ASTRONOMY AND ASTROPHYSICS Barium and europium
... scatter that indicates r-process dominated nucleosynthesis at times of formation not only of the halo but also of the thick disk stellar population. The fraction of the s- and r-process in producing heavy elements can be evaluated by another method, from an analysis of the hyperfine structure (HFS) ...
... scatter that indicates r-process dominated nucleosynthesis at times of formation not only of the halo but also of the thick disk stellar population. The fraction of the s- and r-process in producing heavy elements can be evaluated by another method, from an analysis of the hyperfine structure (HFS) ...
THE PRIMORDIAL HELIUM ABUNDANCE Manuel Peimbert
... The discovery of the fossil or cosmic microwave background radiation (CMB) in 1965 gave new impetus and support to the BBT and led Peebles (14) to produce a new set of computations of the nuclear reactions that take place during the big bang with a higher precision than before. He assumed two neutr ...
... The discovery of the fossil or cosmic microwave background radiation (CMB) in 1965 gave new impetus and support to the BBT and led Peebles (14) to produce a new set of computations of the nuclear reactions that take place during the big bang with a higher precision than before. He assumed two neutr ...
Evolution of stars
... d. stronger. e. b and c The most common stars are a. supergiants. b. giants. c. upper main sequence stars. d. white dwarfs. e. lower main sequence stars. The __________ of a star is a measure of the total energy radiated by the star in one second. a. absolute visual magnitude b. apparent visual magn ...
... d. stronger. e. b and c The most common stars are a. supergiants. b. giants. c. upper main sequence stars. d. white dwarfs. e. lower main sequence stars. The __________ of a star is a measure of the total energy radiated by the star in one second. a. absolute visual magnitude b. apparent visual magn ...
SciPoster_Jan2009
... Dust is found everywhere in the universe. It is in our houses and in large areas of our Galaxy and the Universe, dating all the way back to nearly the beginning of time (e.g., Yan et al. 2005). This dust was formed initially from massive short-lived stars such as Cassiopeia A (e.g., Rho 2008). Dust ...
... Dust is found everywhere in the universe. It is in our houses and in large areas of our Galaxy and the Universe, dating all the way back to nearly the beginning of time (e.g., Yan et al. 2005). This dust was formed initially from massive short-lived stars such as Cassiopeia A (e.g., Rho 2008). Dust ...
Astrometry of Asteroids
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
Astrometry of Asteroids
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
Astrometry of Asteroids
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
Astrometry of Asteroids
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
... contains only 3522 stars, all of them rather bright. The right ascension and declination of the stars in the FK5 Catalog have been especially carefully measured and re-measured so that they can be relied upon as standard reference points for the measurement of the positions of other objects in the s ...
Astrometry of Asteroids
... mathematics for you, and the program we supply does just that. To measure a unknown object’s position from an image, the software will instruct you to choose at least three stars of known coordinates (for best results choose more). Then indicate the location of the unknown object by clicking on it. ...
... mathematics for you, and the program we supply does just that. To measure a unknown object’s position from an image, the software will instruct you to choose at least three stars of known coordinates (for best results choose more). Then indicate the location of the unknown object by clicking on it. ...
Spectral Matching for Elemental Abundances of Evolved Stars of Globular Clusters
... A 7.1 magnitude earthquake on September 4, 2010 that shut down the university for 2 weeks A 6.3 magnitude earthquake on February 21, 2011 that shut down the university for 6 weeks Another 6.3 magnitude earthquake on June 13, 2011 that shut down the university for 1 week Over 11,000 other earthquakes ...
... A 7.1 magnitude earthquake on September 4, 2010 that shut down the university for 2 weeks A 6.3 magnitude earthquake on February 21, 2011 that shut down the university for 6 weeks Another 6.3 magnitude earthquake on June 13, 2011 that shut down the university for 1 week Over 11,000 other earthquakes ...
Supernovae and Gamma-Ray Bursts (draft)
... by this interaction with the circumstellar material. Supernovae (e.g., § 8.3) that show evidence for such interactions are sometimes referred to as Type IIa supernovae (SNe IIa), though how this fits into the overall supernova scheme and, in particular, its relation to SNe IIb devies any obvious log ...
... by this interaction with the circumstellar material. Supernovae (e.g., § 8.3) that show evidence for such interactions are sometimes referred to as Type IIa supernovae (SNe IIa), though how this fits into the overall supernova scheme and, in particular, its relation to SNe IIb devies any obvious log ...
Zapartas_deMink_Izzard_AA_2017
... through mass transfer or merging. We undertake a population synthesis study to compute the delay-time distribution of core-collapse supernovae, that is, the supernova rate versus time following a starburst, taking into account binary interactions. We test the systematic robustness of our results by ...
... through mass transfer or merging. We undertake a population synthesis study to compute the delay-time distribution of core-collapse supernovae, that is, the supernova rate versus time following a starburst, taking into account binary interactions. We test the systematic robustness of our results by ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.