Astronomy Astrophysics Gaia-ESO Survey: The analysis of high-resolution The
... E(B − V). The targets selected before April 2012 had a brightest cut on J = 11 instead of 12. When there were not enough targets, the red edge was extended. When there were too many potential targets an algorithm selected roughly the same number of stars per magnitude bin with the rest being marked ...
... E(B − V). The targets selected before April 2012 had a brightest cut on J = 11 instead of 12. When there were not enough targets, the red edge was extended. When there were too many potential targets an algorithm selected roughly the same number of stars per magnitude bin with the rest being marked ...
A Revised DDO Abundance Calibration for Population I Red Giants
... Galactic disk, but also to the more metal-poor stars of the old disk having [Fe/H] between – 0.3 and – 0.8. There are at least three reasons to justify embarking on a new DDO abundance calibration for population IG and Κ giants. First of all, the sample of field and open cluster red giants with abun ...
... Galactic disk, but also to the more metal-poor stars of the old disk having [Fe/H] between – 0.3 and – 0.8. There are at least three reasons to justify embarking on a new DDO abundance calibration for population IG and Κ giants. First of all, the sample of field and open cluster red giants with abun ...
Lichtenknecker- Database of the BAV
... The criteria for an inclusion of eclipsing binaries into the database are a magnitude not fainter than 13mag during maximum light and a declination north of –20 degree. There is no limit regarding the amplitude of the change of light or period. Due to the increasing use of CCD-cameras in the recent ...
... The criteria for an inclusion of eclipsing binaries into the database are a magnitude not fainter than 13mag during maximum light and a declination north of –20 degree. There is no limit regarding the amplitude of the change of light or period. Due to the increasing use of CCD-cameras in the recent ...
Abstract The Star Formation History of Low Surface Brightness Galaxies
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
... The star formation histories of low surface brightness galaxies are interesting but poorly constrained. These objects tend to be rather blue, contradicting the initial impression that they may simply be faded remnants of higher surface brightness galaxies whose star formation has finished. Other sce ...
NexStar GT - Celestron
... automated technology. Simple and friendly to use, the NexStar is up and running after locating just two alignment stars. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the NexStar's built-in Sky Tour feature, which commands the ...
... automated technology. Simple and friendly to use, the NexStar is up and running after locating just two alignment stars. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the NexStar's built-in Sky Tour feature, which commands the ...
Dark Matter, Dark Energy, and the Fate of the Universe
... Dark Matter in the Milky Way In Chapter 15, we saw how the Sun’s motion around the galaxy reveals the total amount of mass within its orbit. We can similarly use the orbital motion of any other star around the galaxy to measure the mass of the Milky Way within that star’s orbit. In principle, we co ...
... Dark Matter in the Milky Way In Chapter 15, we saw how the Sun’s motion around the galaxy reveals the total amount of mass within its orbit. We can similarly use the orbital motion of any other star around the galaxy to measure the mass of the Milky Way within that star’s orbit. In principle, we co ...
... disk gas into outer rings, inner rings, and central mass concentrations. The resulting star formation produces a central stellar subsystem that has the high density and steep density gradient of a bulge but that was not formed by galaxy mergers. Secular evolution is not confined to barred and oval g ...
The most metal-poor galaxies
... of a galaxy requires some words of caution because in a given galaxy, depending on where one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10 ...
... of a galaxy requires some words of caution because in a given galaxy, depending on where one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10 ...
Introduction_to_pulsar_astronomy
... resulted in the Crab Nebula was witnessed by Chinese astronomers in the year 1054. Radio emission from the Crab nebula was first detected by Bolton, Stanley and Slee (1949). It is one of the most powerful radio sources known, with a flux of 1000 Jy at 1 GHz. Apart from M1, it is also known as Taurus ...
... resulted in the Crab Nebula was witnessed by Chinese astronomers in the year 1054. Radio emission from the Crab nebula was first detected by Bolton, Stanley and Slee (1949). It is one of the most powerful radio sources known, with a flux of 1000 Jy at 1 GHz. Apart from M1, it is also known as Taurus ...
Silicon isotopic abundance toward evolved stars and its application
... stars were born and the different ratios are the results of different ages, which mainly depend on their masses and metallicities. The other possibility is that the stellar evolution can significantly change the silicon isotope ratios. The first possibility implies that the 29 Si/30 Si ratio in the IS ...
... stars were born and the different ratios are the results of different ages, which mainly depend on their masses and metallicities. The other possibility is that the stellar evolution can significantly change the silicon isotope ratios. The first possibility implies that the 29 Si/30 Si ratio in the IS ...
(Download from http://astronomy.nmsu.edu/astro/) c NMSU
... from the Earth to the Moon is 384,000,000 meters or 384,000 kilometers (km). The distances found in astronomy are usually so large that we have to switch to a unit of measurement that is much larger than the meter, or even the kilometer. In and around the solar system, astronomers use “Astronomical ...
... from the Earth to the Moon is 384,000,000 meters or 384,000 kilometers (km). The distances found in astronomy are usually so large that we have to switch to a unit of measurement that is much larger than the meter, or even the kilometer. In and around the solar system, astronomers use “Astronomical ...
PDF - NMSU Astronomy
... from the Earth to the Moon is 384,000,000 meters or 384,000 kilometers (km). The distances found in astronomy are usually so large that we have to switch to a unit of measurement that is much larger than the meter, or even the kilometer. In and around the solar system, astronomers use “Astronomical ...
... from the Earth to the Moon is 384,000,000 meters or 384,000 kilometers (km). The distances found in astronomy are usually so large that we have to switch to a unit of measurement that is much larger than the meter, or even the kilometer. In and around the solar system, astronomers use “Astronomical ...
Star Formation in the Milky Way and Nearby Galaxies Further
... of powerful new instruments on the Hubble Space Telescope (HST); and a host of ground-based optical, infrared (IR), submillimeter, and radio telescopes. These new observations are providing a detailed reconstruction of the key evolutionary phases and physical processes that lead to the formation of ...
... of powerful new instruments on the Hubble Space Telescope (HST); and a host of ground-based optical, infrared (IR), submillimeter, and radio telescopes. These new observations are providing a detailed reconstruction of the key evolutionary phases and physical processes that lead to the formation of ...
Cold galaxies at low and high z
... Origin of the universe there are speculations about the origin of the universe theoretical physicists are trying to unify gravitation (ie General Relativity) and quantum theory into a single unified ‘theory of everything’ current favourite is ‘string theory’, but so far this makes no predictions ab ...
... Origin of the universe there are speculations about the origin of the universe theoretical physicists are trying to unify gravitation (ie General Relativity) and quantum theory into a single unified ‘theory of everything’ current favourite is ‘string theory’, but so far this makes no predictions ab ...
A physical interpretation of the `red Sirius` anomaly
... interpretations of ancient texts from several cultures, including Babylonian, Greco-Roman, Chinese and early-medieval European sources, over a total time-span of approximately 1400 years (800 bc to ad 600: e.g. Brecher 1979; Schlosser & Bergmann 1985; Bonnet-Bidaud & Gry 1991). Some of the claims ha ...
... interpretations of ancient texts from several cultures, including Babylonian, Greco-Roman, Chinese and early-medieval European sources, over a total time-span of approximately 1400 years (800 bc to ad 600: e.g. Brecher 1979; Schlosser & Bergmann 1985; Bonnet-Bidaud & Gry 1991). Some of the claims ha ...
Lokal fulltext - Chalmers Publication Library
... planet with M sin i ≈ 1.6 MJup and a period of 2.7 yr. However, Walker et al. (1992) later revoked this discovery, due to uncertainty in the reasons of the found variations. They instead showed that the planetary signal was most probably due to variations in γ Cephei’s rotation (they classed the sta ...
... planet with M sin i ≈ 1.6 MJup and a period of 2.7 yr. However, Walker et al. (1992) later revoked this discovery, due to uncertainty in the reasons of the found variations. They instead showed that the planetary signal was most probably due to variations in γ Cephei’s rotation (they classed the sta ...
maximum likelihood fitting of tidal streams with application
... star counts often suggested a more spherical spheroid (Bahcall 1986). By early in the 21st century, the spheroid was still thought of as a smooth power-law distribution, but studies were starting to show that the shape of the spheroid depended on the type of star being observed, and it was noted tha ...
... star counts often suggested a more spherical spheroid (Bahcall 1986). By early in the 21st century, the spheroid was still thought of as a smooth power-law distribution, but studies were starting to show that the shape of the spheroid depended on the type of star being observed, and it was noted tha ...
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.