A5048906460- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Planetary Science and Exploration
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Space Science and Extraterrestrial Life
- Space Exploration and Technology
- Astrophysical Phenomena and Observations
- Spacecraft and Cryogenic Technologies
- Adaptive optics and wavefront sensing
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Optical Polarization and Ellipsometry
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Solar and Space Plasma Dynamics
- Ocular and Laser Science Research
- Geophysics and Sensor Technology
- Astrophysics and Cosmic Phenomena
- Historical Astronomy and Related Studies
- History and Developments in Astronomy
- Advancements in Photolithography Techniques
- Molecular Spectroscopy and Structure
Northern Arizona University
2017-2023
Lawrence Berkeley National Laboratory
2020
Astronomy and Space
2005-2019
Optimax (United States)
2013
University of California System
2010
University of Colorado Boulder
2006
University of Hawaiʻi at Mānoa
2006
University of Colorado System
2006
University of Minnesota
2000
Boston University
1999
The Large Synoptic Survey Telescope is designed to provide an unprecedented optical imaging dataset that will support investigations of our Solar System, Galaxy and Universe, across half the sky over ten years repeated observation. However, exactly how LSST observations be taken (the observing strategy or "cadence") not yet finalized. In this dynamically-evolving community white paper, we explore detailed performance anticipated science expected depend on small changes strategy. Using...
Abstract 1I/‘Oumuamua is the first confirmed interstellar body in our solar system. Here we report on observations of ‘Oumuamua made with Spitzer Space Telescope 2017 November 21–22 (UT). We integrated for 30.2 hr at 4.5 μ m (IRAC channel 2). did not detect object and place an upper limit flux 0.3 Jy (3 σ ). This implies effective spherical diameter less than [98, 140, 440] albedo greater [0.2, 0.1, 0.01] under assumption low, middle, or high thermal beaming parameter η , respectively. With...
The recently discovered minor body 1I/2017 U1 (`Oumuamua) is the first known object in our Solar System that not bound by Sun's gravity. Its hyperbolic orbit (eccentricity greater than unity) strongly suggests it originated outside System; its red color consistent with substantial space weathering experienced over a long interstellar journey. We carry out an simple calculation of probability detecting such object. find observed detection rate 1I-like objects can be satisfied if average mass...
Abstract The Emirates Mars Mission Infrared Spectrometer (EMIRS) will provide remote measurements of the martian surface and lower atmosphere in order to better characterize geographic diurnal variability key constituents (water ice, water vapor, dust) along with temperature profiles on sub-seasonal timescales. EMIRS is a FTIR spectrometer covering range from 6.0-100+ μm (1666-100 cm −1 ) spectral sampling as high 5 5.4-mrad IFOV 32.5×32.5 mrad FOV. optical path includes flat 45° pointing...
The composition of comets in the Solar System come multiple groups thought to encode information about their formation different regions outer protosolar disk. recent discovery second interstellar object, 2I/Borisov, allows for spectroscopic investigations into its gas content and a preliminary classification it within comet taxonomies test applicability planetesimal models other stellar systems. We present imaging observations from 2019 September 20th October 26th at Bok, MMT, LBT...
Abstract Thermal infrared spectra taken by the Emirates Mars Infrared Spectrometer (EMIRS) on‐board Mission (EMM) spacecraft are well suited for retrieval of surface temperatures, atmospheric temperature profile from to ∼40 km, and column abundance dust aerosols, water ice clouds, vapor. A constrained linear inversion routine that includes multiple scattering has been developed optimized this purpose. Here, we present a brief overview algorithm first science results observations EMIRS over...
Abstract Diurnal analyses of water ice cloud optical depths retrieved from thermal infrared spectra by the Emirates Mars Infrared Spectrometer showed changing abundance throughout Martian day. Observations began with start Mission science phase near beginning aphelion‐season in Year 36 and included prominent aphelion belt (ACB) orographic clouds vicinity volcanoes. A midday minimum higher morning afternoon was typical for ACB, though considerable spatial variability this diurnal pattern....
Condensation and sublimation of ices at the surface planet is a key part both Martian H$_2$O CO$_2$ cycles, either from seasonal or diurnal aspect. While most ice located within polar caps, frost known to be formed during nighttime down equatorial latitudes. Here, we use data Emirates Mars Infrared Spectrometer (EMIRS) onboard Mission (EMM) monitor evolution over almost one year. The unique local time coverage provided by instrument allows us observe apparition in second half night around...
We report on an unprecedented infrared time series of spectra V1187 Sco, a very fast ONeMg nova. The observations covered 56 day period (2004 August 6-September 30) starting 2 days after the nova's peak brightness. Time evolution revealed changing line strengths and profiles timescales less than to weeks as nova evolved from early postmaximum coronal phases. When our ground-based optical Spitzer Space Telescope data were combined, wavelength coverage 0.38-36 μm allowed accurate spectral...
Dust from core-collapse supernovae (CCSNe), specifically Type IIP SNe, has been suggested to be a significant source of the dust observed in high-redshift galaxies. CCSNe eject large amounts newly formed heavy elements, which can condense into grains cooling ejecta. However, infrared (IR) observations typical generally measure masses that are too small account for production needed at high redshifts. IIn classified by their dense circumstellar medium (CSM), also known exhibit strong IR...
We present JWST observations of the Crab Nebula, iconic remnant historical SN 1054. The include NIRCam and MIRI imaging mosaics, plus MIRI/MRS IFU spectra that probe two select locations within ejecta filaments. derive a high-resolution map dust emission show grains are concentrated in innermost, high-density These dense filaments coincide with multiple synchrotron bays around periphery Crab's pulsar wind nebula (PWN). measure spectral index changes small-scale features PWN's torus region,...
Abstract We assimilate atmospheric temperatures from the Emirates Mars Infrared Spectrometer on board Mission (EMM) into Planetary Climate Model at start of EMM's early science phase (Mars Year 36 L s = 57.34–92.90°). data assimilation benefits significantly unique near‐hemispheric observations, frequent repeated observations same location, and full diurnal cycle coverage. Our analysis verifies well against in‐sample temperature is 1–3 K warmer than Sounder observations. identify a warm...
In this paper we provide an update on the development of a novel cantilevered-liquid-nitrogen-cooled-silicon mirror for new insertion device beamline included in Advanced Light Source Upgrade (ALS-U). The goals are to achieve diffraction limited performance, demonstrate reliability, minimize coolant flow induced vibration, and carbon contamination prevention cleaning techniques. summarize design requirements, system, prototype fabrication.
Abstract Following the “Great Eruption” of 1843, η Carinae underwent a second major eruption around 1890. We suggest preliminary working model developed during this meeting (in one night, hence term “Blitz”) that attempts to explain temporal development 19th century eruptions Car, as well formation Homunculus nebula (note we are not offering an explanation for cause Great Eruption!). The essence is after Eruption ends, star’s extended outer envelope re-adjusts itself on thermal time scale....
The origins of the martian moons Phobos and Deimos remain enigmatic. Over past decades a range spacecraft have observed in order to constrain their origin evolutionary history, with proposals for ranging from captured asteroids, coalesced material giant impact on Mars. However, given orbits these Deimos, has garnered majority attention. Now thanks unique orbit Emirates Mars Mission (EMM) Hope minor correction its nominal science orbit, EMM opportunity examine great detail while fully...