Planetary Nebula
... Rotten Egg Nebula The object shown in this Hubble image is a remarkable example of a star going through death throes just as it dramatically transforms itself from a normal red giant star into a planetary nebula. This process happens so quickly that such objects are quite rare, even though astronome ...
... Rotten Egg Nebula The object shown in this Hubble image is a remarkable example of a star going through death throes just as it dramatically transforms itself from a normal red giant star into a planetary nebula. This process happens so quickly that such objects are quite rare, even though astronome ...
Experiment Guide - Industrial Fiber Optics
... To a casual observer, light in the world around us seems to travel in a straight line. The appearance of shadows and reflections in mirrors seems to support this conclusion. The behavior of light in these instances can be explained with ordinary geometry. Light is either reflected, absorbed, scatter ...
... To a casual observer, light in the world around us seems to travel in a straight line. The appearance of shadows and reflections in mirrors seems to support this conclusion. The behavior of light in these instances can be explained with ordinary geometry. Light is either reflected, absorbed, scatter ...
starry night companion
... spend some time using Starry Night and making their own observations, before returning to the rest of this book. The next four sections go into more detail. Section two will help you get the most out of your observing, no matter what you are looking at. It has observational tips, hints on choosing b ...
... spend some time using Starry Night and making their own observations, before returning to the rest of this book. The next four sections go into more detail. Section two will help you get the most out of your observing, no matter what you are looking at. It has observational tips, hints on choosing b ...
Extrasolar Kuiper Belt Dust Disks
... (Backman and Paresce, 1993). Because all the above timescales are generally much shorter than the age of the disk, it is inferred that the observed dust is not primordial but is likely produced by a reservoir of undetected kilometersized planetesimals producing dust by mutual collisions or by evapor ...
... (Backman and Paresce, 1993). Because all the above timescales are generally much shorter than the age of the disk, it is inferred that the observed dust is not primordial but is likely produced by a reservoir of undetected kilometersized planetesimals producing dust by mutual collisions or by evapor ...
The Stars - Springer
... November 1. Similarly, it will transit on February 1 at approximately 10.00 p.m., and on March 1 at about 8.00 p.m. ...
... November 1. Similarly, it will transit on February 1 at approximately 10.00 p.m., and on March 1 at about 8.00 p.m. ...
The double-pulsar PSR J0737−3039A/B
... makes J0737−3039A’s orbit the tightest among those of all known binary pulsars in eccentric systems. The pulsar mass function was calculated and resulted 0.29 M . A strong constraint on the nature of PSR J0737−3039A companion came few days later from the first fit of a binary model to the times of ...
... makes J0737−3039A’s orbit the tightest among those of all known binary pulsars in eccentric systems. The pulsar mass function was calculated and resulted 0.29 M . A strong constraint on the nature of PSR J0737−3039A companion came few days later from the first fit of a binary model to the times of ...
Feedback from winds and supernovae in massive stellar clusters – I
... Published by Oxford University Press on behalf of the Royal Astronomical Society ...
... Published by Oxford University Press on behalf of the Royal Astronomical Society ...
Cepheids
... HIPPARCOS catalogue and the distance to the LMC” (A&A V.356, P.849, 2000) • A.Sandage et al. “The Hubble constant: a summary of the HST program for the luminosity calibration of type Ia SuperNovae by means of Cepheids” (ApJ V.653, P.843, 2006) • F.van Leeuwen et al. “Cepheid parallaxes and the Hubbl ...
... HIPPARCOS catalogue and the distance to the LMC” (A&A V.356, P.849, 2000) • A.Sandage et al. “The Hubble constant: a summary of the HST program for the luminosity calibration of type Ia SuperNovae by means of Cepheids” (ApJ V.653, P.843, 2006) • F.van Leeuwen et al. “Cepheid parallaxes and the Hubbl ...
Full Article PDF - Advanced Materials Letters
... emission from ZnO nanorods is well known to be the most efficient when the excitation light is polarized along the axial direction of the nanorods [10, 11]. As an abundant and low cost optical material, synthesis of functional ZnO nanoproduct with predictable rational strategies is a key for the de ...
... emission from ZnO nanorods is well known to be the most efficient when the excitation light is polarized along the axial direction of the nanorods [10, 11]. As an abundant and low cost optical material, synthesis of functional ZnO nanoproduct with predictable rational strategies is a key for the de ...
ertan et al 11cesme
... For Tp = 100 K, the Lx cutoff puts an upper limit to the observable periods of AXP/SGRs. For the sources with weaker magnetic dipole fields, rin comes out of the light cylinder earlier than it does for the sources with stronger dipole fields. After this point, P remains almost constant because of d ...
... For Tp = 100 K, the Lx cutoff puts an upper limit to the observable periods of AXP/SGRs. For the sources with weaker magnetic dipole fields, rin comes out of the light cylinder earlier than it does for the sources with stronger dipole fields. After this point, P remains almost constant because of d ...
Former PARI students shine at AAS PARI Calendar
... material dating from the original formation of the solar system. What a boon it would be for cosmologists to be able to determine what they are composed of. While astronomers can observe comets with telescopes and even determine some things about their compositions by using spectral imaging of the g ...
... material dating from the original formation of the solar system. What a boon it would be for cosmologists to be able to determine what they are composed of. While astronomers can observe comets with telescopes and even determine some things about their compositions by using spectral imaging of the g ...
D12 in docx
... lithography. A red laser focus exposes the photoresist, while a green laser depletes (or de-excites or “erases”) from all sides using a bottle beam. (b) Foci measured by scanning a gold bead through the focus in three dimensions. Taken from Ref.[D12:5]. ...
... lithography. A red laser focus exposes the photoresist, while a green laser depletes (or de-excites or “erases”) from all sides using a bottle beam. (b) Foci measured by scanning a gold bead through the focus in three dimensions. Taken from Ref.[D12:5]. ...
The occurrence of nitrogen-enhanced metal
... based on AGB models in which low-mass stars (0.8–1.5 M ) at [Fe/H] < −2.5 produce carbon and s-elements by dual shell flashes (see Sect. 5 for details). While this increases the parameter space for making CEMP-s stars considerably, it is barely sufficient to produce a CEMP-s fraction of more than 10% ...
... based on AGB models in which low-mass stars (0.8–1.5 M ) at [Fe/H] < −2.5 produce carbon and s-elements by dual shell flashes (see Sect. 5 for details). While this increases the parameter space for making CEMP-s stars considerably, it is barely sufficient to produce a CEMP-s fraction of more than 10% ...
Interacting supernovae from photoionization
... number density along a line of sight) and Doppler-shifted nebular spectral lines. Such a nebula has been detected for the red supergiant W 269,12, but it will be orders of magnitude fainter around Betelgeuse because the latter’s wind has much lower density. The only imaging detections of Betelgeuse’ ...
... number density along a line of sight) and Doppler-shifted nebular spectral lines. Such a nebula has been detected for the red supergiant W 269,12, but it will be orders of magnitude fainter around Betelgeuse because the latter’s wind has much lower density. The only imaging detections of Betelgeuse’ ...
Optics - Filter Properties & manipulation of light in flow cytometry
... outside the pass band, most interference filters incorporate some absorptive elements as well as dielectric layers ...
... outside the pass band, most interference filters incorporate some absorptive elements as well as dielectric layers ...
Optical phase measurement emphasized
... change upon total internal reflection, which is revealed by modification of the polarization state. One can send a laser beam to a prism such that light is polarized at 45° with the horizontal. If we place and rotate a polarizer in the path of the beam right before the beam enters into the prism, we ...
... change upon total internal reflection, which is revealed by modification of the polarization state. One can send a laser beam to a prism such that light is polarized at 45° with the horizontal. If we place and rotate a polarizer in the path of the beam right before the beam enters into the prism, we ...
The extinction map of the OMC-1 molecular cloud behind the Orion
... Methods. The most recent near-infrared catalog of stars is used to study the distribution of reddening across a 0.3 deg2 area covering the Orion nebula cluster. On the basis of the observed (H, H − KS ) diagram, we establish a criterion for disentangling contaminants from bona-fide cluster members. ...
... Methods. The most recent near-infrared catalog of stars is used to study the distribution of reddening across a 0.3 deg2 area covering the Orion nebula cluster. On the basis of the observed (H, H − KS ) diagram, we establish a criterion for disentangling contaminants from bona-fide cluster members. ...
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.