A5022378363- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Ionosphere and magnetosphere dynamics
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Geomagnetism and Paleomagnetism Studies
- Impact of Light on Environment and Health
- Radio Astronomy Observations and Technology
- Adaptive optics and wavefront sensing
- Particle accelerators and beam dynamics
- Solar Radiation and Photovoltaics
- Molecular Spectroscopy and Structure
- Galaxies: Formation, Evolution, Phenomena
- Spectroscopy and Laser Applications
- Image Processing Techniques and Applications
- Historical Astronomy and Related Studies
- Space exploration and regulation
- Medical Imaging Techniques and Applications
- Global Energy and Sustainability Research
- Calibration and Measurement Techniques
Boston College
2011-2024
United States Air Force Research Laboratory
2009
Hanscom Air Force Base
2009
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...
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 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,...
We present an all-sky flux catalog of 760 H II regions with angular sizes ranging up to 10' at 4.85 GHz. The data were compiled in a self-consistent manner from existing images the Green Bank and Parkes-MIT-NRAO GHz radio continuum surveys. Nearly 35% these have fluxes measured surveys for first time. compared our results previously published source catalogs that fit same data. new measurements agree within 5%-7% values fall well formal errors. diameters 16% fits data, which is uncertainties values.
view Abstract Citations (96) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Kinematic Distances of Galactic H II Regions from i Absorption Studies Kuchar, Thomas A. ; Bania, T. M. A catalog kinematic distances for sample first quadrant regions is presented. I absorption spectra were obtained toward 57 and used to resolve the distance ambiguity. Combined with our previous study, are presented a total 70 regions, 45 which new determinations....
The Solar Mass Ejection Imager (SMEI) on the Coriolis spacecraft has been obtaining white light images of nearly full sky every 102 minutes for three years. We present statistical results analysis SMEI observations coronal mass ejections (CMEs) traveling through inner heliosphere; 139 CMEs were observed during first 1.5 years operations. At least 30 these by to propagate out 1 AU and beyond associated with major geomagnetic storms at Earth. Most as frontside halo events SOHO LASCO coronagraphs.
The weekly averaged near-infrared fluxes for 2652 stars were extracted from the cold and warm era all-sky maps of Diffuse Infrared Background Experiment (DIRBE). Since DIRBE program only archived individual Calibrated Observations 10 month mission, all that available era. steps required to extract stellar are described as adjustments necessary correct results several systematic effects. observations at a cadence once week 3.6 years (∼1300 days), providing continuous sampling on variable span...
We present the first clear observations of an Earth‐directed interplanetary disturbance tracked by Solar Mass Ejection Imager (SMEI). find that this event can be related to two halo CMEs seen at Sun about 2 days earlier, and which merged in transit 1 AU. The was 16 hours before it reached Earth,and caused a severe geomagnetic storm time would have been predicted had SMEI operating as real‐time monitor. It is concluded capable giving many advance warning possible arrival disturbances.
Comets C/2001 Q4 (NEAT) and C/2002 T7 (LINEAR) passed within ~0.3 AU of Earth in April May 2004. Their tails were observed by the Earth-orbiting Solar Mass Ejection Imager (SMEI) during this period. A time series photometric SMEI sky maps displays motions frequent disruptions comet plasma tails. Ephemerides are used to unfold observing geometry; often seen extend ~0.5 from nuclei. Having selected 12 more prominent as "events" for further study, we introduce a new method determining solar...
The McIntosh Archive consists of a set hand-drawn solar Carrington maps created by Patrick from 1964 to 2009. used mainly H, He-I 10830Å and photospheric magnetic measurements both ground-based NASA satellite observations. With these he traced polarity inversion lines (PILs), filaments, sunspots plage and, later, coronal holes over ~45-year period. This yielded unique record synoptic features associated with the large-scale field four complete cycles. We first discuss how similar have been...
The Solar Mass Ejection Imager (SMEI) was the first of a new class heliospheric and astronomical white-light imager. A imager operates in fashion similar to coronagraphs, that it observes solar photospheric white light has been Thomson scattered by free electrons wind plasma. Compared with traditional this differs at much larger angles from Sun. This turn requires higher sensitivity wider dynamic range for measured intensity. SMEI launched on Coriolis spacecraft January 2003 deactivated...
The Solar Mass Ejection Imager (SMEI) is a sensitive scanning instrument mounted on the Coriolis satellite that assembles an approximately all‐sky image of heliosphere in red‐biased visible light once per orbit. Its lines sight pass obliquely through topside ionosphere and magnetosphere. We present serendipitous observations visual phenomenon detected at high altitudes (≥840 km) over auroral zones polar caps. observed two basic forms. first, more common, are periods brief (1–3 min), nearly...
We have imaged seven nearby star-forming regions, the Rosette Nebula, Orion W3, Pleiades, G300.2-16.8, S263, and G159.6-18.5, with Spatial Infrared Imaging Telescope on Midcourse Space Experiment (MSX) satellite at 18'' resolution 8.3, 12.1, 14.7, 21.3 μm. The large angular scale of regions (∼7.2–50 deg2) makes these data unique in terms combination size resolution. In addition to two cirrus-free fields (MSXBG 160 MSXBG 161) a field near south Galactic pole 239) were also imaged. Point...
We describe improvements to the data processing pipeline for Spitzer MIPSGAL survey of Galactic plane. These involve both 24 μm data, in particular handling saturations and near-saturated mitigation various artifacts not corrected basic calibration pipeline. The addressed postpipeline are typically caused by passage across bright point sources very common plane, include column-to-column "jailbar" striping, latency effects resulting short-duration afterimages long-duration responsivity...
The Solar Mass Ejection Imager observed an extremely faint interplanetary coronal mass ejection (ICME) as it passed Comet C/2001 Q4 (NEAT) on 5 May 2004, apparently causing a disruption of its plasma tail. This is the first time that ICME has been directly interacting with comet. SMEI's nearly all‐sky coverage and image cadence afforded unprecedented this rarely event. onset appeared “kink” moving antisunward eventually developed knots within disturbed These to be swept up in solar wind...
Interplanetary coronal mass ejections (ICMEs) are the primary cause of severe space weather at Earth because they drive shocks and trigger geomagnetic storms that can damage spacecraft ground‐based systems. The Solar Mass Ejection Imager (SMEI) is a U. S. Air Force experiment with ability to track ICMEs in white light from near Sun beyond, thus providing an extended observational range for forecasting storms. We summarize several studies SMEI's detection tracking capability, especially...
Abstract Features at the Sun’s surface and atmosphere are constantly changing due to its magnetic field. The McIntosh Archive provides a long-term (45 yr) record of these features, digitized from hand-drawn synoptic maps by Patrick McIntosh. Utilizing this data, we create stack plots for coronal holes, i.e., Hovmöller-type latitude bands, all longitudes, stacked in time, allowing tracking hole movement. Using newly developed two-step method centroid calculation, which includes Fourier...
view Abstract Citations (36) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A High-Resolution H i Survey of the Rosette Nebula Kuchar, Thomas A. ; Bania, T. M. We analyzed gross physical properties atomic gas associated with Molecular Complex (RMC) which was derived from a new high-resolution 21 cm survey. At distance RMC, 4 arcmin angular resolution survey corresponds to linear size 2 pc. The I maps presented here cover an area 110 x 60 If...
Abstract The McIntosh Archive consists of four solar cycles (SC20–23) synoptic maps features (magnetic polarities, coronal holes, filaments, sunspots, plage) that were produced by Patrick and his cartographers. In this paper we present the full for first time find a hemispheric pattern hole polarity reflecting Hale sunspot pattern. addition, supplemental set related created 2019–2020 minimum in support Whole Heliosphere Planetary Interactions (WHPI) interval. To facilitate cross calibrate...
view Abstract Citations (26) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS H i Emission-Absorption Experiments toward Galactic II Regions Kuchar, Thomas A. ; Bania, T. M. 21 cm atomic hydrogen emission-absorption experiments have been conducted 19 regions lying within 1 deg of the plane. With exception one source, absorption has detected at recombination line velocity each region. 141 features positive LSR velocities identified. If observed...