Search Publications
Probing Reflection from Aerosols with the Near-infrared Dayside Spectrum of WASP-80b
Fortney, Jonathan J.; Stevenson, Kevin B.; Désert, Jean-Michel +9 more
The presence of aerosols is intimately linked to the global energy budget and the composition of a planet's atmosphere. Their ability to reflect incoming light prevents energy from being deposited into the atmosphere, and they shape the spectra of exoplanets. We observed five near-infrared secondary eclipses of WASP-80b with the Wide Field Camera …
JWST Reveals Widespread CO Ice and Gas Absorption in the Galactic Center Cloud G0.253+0.016
Lu, Xing; Henshaw, Jonathan D.; Ginsburg, Adam +7 more
We report JWST NIRCam observations of G0.253+0.016, the molecular cloud in the Central Molecular Zone known as "The Brick," with the F182M, F187N, F212N, F410M, F405N, and F466N filters. We catalog 56,146 stars detected in all six filters using the crowdsource package. Stars within and behind The Brick exhibit prodigious absorption in the F466N fi…
The IR Compactness of Dusty Galaxies Sets Star Formation and Dust Properties at z ∼ 0-2
Kirkpatrick, Allison; Inami, Hanae; McKinney, Jed +9 more
The surface densities of gas, dust, and stars provide a window into the physics of star formation that, until the advent of high-resolution far-IR/submillimeter observations, has been historically difficult to assess among dusty galaxies. To study the link between IR surface densities and dust properties, we leverage the Atacama Large Millimetre/S…
Investigating the Origin of the Absorption-line Variability in the Narrow-line Seyfert 1 Galaxy WPVS 007
Komossa, S.; Gallagher, Sarah C.; Terndrup, Donald M. +5 more
Broad absorption line quasars are actively accreting supermassive black holes that have strong outflows characterized by broad absorption lines in their rest-UV spectra. Variability in these absorption lines occurs over months to years depending on the source. WPVS 007, a low-redshift, low-luminosity narrow-line Seyfert 1 (NLS1) shows strong varia…
Anisotropic Ionizing Illumination from an M-type Pre-main-sequence Star, DM Tau
Tamura, Motohide; Liu, Hauyu Baobab; Hashimoto, Jun +6 more
The powerful, high-energy magnetic activities of young stars play important roles in the magnetohydrodynamics in the innermost parts of the protoplanetary disks. In addition, the associated UV and X-ray emission dictates the photochemistry; moreover, the corona activities can affect the atmosphere of a newborn extrasolar planet. How the UV and X-r…
Expulsion of Counter Evershed Flows from Sunspot Penumbrae
Solanki, S. K.; Korpi-Lagg, A.; Castellanos Durán, J. S.
In addition to the Evershed flow directed from the umbra toward the outer boundary of a sunspot, under special circumstances a counter Evershed flow (CEF) in the opposite direction also occurs. We aim to characterize the proper motions and evolution of three CEFs observed by the Solar Optical Telescope on board the Japanese Hinode spacecraft and t…
When the Stars Align: A 5σ Concordance of Planetary Nebulae Major Axes in the Center of Our Galaxy
Parker, Quentin A.; Ritter, Andreas; Zijlstra, Albert A. +2 more
We report observations of a remarkable major axes alignment nearly parallel to the Galactic plane of 5σ significance for a subset of bulge "planetary nebulae" (PNe) that host, or are inferred to host, short-period binaries. Nearly all are bipolar. It is solely this specific PN population that accounts for the much weaker statistical alignments pre…
An Ongoing Tidal Capture in the Large Magellanic Cloud: The Low-mass Star Cluster KMK 88-10 Captured by the Massive Globular Cluster NGC 1835?
Vesperini, Enrico; Cadelano, Mario; Pallanca, Cristina +6 more
In the context of a project aimed at characterizing the dynamical evolution of old globular clusters in the Large Magellanic Cloud, we have secured deep HST/WFC3 images of the massive cluster NGC 1835. In the field of view of the acquired images, at a projected angular separation of approximately 2' from the cluster, we detected the small stellar …
Three-stage Collapse of the Long Gamma-Ray Burst from GRB 160625B Prompt Multiwavelength Observations
Rebolo, R.; Lipunov, V. M.; Kornilov, V. G. +37 more
This article presents the early results of synchronous multiwavelength observations of one of the brightest gamma-ray bursts (GRBs) GRB 160625B with the detailed continuous fast optical photometry of its optical counterpart obtained by MASTER and with hard X-ray and gamma-ray emission, obtained by the Lomonosov and Konus-Wind spacecraft. The detai…
Optical and Near-infrared Continuum Emission Region Size Measurements in the Lensed Quasar FBQ J0951+2635
Vrba, Frederick J.; Dahm, Scott E.; Morgan, Christopher W. +5 more
We present 10 seasons of Sloan Digital Sky Survey r-band monitoring observations and five seasons of H-band observations of the two-image system FBQ J0951+2635 from the Kaj Strand Astrometric Reflector at the United States Naval Observatory, Flagstaff Station. We supplement our light curves with six seasons of monitoring data from the literature t…