An X-Ray, Optical and Infra-red study of High-Mass X
... BINARIES IN THE SMALL MAGELLANIC CLOUD by Lee John Townsend ...
... BINARIES IN THE SMALL MAGELLANIC CLOUD by Lee John Townsend ...
The visibility of Lyman Alpha Emitters: constraining reionization
... GADGET-2 to obtain the physical properties of z ≃ 5.7 galaxies, (b) a dust model that took into account the entire star formation history of each galaxy to calculate its dust enrichment and, (c) a RT code (CRASH) to obtain the ionization fields to calculate the IGM Lyα transmission for each galaxy, ...
... GADGET-2 to obtain the physical properties of z ≃ 5.7 galaxies, (b) a dust model that took into account the entire star formation history of each galaxy to calculate its dust enrichment and, (c) a RT code (CRASH) to obtain the ionization fields to calculate the IGM Lyα transmission for each galaxy, ...
Observational Studies of Interacting Galaxies and the Development
... photometric studies better constrain the number density evolution of wet and dry mergers through five CFHTLS broad band photometry up to z ∼ 1. Meanwhile, by comparing the merger and elliptical galaxy mass density function, I discovered that the most massive mergers are not all formed via merging pr ...
... photometric studies better constrain the number density evolution of wet and dry mergers through five CFHTLS broad band photometry up to z ∼ 1. Meanwhile, by comparing the merger and elliptical galaxy mass density function, I discovered that the most massive mergers are not all formed via merging pr ...
Impact of Protostellar Outflow on Star Formation: Effects of Initial
... 2008b). Since the magnetic field and rotation are normalized by the central density and each model is characterized by only the central density, each cloud has a different magnetic field strengths and angular velocity. The magnetic field (B0 ) and angular velocity (Ω0 ) for each model are summarized in ...
... 2008b). Since the magnetic field and rotation are normalized by the central density and each model is characterized by only the central density, each cloud has a different magnetic field strengths and angular velocity. The magnetic field (B0 ) and angular velocity (Ω0 ) for each model are summarized in ...
DUSTiNGS III: Distribution of Intermediate
... in Nearby Galaxies with Spitzer (DUSTiNGS) survey (Boyer et al. 2015b, hereafter Paper I), we study the radial distributions of the intermediate-age stellar population in nine dwarf galaxies (traced by thermally-pulsating asymptotic giant branch (TP-AGB) stars) and compare their distributions with t ...
... in Nearby Galaxies with Spitzer (DUSTiNGS) survey (Boyer et al. 2015b, hereafter Paper I), we study the radial distributions of the intermediate-age stellar population in nine dwarf galaxies (traced by thermally-pulsating asymptotic giant branch (TP-AGB) stars) and compare their distributions with t ...
Star Formation in the Milky Way and Nearby Galaxies Further
... The immense expansion of this subject, in terms of both the volume of results and the range of physical scales explored, may help to explain one of its idiosyncrasies, namely the relative isolation between the community studying individual star-forming regions and stars in the Milky Way (MW; also so ...
... The immense expansion of this subject, in terms of both the volume of results and the range of physical scales explored, may help to explain one of its idiosyncrasies, namely the relative isolation between the community studying individual star-forming regions and stars in the Milky Way (MW; also so ...
TheSkyX - Physics!
... commitment on the part of Software Bisque. The software and/or databases described in this document are furnished under a license agreement or nondisclosure agreement. They may be used or copied only in accordance with the terms of the agreement (www.bisque.com/eula). It is against the law to copy t ...
... commitment on the part of Software Bisque. The software and/or databases described in this document are furnished under a license agreement or nondisclosure agreement. They may be used or copied only in accordance with the terms of the agreement (www.bisque.com/eula). It is against the law to copy t ...
optimizing the performance of as-manufactured grazing incidence x
... Figure 3-4. Comparison of the HPR of the aerial PSF, the RDPSF, and the AUDPSF of a near-aplanatic grazing incidence X-ray telescope with a despaced focal plane. ......42 Figure 3-5. (a) Illustration of the HPR vs. field angle of the AUDPSF for a variety of focal plane despace values, (b) HPRfwa vs. ...
... Figure 3-4. Comparison of the HPR of the aerial PSF, the RDPSF, and the AUDPSF of a near-aplanatic grazing incidence X-ray telescope with a despaced focal plane. ......42 Figure 3-5. (a) Illustration of the HPR vs. field angle of the AUDPSF for a variety of focal plane despace values, (b) HPRfwa vs. ...
Book Describing Techniques to Detect Transiting ExoPlanets
... Not only are amateurs capable of helping in the discovery of exoplanets through collaborations with professionals, but amateurs are well-positioned to contribute to the discovery of Earth-like exoplanets and their moons! This is explained in Chapter 22. How can this be? After all, the professionals ...
... Not only are amateurs capable of helping in the discovery of exoplanets through collaborations with professionals, but amateurs are well-positioned to contribute to the discovery of Earth-like exoplanets and their moons! This is explained in Chapter 22. How can this be? After all, the professionals ...
astrometry, morphology, and polarimetry of comet donati in 1858
... for declination and right ascension, respectively. The scatter of the observations may be expressed by the standard deviations, which are 5.5″ in declination and 5.8″ in right ascension. ...
... for declination and right ascension, respectively. The scatter of the observations may be expressed by the standard deviations, which are 5.5″ in declination and 5.8″ in right ascension. ...
SPIE Astronomical Telescopes and Instrumentation Technical
... J. P. Gardner, NASA Goddard Space Flight Ctr. (United States) The scientific capabilities of the James Webb Space Telescope (JWST) fall into four themes. The End of the Dark Ages: First Light and Reionization theme seeks to identify the first luminous sources to form and to determine the ionization ...
... J. P. Gardner, NASA Goddard Space Flight Ctr. (United States) The scientific capabilities of the James Webb Space Telescope (JWST) fall into four themes. The End of the Dark Ages: First Light and Reionization theme seeks to identify the first luminous sources to form and to determine the ionization ...
8. Adaptive Optics
... An important parameter of a deformable mirror is the total and inter-actuator mechanical stroke. For OWL this strongly depends on the outer scale of turbulence L0 which reduces dramatically the amplitude of the disturbances and low spatial frequencies and therefore reduces significantly the mechani ...
... An important parameter of a deformable mirror is the total and inter-actuator mechanical stroke. For OWL this strongly depends on the outer scale of turbulence L0 which reduces dramatically the amplitude of the disturbances and low spatial frequencies and therefore reduces significantly the mechani ...
probing quasar environments with tunable filter
... formation in the universe and the impact of active galaxies on their environment. The Taurus Tunable Filter (TTF) on the Anglo-Australian Telescope provides a powerful and flexible method of performing surveys for line-emitting objects, enabling nearmonochromatic imaging over a narrow bandpass at wa ...
... formation in the universe and the impact of active galaxies on their environment. The Taurus Tunable Filter (TTF) on the Anglo-Australian Telescope provides a powerful and flexible method of performing surveys for line-emitting objects, enabling nearmonochromatic imaging over a narrow bandpass at wa ...
High-mass star-forming cloud G0.38+0.04 in the Galactic center dust
... detected – W51 North, Sgr B2 (M), and Orion KL – they closely trace the location of the high-mass YSO, likely pinpointing the base of a high-velocity outflow (Goddi et al. 2015). Cloud C, G0.38+0.04, is one of the high-column-density clouds along the central molecular zone (CMZ) dust ridge (Lis et a ...
... detected – W51 North, Sgr B2 (M), and Orion KL – they closely trace the location of the high-mass YSO, likely pinpointing the base of a high-velocity outflow (Goddi et al. 2015). Cloud C, G0.38+0.04, is one of the high-column-density clouds along the central molecular zone (CMZ) dust ridge (Lis et a ...
Critical-Angle Transmission Gratings for High Resolution, Large Area Soft X-Ray Spectroscopy
... that IXO could have fulfilled leads to demanding performance requirements for spectral resolution (small ΔE) and resolving power (large R = λ/Δλ). The x-ray band of interest for these science objectives extends over more than two orders of magnitude in energy. High quality spectroscopy over such a l ...
... that IXO could have fulfilled leads to demanding performance requirements for spectral resolution (small ΔE) and resolving power (large R = λ/Δλ). The x-ray band of interest for these science objectives extends over more than two orders of magnitude in energy. High quality spectroscopy over such a l ...
Evolution of the Milky Way with radial motions of stars and gas
... matter and rotational velocity, which also depend on the distribution of the dark matter halo). Some of those properties play an important role in determining the extent of radial displacement of stars; this is the role of the rotation curve for blurring, for example (Sect. 2.2.1). Unfortunately, de ...
... matter and rotational velocity, which also depend on the distribution of the dark matter halo). Some of those properties play an important role in determining the extent of radial displacement of stars; this is the role of the rotation curve for blurring, for example (Sect. 2.2.1). Unfortunately, de ...
Astronomical Adaptive Optics using Multiple Laser Guide Stars
... and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy Date: August 7, 2007 Dr. Michael Lloyd-Hart Date: August 7, 2007 Dr. Roger Angel Date: August 7, 2007 Dr. James Wyant Final approval and acceptance of this dissertation is contingent u ...
... and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy Date: August 7, 2007 Dr. Michael Lloyd-Hart Date: August 7, 2007 Dr. Roger Angel Date: August 7, 2007 Dr. James Wyant Final approval and acceptance of this dissertation is contingent u ...
The Formation of Population III Stars in Gas Accretion Stage: Effects
... as the initial conditions (cosmological setting or equilibrium sphere), thermal treatment (barotropic equation of state or radiative cooling) and chemical networks. Although these differences produced slight quantitative differences in the results, such as the resultant stellar mass, number of fragmen ...
... as the initial conditions (cosmological setting or equilibrium sphere), thermal treatment (barotropic equation of state or radiative cooling) and chemical networks. Although these differences produced slight quantitative differences in the results, such as the resultant stellar mass, number of fragmen ...
Properties of White Dwarfs, Teacher Guide
... 4. What is the mass of Sirius B? (10 to 15 minutes) Pick a point on the orbit of Sirius A. Put a pushpin at that point. Put another push pin at (-7,0). With a ruler, line up the two push pins. Place the third push pin where the ruler crosses the orbit of Sirius B, on the other side of the push pin a ...
... 4. What is the mass of Sirius B? (10 to 15 minutes) Pick a point on the orbit of Sirius A. Put a pushpin at that point. Put another push pin at (-7,0). With a ruler, line up the two push pins. Place the third push pin where the ruler crosses the orbit of Sirius B, on the other side of the push pin a ...
Asiago_2012_NEON_Hook
... • The primary is concave. • The secondary is either convex or concave and may be inside or beyond the prime focus. • Most common designs have the secondary acting as magnifier so that the final effective focal length is greater than that of the primary • If the primary is paraboloidal the secondary ...
... • The primary is concave. • The secondary is either convex or concave and may be inside or beyond the prime focus. • Most common designs have the secondary acting as magnifier so that the final effective focal length is greater than that of the primary • If the primary is paraboloidal the secondary ...
Stellarium User Guide
... scipting facility is Stellarium’s version of a “Presentation”, a feature that may be used to run an astronomical or other presentation for instruction or entertainment from within the Stellarium program. The original Stratoscript was quite limited in what it could do so a new Stellarium Scripting Sy ...
... scipting facility is Stellarium’s version of a “Presentation”, a feature that may be used to run an astronomical or other presentation for instruction or entertainment from within the Stellarium program. The original Stratoscript was quite limited in what it could do so a new Stellarium Scripting Sy ...
National Aeronautics and Space Administration
... This collection of activities is based on a weekly series of space science problems distributed to thousands of teachers during the 20082009 school year. They were intended for students looking for additional challenges in the math and physical science curriculum in grades 9 through 12. The problem ...
... This collection of activities is based on a weekly series of space science problems distributed to thousands of teachers during the 20082009 school year. They were intended for students looking for additional challenges in the math and physical science curriculum in grades 9 through 12. The problem ...
Word doc - Infinity Internet
... Askham, Anthony. A Lytel Treatyse of Astronomy. London: By Wylliam Powel, 1562. Aspley, John. Speculum nauticum, A looking-glass for sea-men, wherein they may behold how by a small instrument called the plain-scale all nautical questions and astronomical propositions are very easily and demonstrativ ...
... Askham, Anthony. A Lytel Treatyse of Astronomy. London: By Wylliam Powel, 1562. Aspley, John. Speculum nauticum, A looking-glass for sea-men, wherein they may behold how by a small instrument called the plain-scale all nautical questions and astronomical propositions are very easily and demonstrativ ...
Protoplanetary Disks and their Evolution
... quickly forms as more distant material with higher angular momentum falls inward. The disk will extend out to the centrifugal radius, which is expected to grow rapidly with time, R(t) ∝ Ω2 t3 , where Ω is the angular rotation rate of the core (Stahler et al. 1994). Disks should evolve rapidly, there ...
... quickly forms as more distant material with higher angular momentum falls inward. The disk will extend out to the centrifugal radius, which is expected to grow rapidly with time, R(t) ∝ Ω2 t3 , where Ω is the angular rotation rate of the core (Stahler et al. 1994). Disks should evolve rapidly, there ...
as PDF - Minnesota Academy of Science
... thirty miles in diameter,. and the tail was fifty-one millions of_ miles long, and covered an angular space of sixty degrees in the heavens. Why, that nebulous monster could have coiled himself •w~ thousand times around this earth, and still had enough of its tairleft to elevate its h~ a thousand mi ...
... thirty miles in diameter,. and the tail was fifty-one millions of_ miles long, and covered an angular space of sixty degrees in the heavens. Why, that nebulous monster could have coiled himself •w~ thousand times around this earth, and still had enough of its tairleft to elevate its h~ a thousand mi ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.