Fluorine abundances in dwarf stars of the solar neighbourhood⋆
... (Renda et al. 2004; Kobayashi et al. 2011). However, the relative contributions of the three F productors remains disputed. The targets observed so far are probably not the most appropriate one for deriving accurate F abundances. First, most of them are giant stars, where mixing may have occurred, c ...
... (Renda et al. 2004; Kobayashi et al. 2011). However, the relative contributions of the three F productors remains disputed. The targets observed so far are probably not the most appropriate one for deriving accurate F abundances. First, most of them are giant stars, where mixing may have occurred, c ...
Chapter 12
... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
... seems to move against the background even though in reality it is your head that has changed position, not your hand. This simple demonstration illustrates how parallax gives a clue to an object’s distance. If you hold your hand at different distances from your face, you will notice that the apparen ...
The Submillimeter Frontier: A Space Science Imperative
... luminosity of a typical spiral galaxy (the Milky Way, Figure 1) has just two large bumps, one from 0.2 to 2 µm from the luminosity of stars, and one nearly as large from 50 - 400 µm, from the energy absorbed and reradiated by dust. These two terms dwarf all the others, but only one has been widely o ...
... luminosity of a typical spiral galaxy (the Milky Way, Figure 1) has just two large bumps, one from 0.2 to 2 µm from the luminosity of stars, and one nearly as large from 50 - 400 µm, from the energy absorbed and reradiated by dust. These two terms dwarf all the others, but only one has been widely o ...
• Teacher developed presentations. • Teacher developed laboratory
... Integration of ELA Common Core Standards (The tasks below are meant to serve as sample activities regarding the integration of the standard listed. Related up-to-date material can be substituted) Reading/Writing in Science and Technical Subjects CCSS.ELA-Literacy.RST.9-10.1 Cite specific textual ev ...
... Integration of ELA Common Core Standards (The tasks below are meant to serve as sample activities regarding the integration of the standard listed. Related up-to-date material can be substituted) Reading/Writing in Science and Technical Subjects CCSS.ELA-Literacy.RST.9-10.1 Cite specific textual ev ...
P - Inaf
... least the final sample of model galaxies is biased in a similar way as the real data, thus allowing for a more meaningful comparison.2 Fig. 6 shows the average metallicity and mass-weighted stellar ages of the W08 model galaxies as functions of stellar and halo mass, with central and satellite galax ...
... least the final sample of model galaxies is biased in a similar way as the real data, thus allowing for a more meaningful comparison.2 Fig. 6 shows the average metallicity and mass-weighted stellar ages of the W08 model galaxies as functions of stellar and halo mass, with central and satellite galax ...
The Be/X-ray transient V0332153: evidence for a tilt between the
... infrared excess when compared to normal stars of the same spectral types are attributed to the presence of a circumstellar disc. Most Be/X-ray binaries have relatively eccentric orbits, and the neutron star companion is normally far away from the disc surrounding the Be star. Due to their different ...
... infrared excess when compared to normal stars of the same spectral types are attributed to the presence of a circumstellar disc. Most Be/X-ray binaries have relatively eccentric orbits, and the neutron star companion is normally far away from the disc surrounding the Be star. Due to their different ...
PDF only - at www.arxiv.org.
... and the position angle = (t). The Kepler’s constant obtained is used to derive the elements of orbit. As a case study the angular separation and the position angle of the WDS 00063 +5826 and the WDS 04403-5857 were investigated. For calculating the element of orbit the Thiele-Innes van den Bos me ...
... and the position angle = (t). The Kepler’s constant obtained is used to derive the elements of orbit. As a case study the angular separation and the position angle of the WDS 00063 +5826 and the WDS 04403-5857 were investigated. For calculating the element of orbit the Thiele-Innes van den Bos me ...
The Gaseous Halo of NGC 891 Edmund Hodges-Kluck Joel Bregman
... • Galaxy Halos • NGC 891 as an interesting case • Halo Metallicity • X-ray Measurements • Metallicity in the cool gas ...
... • Galaxy Halos • NGC 891 as an interesting case • Halo Metallicity • X-ray Measurements • Metallicity in the cool gas ...
103-122
... et al. 1975; Bell et al. 1976), and a LTE line analysis program provide abundances for a range of elements from oxygen to europium. The appropriate Teff and log g for the model were determined from the Fe I and Fe II lines by the usual means. Of the light elements, Mg and Ca are best represented, wi ...
... et al. 1975; Bell et al. 1976), and a LTE line analysis program provide abundances for a range of elements from oxygen to europium. The appropriate Teff and log g for the model were determined from the Fe I and Fe II lines by the usual means. Of the light elements, Mg and Ca are best represented, wi ...
Abstracts - Physics of Evolved Stars 2015
... OH/IR stars are believed to be the final stage on the asymptotic giant branch (AGB) of intermediate main-sequence mass (5-8 solar masses) stars before they evolve into the post-AGB and planetary-nebula stages. AGB stars lose most of their stellar envelope in the form of a gaseous and dusty stellar w ...
... OH/IR stars are believed to be the final stage on the asymptotic giant branch (AGB) of intermediate main-sequence mass (5-8 solar masses) stars before they evolve into the post-AGB and planetary-nebula stages. AGB stars lose most of their stellar envelope in the form of a gaseous and dusty stellar w ...
Astr 102 Lec 6: Basic Properties of Stars
... The US: 1020 Joules/year [The unit of energy is the “Joule”, equal to the kinetic energy that 1 kg has if it’s moving at 1 m/s] ...
... The US: 1020 Joules/year [The unit of energy is the “Joule”, equal to the kinetic energy that 1 kg has if it’s moving at 1 m/s] ...
Solaria Binaria - The Grazian Archive
... Solar System were it not for the fossilized voices whose shouts about their catastrophic early world and sky sound louder even today than the shout heard in contemporary science about the exploding Universe. Those anthropologists, archaeologists, and scholars of ancient humanity who believe that the ...
... Solar System were it not for the fossilized voices whose shouts about their catastrophic early world and sky sound louder even today than the shout heard in contemporary science about the exploding Universe. Those anthropologists, archaeologists, and scholars of ancient humanity who believe that the ...
A Compilation of Relevant Articles from MMM`s first 25 years, issues
... 1.A. Proxima Centauri, a small red M-type star, is just a little closer than the Alpha Centauri double sun of which it is a distant companion. This system lies 60° below the celestial equator, well below the horizon from most of the USA. 2.A. 106 million times as far as the Moon, and 9,000 times as ...
... 1.A. Proxima Centauri, a small red M-type star, is just a little closer than the Alpha Centauri double sun of which it is a distant companion. This system lies 60° below the celestial equator, well below the horizon from most of the USA. 2.A. 106 million times as far as the Moon, and 9,000 times as ...
Early-type stars in the core of the young open cluster Westerlund 2
... weak metallic lines favours an A0 classification, whilst the width of the Balmer lines suggests a giant luminosity class. We therefore adopt an A0 III spectral type. Our photometric data yield V = 14.13 ± 0.03 and B − V = 0.34 ± 0.04. If the intrinsic colours and absolute magnitudes of MSP 218 are t ...
... weak metallic lines favours an A0 classification, whilst the width of the Balmer lines suggests a giant luminosity class. We therefore adopt an A0 III spectral type. Our photometric data yield V = 14.13 ± 0.03 and B − V = 0.34 ± 0.04. If the intrinsic colours and absolute magnitudes of MSP 218 are t ...
Measurements of Neutron Star Masses
... 2 This way, TEMPO settles 2 on a DM 1 for 2this any given epoch. day that produces the best overall fit. This can bring to light intrinsic DM variations, but it can also absorb other frequency dependent effects. On two days, outliers suggest instrument 1 Figs. 9 and 10), and these problems (MJDs 535 ...
... 2 This way, TEMPO settles 2 on a DM 1 for 2this any given epoch. day that produces the best overall fit. This can bring to light intrinsic DM variations, but it can also absorb other frequency dependent effects. On two days, outliers suggest instrument 1 Figs. 9 and 10), and these problems (MJDs 535 ...
Chapter 12: The Life Cycle of Stars (contʼd)
... • the period of a massive star's life when carbon, nitrogen, and oxygen are fusing in different shells outside the core • a type of hydrogen fusion that uses carbon, nitrogen, and oxygen atoms as catalysts • the process by which helium is fused into carbon, nitrogen, and oxygen • the perio ...
... • the period of a massive star's life when carbon, nitrogen, and oxygen are fusing in different shells outside the core • a type of hydrogen fusion that uses carbon, nitrogen, and oxygen atoms as catalysts • the process by which helium is fused into carbon, nitrogen, and oxygen • the perio ...
Binarity in carbon-enhanced metal-poor stars
... The large class of CEMP-s stars is thought to obtain their overabundant carbon and s-process elements from a companion star that has gone through the asymptotic giant branch (AGB) phase and deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in fav ...
... The large class of CEMP-s stars is thought to obtain their overabundant carbon and s-process elements from a companion star that has gone through the asymptotic giant branch (AGB) phase and deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in fav ...
Chapter 2
... higher latitudes, the north celestial pole climbs higher in the sky. As this happens, the circumpolar region grows in size. On reaching the terrestrial pole, you would see the north celestial pole directly overhead. Both your latitude and the altitude of the north celestial pole would be 90⬚. The ce ...
... higher latitudes, the north celestial pole climbs higher in the sky. As this happens, the circumpolar region grows in size. On reaching the terrestrial pole, you would see the north celestial pole directly overhead. Both your latitude and the altitude of the north celestial pole would be 90⬚. The ce ...
MASSIVE CLOSE BINARIES
... by a WR-type stellar wind mass loss. The effect on massive star evolution of present day WR-type mass loss rates (Equation 2) has been studied by Vanbeveren et al. (1998 a, b, c). ...
... by a WR-type stellar wind mass loss. The effect on massive star evolution of present day WR-type mass loss rates (Equation 2) has been studied by Vanbeveren et al. (1998 a, b, c). ...
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.