A5082304822- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Spacecraft and Cryogenic Technologies
- Astrophysical Phenomena and Observations
- Galaxies: Formation, Evolution, Phenomena
- Calibration and Measurement Techniques
- Radio Astronomy Observations and Technology
- Molecular Spectroscopy and Structure
- Astrophysics and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Planetary Science and Exploration
- SAS software applications and methods
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Space Exploration and Technology
- Spacecraft Design and Technology
- Solar and Space Plasma Dynamics
- Methane Hydrates and Related Phenomena
- Pulsars and Gravitational Waves Research
California Institute of Technology
2015-2024
Infrared Processing and Analysis Center
2014-2024
Fermi National Accelerator Laboratory
2024
Wayne State College
2024
Toronto General Hospital
2020-2024
University Health Network
2024
University of Toronto
2024
VA Boston Healthcare System
2022-2024
Natera (United States)
2024
Cerner (United States)
2022-2023
The Infrared Array Camera (IRAC) is one of three focal plane instruments in the Spitzer Space Telescope. IRAC a four-channel camera that obtains simultaneous broad-band images at 3.6, 4.5, 5.8, and 8.0 microns. Two nearly adjacent 5.2x5.2 arcmin fields view are viewed by four channels pairs (3.6 5.8 microns; 4.5 8 microns). All detector arrays 256x256 pixels size, with two shorter wavelength using InSb longer Si:As IBC detectors. powerful survey instrument because its high sensitivity, large...
We present the first results from science demonstration phase for Hi-GAL survey, <i>Herschel<i/> key program that will map inner Galactic plane of Milky Way in 5 bands. outline our data reduction strategy and some highlights on two observed 2° × tiles approximately centered at <i>l<i/> = 30° 59°. The regions are extremely rich intense highly structured extended emission which shows a widespread organization filaments. Source SEDs can be built hundreds objects fields, physical parameters...
We have carried out a survey of the north and south ecliptic poles, EP-N EP-S, respectively, with Spitzer Space Telescope Wide-field Infrared Survey Explorer (WISE). The primary objective was to cross-calibrate WISE Midcourse Experiment (MSX) photometric systems by developing set calibration stars that are common these infrared missions. poles were continuous viewing zones for due its polar-crossing orbit, making areas ideal both absolute internal calibrations. IRAC MIPS imaging covers...
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...
Hi-GAL, the Herschel infrared Galactic Plane Survey, is an Open Time Key Project of Space Observatory. It will make unbiased photometric survey inner plane by mapping a 2° wide strip in longitude range ∣l∣ < 60° five wavebands between 70 μm and 500 μm. The aim Hi-GAL to detect earliest phases formation molecular clouds high-mass stars use optimum combination wavelength coverage, sensitivity, strategy, speed deliver homogeneous census star-forming regions cold structures interstellar medium....
The Midcourse Space Experiment (MSX) surveyed the entire Galactic plane within |b| ≤ 5° in four mid-infrared spectral bands between 6 and 25 μm at a spatial resolution of ∼183. survey was redundant 45 with four-fold coverage over two-thirds area. These data were combined to create 1680 15 × images that cover region 6'' pixel spacing each bands. preserve inherent but have up twice sensitivity single scan. individual observations had be extensively conditioned achieve co-add advantage. noise...
The Infrared Array Camera (IRAC) on the Spitzer Space Telescope is absolutely calibrated by comparing photometry a set of A stars near north ecliptic pole to predictions based ground-based observations and stellar atmosphere model. brightness point sources an accuracy 3%, relative models for star atmospheres, performed analyzed in same manner as calibration stars. This includes corrections location array if centroid within peak pixel. Long-term stability IRAC was measured monitoring dwarfs K...
We present the Coordinated Synoptic Investigation of NGC 2264, a continuous 30-day multi-wavelength photometric monitoring campaign on more than 1000 young cluster members using 16 telescopes. The unprecedented combination multi-wavelength, high-precision, high-cadence, and long-duration data opens new window into time domain behavior stellar objects. Here we provide an overview observations, focusing results from Spitzer CoRoT. highlight this work is detailed analysis 162 classical T Tauri...
Thermal images of cold dust in the Central Molecular Zone Milky Way, obtained with far-infrared cameras on board Herschel satellite, reveal a ∼3 × 107 M☉ ring dense and clouds orbiting Galactic center. Using simple toy model, an elliptical shape having semi-major axes 100 60 pc is deduced. The major axis this inclined by about 40° respect to plane sky oriented perpendicular Bar. appears trace system stable x2 orbits predicted for barred potential. Sgr A⋆ displaced geometrical center symmetry...
This article summarizes a workshop held on March, 2014, the potential of James Webb Space Telescope (JWST) to revolutionize our knowledge physical properties exoplanets through transit observations. JWST's unique combination high sensitivity and broad wavelength coverage will enable accurate measurement transits with signal-to-noise ratio (S/N). Most importantly, JWST spectroscopy investigate planetary atmospheres determine atomic molecular compositions, probe vertical horizontal structure,...
We report on the properties of pre-main-sequence objects in Taurus molecular clouds as observed seven mid- and far-infrared bands with Spitzer Space Telescope. There are 215 previously identified members star-forming region our ∼44 deg2 map; these exhibit a range colors that we take to define young stars still surrounded by circumstellar dust (noting ∼20% bona fide no detectable excesses). looked for new survey field similar properties, aided extensive optical, X-ray, ultraviolet imaging,...
HAT-P-20b is a giant metal-rich exoplanet orbiting star. We analyze two secondary eclipses of the planet in each 3.6 and 4.5 μm bands Warm Spitzer. have developed simple, powerful, radically different method to correct intra-pixel effect for Spitzer data, which we call pixel-level decorrelation (PLD). PLD corrects very effectively, but without explicitly using—or even measuring—the fluctuations apparent position stellar image. illustrate validate using synthetic real data comparing results...
(Abridged) We present the first public release of high-quality data products (DR1) from Hi-GAL, {\em Herschel} infrared Galactic Plane Survey. Hi-GAL is keystone a suite continuum surveys near-IR to radio, and covers five wavebands at 70, 160, 250, 350 500 micron, encompassing peak spectral energy distribution cold dust for 8 < T 50K. This inner Milky Way in longitude range 68{\deg} > l -70{\deg} |b|<1{\deg} latitude strip. Photometric maps have been produced with ROMAGAL pipeline, that...
Abstract We have collected transit times for the TRAPPIST-1 system with Spitzer Space Telescope over four years. add to these ground-based, HST, and K2 transit-time measurements, revisit an N -body dynamical analysis of seven-planet using our complete set from which we refine mass ratios planets star. next carry out a photodynamical light curves derive density host star planet densities. find that all seven planets’ densities may be described single rocky mass–radius relation is depleted in...
We present Submillimeter Array (SMA) λ = 0.88 and 1.3 mm broad-band observations, Very Large (VLA) observations in NH3 (J, K) (1,1) up to (5,5), H2O CH3OH maser lines towards the two most massive molecular clumps infrared dark cloud (IRDC) G11.11−0.12. Sensitive high-resolution images reveal hierarchical fragmentation dense gas from ∼1 pc clump scale down ∼0.01 condensation scale. At each scale, mass of fragments is orders magnitude larger than Jeans mass. This common all four IRDC we...
We present results of the coordinated observing campaign that made first subarcsecond localization a Fast Radio Burst, FRB 121102. During this campaign, we simultaneous detection an burst by multiple telescopes: VLA at 3 GHz and Arecibo Observatory 1.4 GHz. Of nine bursts detected Very Large Array GHz, four had coverage other observatories. use multi-observatory constraints modeling seen only to confirm earlier showing spectra are not well modeled power law. find characterized ~500 MHz...
Context. The TRAPPIST-1 system hosts seven Earth-sized, temperate exoplanets orbiting an ultra-cool dwarf star. As such, it represents a remarkable setting to study the formation and evolution of terrestrial planets that formed in same protoplanetary disk. While sizes are all known better than 5% precision, their densities have significant uncertainties (between 28% 95%) because poor constraints on planet's masses. Aims.The goal this paper is improve our knowledge planetary masses using...
Recent observations by the Midcourse Space Experiment (MSX) have revealed presence of compact objects seen in absorption against bright mid-infrared emission from Galactic plane. Examination MSX and IRAS images these reveal that they are dark 7 to 100 μm. We find ~2000 clouds a 1° × 180° scan along equator. The data suggest dense (n > 105 cm−3), cold (T<20 K) cores, without accompanying envelopes.
The SPIRIT III infrared telescope on the Midcourse Space Experiment (MSX) satellite has provided an unprecedented view of mid-infrared emission (8-25 μm) Galactic plane. An initial analysis images from MSX plane survey data reveals dark clouds seen in silhouette against bright (Egan et al.). These have extinctions excess 2 mag at 8 μm. We probed physical properties 10 these using millimeter-wave molecular rotational lines as indicator dense gas. All were detected millimeter spectral H2CO,...
Context.While low mass clouds have been relatively well studied, our picture of high-mass star formation remains unclear. Infrared Dark Clouds appear to be the long sought population cold and dense aggregations with potential harbouring earliest stages massive formation. Up now there has no systematic study on temperature distribution, velocity fields, chemical physical state toward this new cloud population.
We combine the results from several multiplicity surveys of pre-main-sequence stars located in four nearby star-forming regions with Spitzer data three different Legacy Projects. This allows us to construct a sample 349 targets, including 125 binaries, which we use investigate effect companions on evolution circumstellar disks. find that distribution projected separations systems excesses is significantly (P∼ 2.4e-5, according K–S test for binaries less than 400 AU) lacking evidence disk. As...
We combine Spitzer and ground-based observations to measure the microlens parallax vector , thus mass distance of OGLE-2014-BLG-0124L, making it first microlensing planetary system with a space-based measurement. The planet star have masses m ∼ 0.5 Mjup M 0.7 M☉ are separated by a⊥ 3.1 AU in projection. main source uncertainty all these numbers (approximately 30%, 20%) is relatively poor measurement Einstein radius θE, rather than πE, which measured 2.5% precision. This compares 22% based on...