Search Publications
Charge State Calculation for Global Solar Wind Modeling
Landi, E.; van der Holst, B.; Szente, J.
The charge state composition of the solar wind carries information about the electron temperature, density, and velocity of plasma in the solar corona that cannot always be measured with remote sensing techniques, due to limitations in instrumental sensitivity and field of view as well as line-of-sight integration issues. However, in situ measurem…
Explaining NOMAD D/H Observations by Cloud-Induced Fractionation of Water Vapor on Mars
Aoki, S.; Vandaele, A. C.; Daerden, F. +25 more
The vertical profiles of water vapor and its semi-heavy hydrogen isotope HDO provided by instruments on ExoMars Trace Gas Orbiter constitute a unique new data set to understand the Martian water cycle including its isotopic composition. As water vapor undergoes hydrogen isotopic fractionation upon deposition (but not sublimation), the D/H isotopic…
Deep diving off the 'Cosmic Cliffs': previously hidden outflows in NGC 3324 revealed by JWST
Smith, Nathan; Reiter, Megan; Morse, Jon A. +3 more
We present a detailed analysis of the protostellar outflow activity in the massive star-forming region NGC 3324, as revealed by new Early Release Observations (EROs) from the James Webb Space Telescope (JWST). Emission from numerous outflows is revealed in narrow-band images of hydrogen Paschen α (Paα) and molecular hydrogen. In particular, we rep…
Testing the Limits of AGN Feedback and the Onset of Thermal Instability in the Most Rapidly Star-forming Brightest Cluster Galaxies
McNamara, Brian R.; Donahue, Megan; Voit, G. Mark +8 more
We present new, deep, narrow- and broadband Hubble Space Telescope observations of seven of the most star-forming brightest cluster galaxies (BCGs). Continuum-subtracted [OII] maps reveal the detailed, complex structure of warm (T ~ 104 K) ionized gas filaments in these BCGs, allowing us to measure spatially resolved star formation rate…
Interplanetary Ion Flux Dropouts Across Multiple 3He-Rich Events
Rodríguez-Pacheco, J.; Wimmer-Schweingruber, R. F.; Allen, R. C. +3 more
Solar Orbiter, a joint ESA/NASA mission, is studying the Sun and inner heliosphere in greater detail than ever before. Launched in February 2020, Solar Orbiter has already completed its first three orbits, reaching perihelia of 0.5 au from the Sun in June 2020, February and August 2021. During the first 2 years in orbit, Solar Orbiter observed mul…
A Simulation-driven Deep Learning Approach for Separating Mergers and Star-forming Galaxies: The Formation Histories of Clumpy Galaxies in All of the CANDELS Fields
Conselice, Christopher J.; Ferreira, Leonardo; Kuchner, Ulrike +1 more
Being able to distinguish between galaxies that have recently undergone major-merger events, or are experiencing intense star formation, is crucial for making progress in our understanding of the formation and evolution of galaxies. As such, we have developed a machine-learning framework based on a convolutional neural network to separate star-for…
Discovery of a coherent, wave-like velocity pattern for the Radcliffe wave
Li, Guang-Xing; Chen, Bing-Qiu
Recent studies discovered that part of the Gould Belt belongs to a 2.7 kpc-long coherent, thin wave consisting of a chain of clouds, where a damped undulation pattern has been identified from the spatial arrangement of the clouds. We use the proper motions of young stellar objects anchored inside the clouds to study the kinematic structure of the …
Characteristics of Kepler Eclipsing Binaries Displaying a Significant O'Connell Effect
Perlman, Eric S.; Caballero-Nieves, Saida M.; Knote, Matthew F. +2 more
The O'Connell effect-the presence of unequal maxima in eclipsing binaries-remains an unsolved riddle in the study of close binary systems. The Kepler space telescope produced high-precision photometry of nearly 3000 eclipsing binary systems, providing a unique opportunity to study the O'Connell effect in a large sample and in greater detail than i…
Cosmological Model Tests with JWST
Lovyagin, Nikita; Raikov, Alexander; Yershov, Vladimir +1 more
The James Webb Space Telescope (JWST), which has recently become operational, is capable of detecting objects at record-breaking redshifts, z≳15. This is a crucial advance for observational cosmology, as at these redshifts the differences between alternative cosmological models manifest themselves in the most obvious way. In recent years, some obs…
SILVERRUSH. XII. Intensity Mapping for Lyα Emission Extending over 100-1000 Comoving Kpc around z 2-7 LAEs with Subaru HSC-SSP and CHORUS Data
Ono, Yoshiaki; Ouchi, Masami; Momose, Rieko +14 more
We conduct intensity mapping to probe for extended diffuse Lyα emission around Lyα emitters (LAEs) at z ~2-7, exploiting very deep (~26 mag at 5σ) and large-area (~4.5 deg2) Subaru/Hyper Suprime-Cam narrowband (NB) images and large LAE catalogs consisting of a total of 1540 LAEs at z = 2.2, 3.3, 5.7, and 6.6 obtained by the HSC-SSP and …