Atoms, Einstein, Universe
... meticulous study of starlight. Everything astronomers know about the cosmos comes from observing starlight. It’s amazing how much we can learn from the charming twinkle of stars. From the array of “colors” in starlight, astronomers can precisely measure what stars are made of. From changes in these ...
... meticulous study of starlight. Everything astronomers know about the cosmos comes from observing starlight. It’s amazing how much we can learn from the charming twinkle of stars. From the array of “colors” in starlight, astronomers can precisely measure what stars are made of. From changes in these ...
The Physics of Massive Star Formation
... Dust absorbs UV & visible, re-radiates IR Dust sublimes at T ~ 1200 K, r ~ 30 AU Radiation > gravity for ...
... Dust absorbs UV & visible, re-radiates IR Dust sublimes at T ~ 1200 K, r ~ 30 AU Radiation > gravity for ...
Soft-x-ray interferometer for single-shot laser linewidth measurements
... experiments were conducted in the near-IR region of the spectrum by use of a vertical-cavity surfaceemitting laser diode,14 which could be adjusted to emit in two modes of similar amplitude. Using standard 1-in. s2.54 cmd gratings of 600 groovesymm made it possible to measure the spectral separation ...
... experiments were conducted in the near-IR region of the spectrum by use of a vertical-cavity surfaceemitting laser diode,14 which could be adjusted to emit in two modes of similar amplitude. Using standard 1-in. s2.54 cmd gratings of 600 groovesymm made it possible to measure the spectral separation ...
Discovery of the optical counterpart to the X
... This kind of diagrams have been successfully used to identify optical counterparts in the Magellanic Clouds (Grebel 1997; Stevens et al. 1999). Of the approximately 80 stars that were analysed in the ∼ 8′ × 8′ field of view of the 1.3 m telescope about 8 were bright enough in Hα to call our attentio ...
... This kind of diagrams have been successfully used to identify optical counterparts in the Magellanic Clouds (Grebel 1997; Stevens et al. 1999). Of the approximately 80 stars that were analysed in the ∼ 8′ × 8′ field of view of the 1.3 m telescope about 8 were bright enough in Hα to call our attentio ...
Rotation - Indiana University Astronomy
... Alternative magnetic field indicators: collimated jets and energetic winds – Jets and winds are likely launched from the disk-magnetosphere boundary – Such winds are ubiquitous among low mass (M < 2 Msun) accreting PMS stars – Direct evidence of jets found among accreting stars as massive as M ~ 10 ...
... Alternative magnetic field indicators: collimated jets and energetic winds – Jets and winds are likely launched from the disk-magnetosphere boundary – Such winds are ubiquitous among low mass (M < 2 Msun) accreting PMS stars – Direct evidence of jets found among accreting stars as massive as M ~ 10 ...
Jeopardy - ScienceWhiz
... Solar flares are violent eruptions of particles/radiation while prominences are arcs of gas ejected from the chromospheres/condenses in corona and comes back to surface. ...
... Solar flares are violent eruptions of particles/radiation while prominences are arcs of gas ejected from the chromospheres/condenses in corona and comes back to surface. ...
Lecture 12
... There is an upper limit to the mass of a white dwarf - we do not see WDs with masses > 1.4 M We will see in next lectures what the implications of this are for other phenomena in the Universe. It actually led to the discovery of dark energy! The collapse of massive stars produces two types of remna ...
... There is an upper limit to the mass of a white dwarf - we do not see WDs with masses > 1.4 M We will see in next lectures what the implications of this are for other phenomena in the Universe. It actually led to the discovery of dark energy! The collapse of massive stars produces two types of remna ...
powerpoint - High Energy Physics at Wayne State
... Sun spews out charged particles, called the solar wind. The solar wind travels along solar magnetic field lines extending radially outward from the Sun. UV sunlight ionizes gases in the coma. These ions (charged particles) are pushed by solar wind particles along magnetic field lines to form the ion ...
... Sun spews out charged particles, called the solar wind. The solar wind travels along solar magnetic field lines extending radially outward from the Sun. UV sunlight ionizes gases in the coma. These ions (charged particles) are pushed by solar wind particles along magnetic field lines to form the ion ...
CBP's Powerpoint template for scientific posters
... electrons, in other words, of ionised gas. This can have two natural origins: a lower density of the thermal gas itself, or a lower flux of ionising photons from the vicinity of the central accretion disk. In addition, these two factors may be correlated (for example, the amount of thermal gas prese ...
... electrons, in other words, of ionised gas. This can have two natural origins: a lower density of the thermal gas itself, or a lower flux of ionising photons from the vicinity of the central accretion disk. In addition, these two factors may be correlated (for example, the amount of thermal gas prese ...
1 Sun Stars Planets. Problem Sheet I
... increase or decrease. (c) The incoming solar radiation flux incident on the Earth, averaged over time, is 342 W m−2 . Show how this can be derived from the above value of the solar constant. It is estimated that on average 77 W m−2 is reflected back by clouds and other atmospheric constituents, and ...
... increase or decrease. (c) The incoming solar radiation flux incident on the Earth, averaged over time, is 342 W m−2 . Show how this can be derived from the above value of the solar constant. It is estimated that on average 77 W m−2 is reflected back by clouds and other atmospheric constituents, and ...
stars - acpsd
... emitting ultraviolet radiation. This emission of ultraviolet radiation ionizes the ejected gases, giving them a glow known as a planetary nebula. ...
... emitting ultraviolet radiation. This emission of ultraviolet radiation ionizes the ejected gases, giving them a glow known as a planetary nebula. ...
Question bank Physics Part1 (Updated 9-July-12)
... 38. A Fresnel’s bi-prism arrangement is set with sodium light ( λ=5893Ǻ) & in the field of view of the eyepiece , sixty two fringes are observed. How many fringes shall we get in the same field of a Hg lamp using green filter passing light of wavelength λ = 5461 Ǻ . 39. Fresnel’s biprism fringes ar ...
... 38. A Fresnel’s bi-prism arrangement is set with sodium light ( λ=5893Ǻ) & in the field of view of the eyepiece , sixty two fringes are observed. How many fringes shall we get in the same field of a Hg lamp using green filter passing light of wavelength λ = 5461 Ǻ . 39. Fresnel’s biprism fringes ar ...
1.3 Lifecycle of stars
... Evolution of a Sun-Like Star The helium flash: The pressure within the helium core is almost totally due to “electron degeneracy”—two electrons cannot be in the same quantum state, so the core cannot contract beyond a certain point. This pressure is almost independent of temperature— when the heliu ...
... Evolution of a Sun-Like Star The helium flash: The pressure within the helium core is almost totally due to “electron degeneracy”—two electrons cannot be in the same quantum state, so the core cannot contract beyond a certain point. This pressure is almost independent of temperature— when the heliu ...
T. Thompson, Jan 2007
... – Because from secondary electrons/positrons, another process (not synchrotron) must dominate CR electron cooling. ...
... – Because from secondary electrons/positrons, another process (not synchrotron) must dominate CR electron cooling. ...
P7 Higher mark scheme - Corby Technical School
... Functional Skills, Key Skills, Entry Level qualifications, NVQs and vocational qualifications in areas such as IT, business, languages, teaching/training, administration and secretarial skills. It is also responsible for developing new specifications to meet national requirements and the needs of st ...
... Functional Skills, Key Skills, Entry Level qualifications, NVQs and vocational qualifications in areas such as IT, business, languages, teaching/training, administration and secretarial skills. It is also responsible for developing new specifications to meet national requirements and the needs of st ...
iaf2001_paper (doc - 1.8 MB)
... As second objective, COROT will be able to detect the presence of extra-solar planets when they transit. The detectors are 4 CCD 2048x2048 pixels with a field of view of 8°2. Half is dedicated to the extra-solar planets program. By adapting both the integration time and the focus conditions, but wit ...
... As second objective, COROT will be able to detect the presence of extra-solar planets when they transit. The detectors are 4 CCD 2048x2048 pixels with a field of view of 8°2. Half is dedicated to the extra-solar planets program. By adapting both the integration time and the focus conditions, but wit ...
bringing pulsating stars into the physics classroom
... (This means that the result will only be valid for smallamplitude oscillations.) For example, the pressure P would be written as P = P◦ + δP , where P◦ is the value of the pressure within a mass shell of the equilibrium model, and δP is the small change in pressure that occurs as that mass shell mov ...
... (This means that the result will only be valid for smallamplitude oscillations.) For example, the pressure P would be written as P = P◦ + δP , where P◦ is the value of the pressure within a mass shell of the equilibrium model, and δP is the small change in pressure that occurs as that mass shell mov ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.