Search Publications
The Intrinsic Characteristics of Galaxies on the SFR-M ∗ Plane at 1.2 < z < 4: I. The Correlation between Stellar Age, Central Density, and Position Relative to the Main Sequence
Ferguson, Henry C.; Giavalisco, Mauro; Kartaltepe, Jeyhan S. +12 more
We use the deep CANDELS observations in the GOODS North and South fields to revisit the correlations between stellar mass (M *), star formation rate (SFR) and morphology, and to introduce a fourth dimension, the mass-weighted stellar age, in galaxies at 1.2< z< 4. We do this by making new measures of M *, SFR, and stell…
HST Grism Confirmation of 16 Structures at 1.4 < z < 2.8 from the Clusters Around Radio-Loud AGN (CARLA) Survey
Noirot, Gaël; Gonzalez, Anthony H.; Stanford, S. A. +13 more
We report spectroscopic results from our 40-orbit Hubble Space Telescope slitless grism spectroscopy program observing the 20 densest Clusters Around Radio-Loud AGN (CARLA) candidate galaxy clusters at 1.4 < z < 2.8. These candidate rich structures, among the richest and most distant known, were identified on the basis of [3.6]-[4.5] color f…
The WFC3 Galactic Bulge Treasury Program: Relative Ages of Bulge Stars of High and Low Metallicity
Brown, Thomas M.; Gennaro, Mario; Anderson, Jay +6 more
The Hubble Space Telescope/WFC3 multiband photometry spanning from the UV to the near-IR of four fields in the Galactic bulge, together with that for six template globular and open clusters, are used to photometrically tag the metallicity [Fe/H] of stars in these fields after proper-motion rejecting most foreground disk contaminants. Color-magnitu…
Evidence for Merger-driven Growth in Luminous, High-z, Obscured AGNs in the CANDELS/COSMOS Field
Alexander, D. M.; Salvato, M.; Brusa, M. +27 more
While major mergers have long been proposed as a driver of both active galactic nucleus (AGN) activity and the {M}{BH}{--}{σ }{bulge} relation, studies of moderate to high-redshift Seyfert-luminosity AGN hosts have found little evidence for enhanced rates of interactions. However, both theory and observation suggest that whil…
Scientific Domain Knowledge Improves Exoplanet Transit Classification with Deep Learning
Jenkins, Jon M.; Ansdell, Megan; Osborn, Hugh P. +8 more
Space-based missions such as Kepler, and soon the Transiting Exoplanet Survey Satellite (TESS), provide large data sets that must be analyzed efficiently and systematically. Recent work by Shallue & Vanderburg successfully used state-of-the-art deep learning models to automatically classify Kepler transit signals as either exoplanets or false …
Multiple Rings in the Transitional Disk of GM Aurigae Revealed by VLA and ALMA
Schwarz, Kamber R.; Carrasco-González, Carlos; Ribas, Álvaro +6 more
Our understanding of protoplanetary disks is rapidly departing from the classical view of a smooth, axisymmetric disk. This is in part thanks to the high angular resolution that (sub)millimeter observations can provide. Here, we present the combined results of Atacama Large Millimeter/submillimeter Array (ALMA) (0.9 mm) and Very Large Array (VLA) …
A New Tool for CME Arrival Time Prediction using Machine Learning Algorithms: CAT-PUMA
Wang, Yuming; Shen, Chenglong; Liu, Jiajia +2 more
Coronal mass ejections (CMEs) are arguably the most violent eruptions in the solar system. CMEs can cause severe disturbances in interplanetary space and can even affect human activities in many aspects, causing damage to infrastructure and loss of revenue. Fast and accurate prediction of CME arrival time is vital to minimize the disruption that C…
Spectroscopic Observations of a Current Sheet in a Solar Flare
Feng, L.; Gan, W. Q.; Cheng, X. +6 more
The current sheet is believed to be the region of energy dissipation via magnetic reconnection in solar flares. However, its properties, for example, the dynamic process, are not fully understood. Here, we report a current sheet in a solar flare (SOL2017-09-10T16:06) that was clearly observed by the Atmospheric Imaging Assembly on board the Solar …
A Spatially Resolved au-scale Inner Disk around DM Tau
Dong, Ruobing; Liu, Hauyu Baobab; Tsukagoshi, Takashi +5 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the dust continuum emission at 1.3 mm and 12CO J=2\to 1 line emission of the transitional disk around DM Tau. DM Tau’s disk is thought to possess a dust-free inner cavity inside a few au, from the absence of near-infrared excess on its spectral energy distrib…
Baryon Budget of the Hot Circumgalactic Medium of Massive Spiral Galaxies
Bregman, Joel N.; Anderson, Michael E.; Crain, Robert A. +2 more
The baryon content around local galaxies is observed to be much less than is needed in Big Bang nucleosynthesis. Simulations indicate that a significant fraction of these “missing baryons” may be stored in a hot tenuous circumgalactic medium (CGM) around massive galaxies extending to or even beyond the virial radius of their dark matter halos. Pre…