X-Ray Binaries
... expands when losing mass rapidly; Roche lobe shrinks) → companion star cannot accrete all the transferred matter and is engulfed → formation of a common envelope (CE) → friction → spiral-in . CE is ejected when CE ∆Eorb > Ebind, where ∆Eorb is the orbital energy released, Ebind the binding energy of ...
... expands when losing mass rapidly; Roche lobe shrinks) → companion star cannot accrete all the transferred matter and is engulfed → formation of a common envelope (CE) → friction → spiral-in . CE is ejected when CE ∆Eorb > Ebind, where ∆Eorb is the orbital energy released, Ebind the binding energy of ...
STELLAR SPECTRA A. Basic Line Formation
... the infrared. Some Balmer lines are present in the stellar spectrograms in Figure 5. The solar Balmer α line (usually called Hα) is shown in Figure 9. From Novotny (1973). ...
... the infrared. Some Balmer lines are present in the stellar spectrograms in Figure 5. The solar Balmer α line (usually called Hα) is shown in Figure 9. From Novotny (1973). ...
Does Transparent Hidden Matter Generate Optical Scintillation?
... • Average mass column density towards LMC 250g/m2 or a column of 3m H2 (normal P and T) Clouds cover 1% of sky => concentration of 100 ...
... • Average mass column density towards LMC 250g/m2 or a column of 3m H2 (normal P and T) Clouds cover 1% of sky => concentration of 100 ...
to get the file
... the Celestron, but we could not track many of the stars on our bright star list due to the fact that they either rose ...
... the Celestron, but we could not track many of the stars on our bright star list due to the fact that they either rose ...
Powerpoint of lecture 16
... radius • Shell radius ‘wants’ to be constant • But core inside it is contracting • This requires the envelope to expand, to compensate – star becomes a giant ...
... radius • Shell radius ‘wants’ to be constant • But core inside it is contracting • This requires the envelope to expand, to compensate – star becomes a giant ...
PPT presentation
... Although the available data are scarce, no obvious correlations of CS properties (mass, evolutionary state) with morphology of the host PN have emerged. ...
... Although the available data are scarce, no obvious correlations of CS properties (mass, evolutionary state) with morphology of the host PN have emerged. ...
Notebook and Assignment Guidelines
... line, as shown in the diagram at left. These lines show the locations where crests in the two wave patterns will overlap, producing bright spots of light. 4. To see what an interference pattern will look like when viewed on a wall or “screen,” place a piece of scratch paper across the semicircle tra ...
... line, as shown in the diagram at left. These lines show the locations where crests in the two wave patterns will overlap, producing bright spots of light. 4. To see what an interference pattern will look like when viewed on a wall or “screen,” place a piece of scratch paper across the semicircle tra ...
Chemical tagging of three distinct populations of red giants in the
... A check with spectrum synthesis confirmed the reliability of our measurements. We use here LTE abundances. Andrievsky et al. (2008) computed N-LTE corrections for Al for very metal-poor stars, considering also the doublet used here. From their Fig. 2 the maximun differential effect for stars with te ...
... A check with spectrum synthesis confirmed the reliability of our measurements. We use here LTE abundances. Andrievsky et al. (2008) computed N-LTE corrections for Al for very metal-poor stars, considering also the doublet used here. From their Fig. 2 the maximun differential effect for stars with te ...
Photoacoustics Spectroscopy
... Introduction The photoacoustic (PA) or optoacoustic (OA) effect, i.e. the generation of acoustic waves due to the absorption of modulated electromagnetic waves, is an old effect, discovered by Bell in ...
... Introduction The photoacoustic (PA) or optoacoustic (OA) effect, i.e. the generation of acoustic waves due to the absorption of modulated electromagnetic waves, is an old effect, discovered by Bell in ...
J. Spigulis. Side-emitting optical fibers brighten our world in new
... There have been a number of reports, in the scientific literature and on the Internet, describing fibers that side-emit luminescent light under ultraviolet or visible illumination. Most such fibers are plastic. For example, many are made from polystyrene with specific fluorescent dyes surrounded by a cle ...
... There have been a number of reports, in the scientific literature and on the Internet, describing fibers that side-emit luminescent light under ultraviolet or visible illumination. Most such fibers are plastic. For example, many are made from polystyrene with specific fluorescent dyes surrounded by a cle ...
Triple Refraction_and_Total_Internal_Reflection
... 5. Is some of the wave energy reflected as well as refracted? Yes, some of the wave energy reflects (bounces) off the boundary as well as being refracted (changing direction at the boundary.) ...
... 5. Is some of the wave energy reflected as well as refracted? Yes, some of the wave energy reflects (bounces) off the boundary as well as being refracted (changing direction at the boundary.) ...
Determining the Cepheid Period–Luminosity Relation Using
... For all our fits we disregard the phase interval between 0.8 and 1.0 where the star is contracting and the stellar atmospheres often exhibit signs of shocks (emission lines in the spectra) which can affect the angular diameter measurements. In the lower panel of Figure 1 the angular diameter is sho ...
... For all our fits we disregard the phase interval between 0.8 and 1.0 where the star is contracting and the stellar atmospheres often exhibit signs of shocks (emission lines in the spectra) which can affect the angular diameter measurements. In the lower panel of Figure 1 the angular diameter is sho ...
Chapter 10
... • Asteroids are small, generally rocky bodies that orbit Sun • Most asteroids (thousands) lie in the asteroid belt, a region between the orbits of Mars and Jupiter • The first asteroid (Ceres) of this asteroid belt swarm was discovered as a result of a search for the “missing planet” of Bode’s law • ...
... • Asteroids are small, generally rocky bodies that orbit Sun • Most asteroids (thousands) lie in the asteroid belt, a region between the orbits of Mars and Jupiter • The first asteroid (Ceres) of this asteroid belt swarm was discovered as a result of a search for the “missing planet” of Bode’s law • ...
Abundance Anomalies In Tidal Disruption Events
... mass, the IMF, and the number of stars available at the mass given the star formation history. Figure 4 also shows the scaling of TDE rates with stellar mass given these assumptions and three possible star formation histories: an old burst of star formation, continuous star formation and a recent bu ...
... mass, the IMF, and the number of stars available at the mass given the star formation history. Figure 4 also shows the scaling of TDE rates with stellar mass given these assumptions and three possible star formation histories: an old burst of star formation, continuous star formation and a recent bu ...
Pounds K. - X-ray Astronomy and Cosmology group group
... 20 and 40MHz transmitters powered by battery bleep bleep lasted for only 21 days - but shook the world rocket case visible for several months and orbit decay used to study atmospheric density ...
... 20 and 40MHz transmitters powered by battery bleep bleep lasted for only 21 days - but shook the world rocket case visible for several months and orbit decay used to study atmospheric density ...
Origin of the Elements
... the helium begins fusing into carbon (C) at its core, but hydrogen continues to form helium in a thin ...
... the helium begins fusing into carbon (C) at its core, but hydrogen continues to form helium in a thin ...
File - Science Website
... Describe, in as much detail as you can, what forces allow a stable star to exist and how the star may eventually form a black hole. To gain full marks in this question you should write your ideas in good English. Put them into a sensible order and use the correct scientific words. ...
... Describe, in as much detail as you can, what forces allow a stable star to exist and how the star may eventually form a black hole. To gain full marks in this question you should write your ideas in good English. Put them into a sensible order and use the correct scientific words. ...
Infrared Vibration-Rotation Spectroscopy of HCl and DCl
... where mA and mB are the isotopic masses of atoms A and B. The probability of a change in a particular state of a molecule is dictated by quantum mechanical constraints known as selection rules. For instance, the selection rule for diatomic molecule rotational transitions allows state changes in whic ...
... where mA and mB are the isotopic masses of atoms A and B. The probability of a change in a particular state of a molecule is dictated by quantum mechanical constraints known as selection rules. For instance, the selection rule for diatomic molecule rotational transitions allows state changes in whic ...
Star formation PowerPoint
... 19.2 The Formation of Stars Like the Sun Planetary formation has begun, but the protostar is still not in equilibrium—all heating comes from the gravitational collapse. ...
... 19.2 The Formation of Stars Like the Sun Planetary formation has begun, but the protostar is still not in equilibrium—all heating comes from the gravitational collapse. ...
Cosmological Applications of Gravitational Lensing
... Microlensing constraints on quasar size, because the flux variation is significant only if angular size of source is less than Einstein radius of lens. Q2237+030 (Einstein cross) first direct estimate of quasar size Size < 1010 km, but inconsistent with accretion disk model (nonthermal compon ...
... Microlensing constraints on quasar size, because the flux variation is significant only if angular size of source is less than Einstein radius of lens. Q2237+030 (Einstein cross) first direct estimate of quasar size Size < 1010 km, but inconsistent with accretion disk model (nonthermal compon ...
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.