A5085748065- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Spacecraft and Cryogenic Technologies
- Isotope Analysis in Ecology
- Gamma-ray bursts and supernovae
- Space Exploration and Technology
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Geomagnetism and Paleomagnetism Studies
- High-pressure geophysics and materials
- Space Satellite Systems and Control
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- X-ray Diffraction in Crystallography
- Space Science and Extraterrestrial Life
- Crystallization and Solubility Studies
- Geophysics and Gravity Measurements
- Nuclear physics research studies
- Inertial Sensor and Navigation
- Atmospheric Ozone and Climate
- Methane Hydrates and Related Phenomena
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
Search for Extraterrestrial Intelligence
2016-2022
Goddard Space Flight Center
2013-2018
University of Maryland, College Park
2015-2017
Deleted Institution
2015
University of Minnesota
2007-2011
California Institute of Technology
2004-2009
University of Arizona
2001-2003
MIPSGAL is a 278 deg2 survey of the inner Galactic plane using Multiband Infrared Photometer for Spitzer aboard Space Telescope. The field was imaged in two passbands, 24 and 70 μm with resolutions 6'' 18'', respectively. designed to provide uniform, well-calibrated well-characterized data set general inquiry as longer-wavelength complement shorter-wavelength plane: Plane Mapping Survey Extraordinaire. primary science drivers current are identify all high-mass (M > 5 M⊙) protostars disk...
Rectified diameters and albedo estimates of 1517 main-belt asteroids selected from IRAS the Mid-Course Space Experiment asteroid photometry catalogs are derived updated infrared thermal models, Standard Thermal Model Near-Earth Asteroid (NEATM), Monte Carlo simulations, using new Minor Planet Center compilations absolute magnitudes (H values) constrained by occultation- radar-derived parameters. The NEATM approach produces a more robust estimate albedos diameters, yielding pv (NEATM mean)...
We describe the first data release from Spitzer-IRAC Equatorial Survey (SpIES); a large-area survey of 115 deg^2 in SDSS Stripe 82 field using Spitzer during its 'warm' mission phase. SpIES was designed to probe sufficient volume perform measurements quasar clustering and luminosity function at z > 3 test various models for "feedback" active galactic nuclei (AGN). Additionally, wide range available multi-wavelength, multi-epoch ancillary enables identify both high-redshift (z 5) quasars as...
We present a catalog of 416 extended, resolved, disk- and ring-like objects as detected in the MIPSGAL 24 micron survey Galactic plane. This is result search image data for generally circularly symmetric, extended "bubbles" without prior knowledge or expectation their physical nature. Most have no counterpart at 8 70 micron, with less than 20% detections each wavelength. For 54 central point sources, sources are nearly always seen all IRAC bands. About (16%) been previously identified,...
Aims. Multi-epoch Spitzer Space Telescope 24 μm data is utilized from the MIPSGAL and Taurus Legacy surveys to detect asteroids based on their relative motion.
Abstract We report on a Kepler spacecraft survey during the K2 mission to characterize rotational properties of 56 Trojan asteroids in L4 cloud. More than one period was observed for 51 these targets, allowing well constrained lightcurve rotation periods and amplitudes, five which are found be conflict with previously published values. find ∼10% objects have longer 100 hr, an excess slow rotators 10 times larger suggested from literature. Investigation frequencies our sample when combined...
We present a summary of the campaign remote observations that supported European Space Agency's Rosetta mission. Telescopes across globe (and in space) followed comet 67P/Churyumov-Gerasimenko from before Rosetta's arrival until nearly end mission September 2016. These provided essential data for planning, large-scale context information coma and tails beyond spacecraft, way to directly compare 67P with other comets. The revealed be relatively `well behaved' comet, typical Jupiter family...
We present the results of our monitoring halo black-hole soft X-ray transient (SXT) XTE J1118+480 during its decline to quiescence. The system has decayed 0.5 mags from December 2000 near quiescent level at R=18.65 (June 2001). ellipsoidal lightcurve is distorted by an additional modulation that we interpret as a superhump P_sh=0.17049(1) d i.e. 0.3% longer than orbital period. This implies disc precession period P_prec= 52 d. After correcting average phase-folded light curve for veiling,...
We report optical imaging, and near-infrared polarimetry, Spitzer mid-infrared spectroscopy of comet C/2007 N3 (Lulin). Polarimetric observations were obtained in R (0.676 μm) at phase angles from 044 to 21° with simultaneous H (1.65 40, exploring the negative branch polarization. Comet (Lulin) shows a typical polarization as well similar wavelengths. The 10 μm silicate feature is only weakly emission and, according our thermal models, consistent mixture carbon material. argue that large,...
We present optical photometry of XTE J2123-058 taken in 1999 and 2000, during its quiescent state. The dominant feature our R-band light curve is the ellipsoidal modulation secondary star; however, order to fit this satisfactorily, we require additional components that comprise an X-ray-heated Roche lobe-filling star accretion disk bulge, i.e., where gas stream impacts disk. observed dip near phase 0.8 interpreted as eclipse inner parts by bulge. This scenario highly plausible given high...
We present pre-perihelion infrared 8–31 μm spectrophotometric and imaging observations of comet C/2012 K1 (Pan-STARRS), a dynamically new Oort Cloud comet, conducted with NASA's Stratospheric Observatory for Infrared Astronomy facility (+FORCAST) in 2014 June. As "new" (first inner solar system passage), the coma grain population may be extremely pristine, unencumbered by rime insufficiently irradiated Sun to carbonize its surface organics. The exhibited weak 10 silicate feature ≃1.18 ± 0.03...
We present analysis of the asteroid surface density distribution main-belt asteroids (mean perihelion Δ ≃ 2.404 AU) in five ecliptic latitude fields, −17 ≳ β(°) ≲ +15, derived from deep Large Binocular Telescope V-band (85% completeness limit V = 21.3 mag) and Spitzer Space IRAC 8.0 μm (80% ∼103 μJy) fields enabling us to probe 0.5–1.0 km diameter population. discovered 58 new optical survey as well 41 bodies fields. The power-law slopes number per square degree are similar within each ∼5°...
We present thermal 24 $\mu$m observations from the \textit{Spitzer Space Telescope} of 62 Hilda asteroid group members with diameters ranging 3 to 12 kilometers. Measurements emission when combined reported absolute magnitudes allow us constrain albedo and diameter each object. From our \textit{Spitzer} sample, we find mean geometric albedo, $p_{V} =$ 0.07 $\pm$ 0.05 for small (D $<$ 10 km) asteroids. This value $p_{V}$ is greater than spans a larger range in space large $\gtrsim$ asteroids...
The James Webb Space Telescope (JWST) has the potential to enhance our understanding of near-Earth objects (NEOs). We present results investigations into observability NEOs given nominal observing requirements JWST on elongation (85°–135°) and non-sidereal rates (<30 mas s−1). find that approximately 75% can be observed in a year. However, observers will need wait for appropriate windows. easily execute photometric observations meter-sized small NEO population.
The Spitzer First Look Survey (FLS) provided an initial characterization of the infrared sky at wavelengths and sensitivities. ecliptic plane component (EPC) FLS concentrated on two 0.13 deg2 fields a solar elongation 115° latitudes (β) 0° +5°. FLS-EPC explored small asteroid counts 8 24 μm, with detection limit down to ∼0.08 0.8 mJy, respectively, completeness almost twice as deep μm equivalent flux density previous deepest mid-IR survey. also zodiacal light near plane. Fifteen known 19...
Deep optical imaging at the location of pointlike X-ray source center ≃300 yr old Cassiopeia A supernova remnant discovered in Chandra first-light observation is presented. R-band images obtained with Steward Observatory 2.3 m telescope and direct CCD on four nights 1999 September are used to set a new brightness limit R ≳ 26.3 mag (1 σ) presence any object associated source. This implies MR 10.3 LX(0.2-10 keV)/Lopt 800. Accretion models most constrained by results. Binary accretion...
The rich data archive from the Spitzer cryogenic mission will be comprised of approximately 25 TB data. A five‐year warm would add an additional 15–20 TB. All these processed and archived to form homogeneous, reliable database support research for decades after end mission. SSC proposes a robust archival program during phase. sampling possible programs are described.