Keck-I Archives

Top Panel: Absorption cross sections for a temperature of 650K and pressure of 1 bar used in the retrieval analysis from Hood et al. (2024). Bottom Panel: The complete SED for 2MASS J0415−0935 with an inset showing the 9 - 15 µm region. Prominent absorption features are labeled including a tentative CO2 feature between 14 - 16 µm. -- astro-ph.SR

Astronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report

Diversity of Cold Worlds: A Near Complete Spectral Energy Distribution for 2MASS J04151954-0935066 using JWST

by Keith CowingJune 2, 2025June 2, 2025

We present the a near complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS~J04151954−0935066. Spanning from optical to mid-infrared (0.7–20.4 micron) wavelengths, the SED for […]

Left: A zoom-in on the stacked Kp-band image of MOA-2011-BLG-262, with the brighter source star near center and the faint lens star candidate indicated with the cross-hair. Middle: Zoomed-in frame with a single-PSF model fit to the source star and subtracted from the frame, the remaining flux comes primarily from the lens and is indicated with the cross-hair. The other bright nearby stars are also subtracted with the same PSF model. Right: Zoomed-in frame with the PSF model fit and subtracted from the source and lens stars. North is up, East is left in all frames. Note there are several faint ambient field stars that are at or below the default detection threshold in DAOPHOT. -- astro-ph.EP

Astronomy & Telescopes, Exoplanets, -moons, -comets, Gaia Mission, Gas Giants, Imaging & Spectroscopy, Interstellar, Status Report, Stellar Cartography

A Candidate High-Velocity Exoplanet System In The Galactic Bulge

by Keith CowingOctober 16, 2024November 16, 2024

We present an analysis of adaptive optics (AO) images from the Keck-I telescope of the microlensing event MOA-2011-BLG-262. The original discovery paper by Bennett et al. 2014 reports two distinct […]