic surveys. We find th…
Spatial Evolution of 20 MeV Solar Energetic Proton Events
Kahler, S. W.; Reames, D. V.; Ling, A. G.
The longitudinal extents of solar energetic (E > 10 MeV) particle (SEP) events in the heliosphere are a characteristic important for understanding SEP acceleration and transport as well as their space weather effects. SEP detectors on the STEREO A and B spacecraft launched in 2008, combined with those on Earth-orbiting spacecraft, have enabled …
A novel methodology to estimate pre-atmospheric dynamical conditions of small meteoroids
Weryk, Robert; Janches, Diego; Stober, Gunter +5 more
Recent observations using the Wind and Ulysses spacecrafts and the Solar Occultation For Ice Experiment (SOFIE) during the period between 2007 and 2020 indicate a total cosmic dust influx at Earth ranging from 22 to 32 tonnes per day. Much is still unclear about the formation, evolution, and propagation of this cosmic dust throughout our Solar Sys…
The Solar Ultra-Violet Imaging Telescope (SUIT) Onboard Intelligence for Flare Observations
Tripathi, Durgesh; Tyagi, Anurag; Sankarasubramanian, K. +14 more
Aditya-L1 is India's first observatory-class solar space mission to study the Sun from the Lagrange L1 point. The Solar Ultra-Violet Imaging Telescope (SUIT) is one of the payloads onboard Aditya-L1. SUIT is an off-axis Ritchey-Chrétien (RC) telescope, which images the Sun onto a 4k×4k CCD covering a field-of-view of 1.5 R⊙ w…
Absorption-line Observations of {{H}}_{3}(+) and CO in Sight Lines Toward the Vela and W28 Supernova Remnants
Indriolo, Nick
Supernova remnants act as particle accelerators, providing the cosmic-ray protons that permeate the interstellar medium and initiate the ion-molecule reactions that drive interstellar chemistry. Enhanced fluxes of cosmic-ray protons in close proximity to supernova remnants have been inferred from observations tracing particle interactions with nea…
A variable active galactic nucleus at z = 2.06 triply-imaged by the galaxy cluster MACS J0035.4-2015
Koekemoer, Anton M.; Charlot, Stéphane; Chevallard, Jacopo +32 more
We report the discovery of a triply imaged active galactic nucleus (AGN), lensed by the galaxy cluster MACS J0035.4-2015 (zd = 0.352). The object is detected in Hubble Space Telescope imaging taken for the RELICS program. It appears to have a quasi-stellar nucleus consistent with a point-source, with a de-magnified radius of re
The K2 and TESS Synergy. II. Revisiting 26 Systems in the TESS Primary Mission
Vanderburg, Andrew; Bieryla, Allyson; Latham, David W. +16 more
The legacy of NASA's K2 mission has provided hundreds of transiting exoplanets that can be revisited by new and future facilities for further characterization, with a particular focus on studying the atmospheres of these systems. However, the majority of K2-discovered exoplanets have typical uncertainties on future times of transit within the next…
The Spatial and Emission Properties of the Large [O III] Emission Nebula Near M31
Shull, J. Michael; Fesen, Robert A.; Kimeswenger, Stefan +8 more
Drechsler et al. reported the unexpected discovery of a 1.°5 long [O III] emission nebula 1.°2 southeast of the M31 nucleus. Here we present additional images of this large emission arc, called the Strottner-Drechsler-Sainty Object (SDSO), along with radial velocity and flux measurements from low-dispersion spectra. Independent sets of [O III] ima…