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Amanda Karakas One of the most important research fields in astrophysics is the study of the origin of the elements. ... Asymptotic Giant Blanch (AGB) Stars: For low and intermediate-mass stars (with initial masses between about 0.8 to 8 solar masses) the most important nucleosynthesis occurs when stars evolve off the main sequence to the giant branches. ... This indicates that these stars obtained their unusual abundances via mass transfer from a previous red giant star, that has long evolved away. ...

... Basics of Group Theory Definition 1. A group G is a (finite or infinite) set of elements g1 , g2 , g3 , . ... Definition 2. ... Each element of a finite group may be represented as a power or product of powers of a certain finite number of elements cal led generators of the group. ... Point Groups Any transformation which brings a body into coincidence with itself can be decomposed into elementary transformations: 1) rotation about an axis, 2) reflection in a plane, 3) translation by some vector. ...

... Supernova Remnant: Cooking Elements In The LMC . ... Credit Copyright: J. Morse ( STScI ) and NASA Explanation: Massive stars cook elements in their cores through nuclear fusion . ... It reveals luminous clouds of cooked supernova debris energized by shocks -- singly ionized sulfur appears red, doubly ionized oxygen, green, and singly ionized oxygen, blue. ... Publications with keywords: LMC - supernova remnant - supernova . Publications with words: LMC - supernova remnant - supernova . ...

The isotopic fractionation, i.e., the chemical process by which less abundant stable isotopes of elements are transferred to molecules, is still not well-understood. ... The sensitivity of sub-millimeter (ALMA, NOEMA, APEX, IRAM-30m) and IR (Spitzer, Herschel) observational facilities, and new chemical models are starting to shed light also on the fractionation of elements less abundant than H, with special attention to the possible link between this process and the evolution of the host environment. ...

... May 9, 1996 . Supernova Remnant: Cooking Elements In The LMC . Credit: J. Morse ( STScI ) and NASA . ... Starting with the light elements of hydrogen and helium, their central temperatures and pressures produce progressively heavier elements, carbon, oxygen, nitrogen, etc. up through iron. ... It reveals luminous clouds of cooked supernova debris energized by shocks -- singly ionized sulfur appears red, doubly ionized oxygen, green, and singly ionized oxygen, blue. ... About APOD | ...

The seminar is supported by the grant of Federal Programm "Integration" . ... Panov Igor Vital'evich (ITEP) "R-process nucleosynthesis of heavy elements" . The present status of r-process theory is discussed: achgievements in kinetic consideration of the process and difficulties in understanding of r-process site. ... The original model, where r-process goes on driving by neutrino pulse from collapsing supernova with mass equal to 10-15 solar masses, is discussed. ...

... Optical designers have long relied on geometric optics, or ray-tracing, to predict performance of optical instruments. ... As commonly implemented, physical optics codes unfold an optical system into a simplified linear sequence of ``thin lenses,'' which collapse the phase effects of optical elements into a plane. ... This approach accurately determines the effects of vignetting, aberrations and induced aberrations, based on the actual optical instrument geometry and prescription. ...

... Format of the orbital elements | Estimation of the extrapolation errors | Version 1" of the orbital elements collection, determined by KIAM during flight and used for operations planning . Version 2" of the of the orbital elements collection, modified by IKI during flight and recommended for the orbital calculations during scientific data processing . ... Three kinds of the INTERBALL Auroral probe (IB_AUR) orbital elements' collections are presented here. ... IKI RAN | SSC IKI RAN | ...

... Posts tagged ?data mining? ... Posted by hlee . ... Book] The Elements of Statistical Learning, 2nd Ed.? Tags: book , Brieman , cigar , Clinton , data mining , Friedman , Hastie , KDD , light curve , machine learning , SCMA , shaking hands , SN , statistical learning , Supernova , Tibshirani . ... Thanks to a Korean solar physicist [ 1 ] I was able to gather the following websites and some relevant information on Space Weather Forecast in action, not limited to literature nor toy data. ...

Next: RSOG Pre-Observation Products . ... Mission Elements . ... The main mission elements (ME) are: . The RSOG, based at ASC, which is responsible for the science operation of the RadioAstron Mission. ... The Main Ballistic(Navigation) Center (MBC) belonging to Lavochkin Association coordinates preparation and exchange of orbit determination and orbit reconstraction ptoducts. ... Experiment codes of five characters are used in naming GRT related files. ... RSOG . ... Corr (GTS?) ... Corr (RSOG?) ...

... Development of Ideas of Structure and Evolution of Stars. Integral Features of Stars, Which Determine Their Structure, Direction and Rate of Evolutuion. ... Connection between Potential and Thermal Energy of Star. ... Structure of a Main Sequence Star. Features of Massive Stars Evolution on the Main Sequence. Internal Structure of the Sun. ... White Dwarfs, Their Features. ... Evolution from the Main Sequence of Massive Stars. ... Evolution of Small Mass Stars till White Dwarfs Sequence. ...

An Ancient Universe: How Astronomers Know the Vast Scale of Cosmic Time . ... d) The Age of the Chemical Elements . ... Some isotopes (forms of the element with different numbers of neutrons in the nucleus) of these elements are radioactive; they change into other isotopes at a rate that can be measured accurately in the laboratory. ... The Ancient Universe - The Age of the Expanding Universe - The Age of the Oldest Stars - The Age of Light From Distant Galaxies - The Age of the Chemical Elements | ...

What happens to a star heavier than five solar masses? ... Stars about ten solar masses probably behave like our five solar mass star until they reach the end of core-helium burning. ... The Crab nebula was formed after a massive explosion ripped a star apart in 1054. ... Today, the glowing outer layers of the star are still rushing away from a tiny star in the centre. ... An incredible explosion rips through the outer layers of the star, releasing colossal amounts of energy in a supernova explosion. ...

M obile A stronomical Sy stem of TE lescope- R obots MASTER-II Kislovodsk Lomonosov Moscow State University, Sternberg Astronomical Institute , Moscow Union "Optic" , Kislovodsk Solar Station Latitude = 43 o љ44'.767љN; Longitude = 42 o љ31'.417љE; Altitude = 2067љm MASTERљIIљ(8љsquareљdegress) + MASTERљVWF(VeryљWideљFieldљCameras (FOV=800 square degrees, Timeљresolutionљupљtoљ150љms, with unfiltered m_lim=14m on 5 sec. exposure, and ~10.5m with 0.15 sec) . ... 11h 38m 38.0s , -09d 59m 59s) . ...

... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Constraining Stellar Interiors and Mixing via Depletion Sequences of Light Elements . ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... Lithium (Li), beryllium (Be) and boron (B), usually referred to as "the light elements", represent a powerful diagnostic for studying stellar interiors and stellar mixing. ...

... IC443 is thought to have been formed between 30,000 and 35,000 years ago, and most likely is the remains of the pulsar, G189.6+3.3. Located about 5,000 light years away, the pulsar’s X-ray emissions excite the material of the nebula, causing the chemical components to emit light in their characteristic wavelengths. ... TAK FSQ . ... FSQ: 12x30 minute subs plus 14x5 minute subs, totaling 7 hours, 20 minutes . ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Star Atlas . ... Sky Events . ... Tiny ancient galaxy preserves record of catastrophic event . New observations of Reticulum II show that heavy elements are likely left over from rare collisions between two neutron stars. ... New observations of a tiny galaxy discovered last year show that these heavy elements are likely left over from rare collisions between two neutron stars. ... Because this galaxy is so small, it preserves evidence of ancient rare events incredibly cleanly, said Simon. ...

... Figure: A dark current CCD exposure with cosmic ray events which are removed with non--linear filters. ... Figure shows a CCD dark current exposure with cosmic ray events. ... Figure: Removal of cosmic ray events on a CCD spectral exposure with different techniques: (A) original, (B) median filter, (C) recursive filter and (D) stack comparison. ... For comparison with non--linear filter techniques, Figure D shows removal of cosmic ray events from the spectral frame discussed above. ...

Permitted Context: %text . ... The <IMG> tag is used to incorporate in-line graphics (typically icons or small graphics) into an HTML document. This element is NOT intended for embedding other HTML text. ... Browsers that cannot display in-line images ignore the IMG element unless it contains the ALT attribute. ... Take values TOP or MIDDLE or BOTTOM, defining whether the top or middle or bottom of the graphic should be aligned with the baseline for the text line in which the IMG element appears. ...