Chapter 10 Late evolution of low- and intermediate
... 10.1.2 Nucleosynthesis on the AGB The main effect of thermal pulses and third dredge-up operating in AGB stars is the appearance of helium-burning products at the surface, in particular a large production of carbon. In the 3 M⊙ model shown in Fig. 10.4, the surface 12 C abundance increases after ev ...
... 10.1.2 Nucleosynthesis on the AGB The main effect of thermal pulses and third dredge-up operating in AGB stars is the appearance of helium-burning products at the surface, in particular a large production of carbon. In the 3 M⊙ model shown in Fig. 10.4, the surface 12 C abundance increases after ev ...
doc - IYPT Archive
... "light pipe" from 1840 was constructed. The main goal was to determine how intensity of transferred light and length of jet capable to transfer light depend on the shape of the jet. Experimental results are described and compared with a computer model. ...
... "light pipe" from 1840 was constructed. The main goal was to determine how intensity of transferred light and length of jet capable to transfer light depend on the shape of the jet. Experimental results are described and compared with a computer model. ...
Discovery of WASP-65b and WASP-75b: Two Hot Jupiters Without
... We report the discovery of two transiting hot Jupiters, WASP-65b (Mpl = 1.55 ± 0.16 MJ ; Rpl = 1.11 ± 0.06 RJ ), and WASP-75b (Mpl = 1.07 ± 0.05 MJ ; Rpl = 1.27 ± 0.05 RJ ). They orbit their host star every ∼2.311, and ∼2.484 days, respectively. The planet host WASP-65 is a G6 star (T eff = 5600 K, ...
... We report the discovery of two transiting hot Jupiters, WASP-65b (Mpl = 1.55 ± 0.16 MJ ; Rpl = 1.11 ± 0.06 RJ ), and WASP-75b (Mpl = 1.07 ± 0.05 MJ ; Rpl = 1.27 ± 0.05 RJ ). They orbit their host star every ∼2.311, and ∼2.484 days, respectively. The planet host WASP-65 is a G6 star (T eff = 5600 K, ...
Constellation
... do not represent real groupings of stars, astronomers still find them useful for naming stars and mapping the sky. Astronomers use letters of the Greek alphabet to name stars. They also use a form of the name of the constellation the star is in. The brightest star in a constellation has alpha in its ...
... do not represent real groupings of stars, astronomers still find them useful for naming stars and mapping the sky. Astronomers use letters of the Greek alphabet to name stars. They also use a form of the name of the constellation the star is in. The brightest star in a constellation has alpha in its ...
Effect of Macroscopic Structure in Iridescent Color
... prepared according to the conventional method (S ATOH et al., 1997). The optical reflection was characterized by the following methods. 1) The angular dependence of the reflected light intensity was measured under monochromatic light illumination by placing one end of an optical fiber on a rotating ...
... prepared according to the conventional method (S ATOH et al., 1997). The optical reflection was characterized by the following methods. 1) The angular dependence of the reflected light intensity was measured under monochromatic light illumination by placing one end of an optical fiber on a rotating ...
A Detailed Spectroscopic and Photometric Analysis of DQ White
... include 21 DQ stars. From this we exclude those objects that have carbon features only in the ultraviolet (WD 0038+555, WD 0806−661), missing or bad optical spectra (WD 1708−147, WD 2254+076), and uncertain photometric measurements (WD 2154−512). We are left with a sample of 16 DQ stars with optical ...
... include 21 DQ stars. From this we exclude those objects that have carbon features only in the ultraviolet (WD 0038+555, WD 0806−661), missing or bad optical spectra (WD 1708−147, WD 2254+076), and uncertain photometric measurements (WD 2154−512). We are left with a sample of 16 DQ stars with optical ...
GGN PUBLIC SCHOOL, LUDHIANA XII PHYSICS ASSIGNMENT
... 5. What are optical fibres? How do optical fibres transmit light without significant absorption? Discuss its one use. 6. Violet light is incident on a converging lens of focal length f. State, with reason, how the focal length of the lens will change, if violet light is replaced by red light? (decr ...
... 5. What are optical fibres? How do optical fibres transmit light without significant absorption? Discuss its one use. 6. Violet light is incident on a converging lens of focal length f. State, with reason, how the focal length of the lens will change, if violet light is replaced by red light? (decr ...
The role of neutron star mergers in the chemical evolution of the
... promising source of the r-process by Winteler et al. (2012) in the context of massive stars, and this result has been confirmed very recently by Nishimura et al. (2015). However, given the specific configuration needed by these progenitors, they are expected to be rare. On the other hand, the nucleo ...
... promising source of the r-process by Winteler et al. (2012) in the context of massive stars, and this result has been confirmed very recently by Nishimura et al. (2015). However, given the specific configuration needed by these progenitors, they are expected to be rare. On the other hand, the nucleo ...
Jeremy Heyl et al. (PDF document)
... stragglers that will evolve to become more massive WDs. Our sample has about 160 blue stragglers, and if we estimate the duration of the main-sequence for a blue straggler to be 1–2 Gyr (e.g., Sills et al. 2009), we obtain a birth-rate of bluestraggler WDs of about 0.1 Myr−1. The number of giants in ...
... stragglers that will evolve to become more massive WDs. Our sample has about 160 blue stragglers, and if we estimate the duration of the main-sequence for a blue straggler to be 1–2 Gyr (e.g., Sills et al. 2009), we obtain a birth-rate of bluestraggler WDs of about 0.1 Myr−1. The number of giants in ...
Fun Internet Resources and the Galaxy Zoo
... http://cas.sdss.org/dr5/en/proj/teachers/ – Range of grade levels ...
... http://cas.sdss.org/dr5/en/proj/teachers/ – Range of grade levels ...
![[C ii] 157 μm Emission in a Five-component Interstellar](http://s1.studyres.com/store/data/019898103_1-04a729a979ed8700f387bc0fbfcce724-300x300.png)
or view
... Observations during the 18th century showed that light from the star Spica decreased abruptly during occultations by the Moon. It was concluded that the Moon has no atmosphere because, otherwise, refraction would have produced a progressive dimming of the star. The SPICAM acronym is a tribute to thi ...
... Observations during the 18th century showed that light from the star Spica decreased abruptly during occultations by the Moon. It was concluded that the Moon has no atmosphere because, otherwise, refraction would have produced a progressive dimming of the star. The SPICAM acronym is a tribute to thi ...
Star Formation and Young Clusters in Cygnus
... its synchrotron radiation (rose) and in the lower left corner, the smaller source G84.20.8 (Uyaniker et al. 2003) is located close to the North America Nebula. Recently, Butt et al. (2003) detected a supernova-remnant-like structure in VLA 4.86 GHz data close to the center of Cyg OB2 and suggested t ...
... its synchrotron radiation (rose) and in the lower left corner, the smaller source G84.20.8 (Uyaniker et al. 2003) is located close to the North America Nebula. Recently, Butt et al. (2003) detected a supernova-remnant-like structure in VLA 4.86 GHz data close to the center of Cyg OB2 and suggested t ...
Lecture 6: Waves Review and Examples PLEASE REVIEW ON
... Suppose that when we pass red light (λ = 600 nm) through a slit of unknown width a, the width of the spot (the distance between the first zeros on each side of the bright peak) is W = 1 cm on a screen that is L = 2 m behind the slit. How wide is the slit? ...
... Suppose that when we pass red light (λ = 600 nm) through a slit of unknown width a, the width of the spot (the distance between the first zeros on each side of the bright peak) is W = 1 cm on a screen that is L = 2 m behind the slit. How wide is the slit? ...
PPT
... where f is the phase between adjacent slits. q = 0, /d, 2/d, ... The intensity at the peak of a principal maximum goes as N2. 3 slits: Atot = 3A1 Itot = 9I1. N slits: IN = N2I1. ...
... where f is the phase between adjacent slits. q = 0, /d, 2/d, ... The intensity at the peak of a principal maximum goes as N2. 3 slits: Atot = 3A1 Itot = 9I1. N slits: IN = N2I1. ...
The First Galaxies: Assembly under Radiative Feedback from the
... in the IGM impedes the accretion of gas onto these low-mass halos, an effect known as Jeans-filtering (e.g., Shapiro et al. 1994; Gnedin & Hui 1998; Okamoto et al. 2008). In contrast, star formation inside the first dwarf galaxies should be more robust to this negative radiative feedback as their de ...
... in the IGM impedes the accretion of gas onto these low-mass halos, an effect known as Jeans-filtering (e.g., Shapiro et al. 1994; Gnedin & Hui 1998; Okamoto et al. 2008). In contrast, star formation inside the first dwarf galaxies should be more robust to this negative radiative feedback as their de ...
Paper
... Fermi’s Golden Rule. Thus, it can be rigorously shown that the total q line shift remains 4n 0 U/7h, while the rms-width ∆ν = ∆νn2 + ∆ν2p is the quadrature sum of the mean-field and the Doppler widths [11]. In our experiment a weak laser beam, with a frequency of 1.7 GHz red-detuned from the sodium ...
... Fermi’s Golden Rule. Thus, it can be rigorously shown that the total q line shift remains 4n 0 U/7h, while the rms-width ∆ν = ∆νn2 + ∆ν2p is the quadrature sum of the mean-field and the Doppler widths [11]. In our experiment a weak laser beam, with a frequency of 1.7 GHz red-detuned from the sodium ...
doc - Pocket Stars
... view the entire solar system and background stars and constellations from any point in the solar system. In 3D mode, drag the screen to rotate the entire solar system. The zoom controls are used to set the viewing distance from the sun. ...
... view the entire solar system and background stars and constellations from any point in the solar system. In 3D mode, drag the screen to rotate the entire solar system. The zoom controls are used to set the viewing distance from the sun. ...
Shockingly Bright Pulsar - Astronomical Society of the Pacific
... holes up to a few hundred solar masses--accreting matter that heated and emitted Xrays in large quantities. •Now, astronomers have to explain how a stellar-mass pulsar can act as extremely as a black hole. ...
... holes up to a few hundred solar masses--accreting matter that heated and emitted Xrays in large quantities. •Now, astronomers have to explain how a stellar-mass pulsar can act as extremely as a black hole. ...
Experiment 24 - School of Physics
... Figure 24-1 shows the layout of the Michelson interferometer used in this experiment. The mirrors, beamsplitter and compensator plate are mounted on a marble slab for stability. The apparatus is housed in a clear plastic box to exclude drafts and to keep the optics clean. Light from the source is sp ...
... Figure 24-1 shows the layout of the Michelson interferometer used in this experiment. The mirrors, beamsplitter and compensator plate are mounted on a marble slab for stability. The apparatus is housed in a clear plastic box to exclude drafts and to keep the optics clean. Light from the source is sp ...
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.