S1_Testbank
... E) It depends on the right ascension of the star. Answer: B 13) Suppose you lived at Earth's equator. Which of the following statements would not be true? A) The north celestial pole is directly on your horizon, due north (with Polaris quite nearby). B) The south celestial pole is directly on your h ...
... E) It depends on the right ascension of the star. Answer: B 13) Suppose you lived at Earth's equator. Which of the following statements would not be true? A) The north celestial pole is directly on your horizon, due north (with Polaris quite nearby). B) The south celestial pole is directly on your h ...
Rocky planetesimals as the origin of metals in DZ stars
... where hydrogen is detected or inferred (Dufour et al. 2007) versus height above the Galactic mid-plane and tangential speed. No obvious pattern is seen, although there may be a higher density of DZA stars near the Galactic disc and perhaps also towards more modest speeds, but the former may be an ob ...
... where hydrogen is detected or inferred (Dufour et al. 2007) versus height above the Galactic mid-plane and tangential speed. No obvious pattern is seen, although there may be a higher density of DZA stars near the Galactic disc and perhaps also towards more modest speeds, but the former may be an ob ...
Star formation in a galactic outflow
... as stars form in the outflow they react only to gravity, and are rapidly decelerated by the galaxy gravitation field (that is, they move ballistically). A simple dynamical model (see Methods) can easily describe such an effect. In Fig.4b the solid curve shows the position-velocity track of stars for ...
... as stars form in the outflow they react only to gravity, and are rapidly decelerated by the galaxy gravitation field (that is, they move ballistically). A simple dynamical model (see Methods) can easily describe such an effect. In Fig.4b the solid curve shows the position-velocity track of stars for ...
Spectroscopy: Unlocking the Secrets of Star Light
... larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into compo ...
... larger image. This allows an astronomer to take a number of spectra from different regions of an extended source such as a galaxy or of s specific star in the telescope's field of view. Light is then collimated (made parallel) before hitting a diffraction grating. This disperses the light into compo ...
chapter 15 navigational astronomy
... becoming increasingly visible in the evening sky, until (about 7 days after new Moon) it reaches first quarter, when the Moon rises about noon and sets about midnight. Over the next week the Moon will rise later and later in the afternoon until full Moon, when it rises about sunset and dominates the ...
... becoming increasingly visible in the evening sky, until (about 7 days after new Moon) it reaches first quarter, when the Moon rises about noon and sets about midnight. Over the next week the Moon will rise later and later in the afternoon until full Moon, when it rises about sunset and dominates the ...
Chapter 12: The Life Cycle of Stars
... • The result is a rotating protostar with a rotating disk of gas & dust. • The orderly motions of our solar system today are a direct result of the solar systemʼs birth in a spinning, flattened cloud of gas. ...
... • The result is a rotating protostar with a rotating disk of gas & dust. • The orderly motions of our solar system today are a direct result of the solar systemʼs birth in a spinning, flattened cloud of gas. ...
Red supergiants and the past of Cygnus OB2
... (e.g. Messineo et al. 2014; Davies et al. 2007; Clark et al. 2009; Mengel & Tacconi-Garman 2007). At the same time, their presence and characteristics would set relevant lower limits on the past massive star formation activity of the region. In this paper we report on seven red supergiants located w ...
... (e.g. Messineo et al. 2014; Davies et al. 2007; Clark et al. 2009; Mengel & Tacconi-Garman 2007). At the same time, their presence and characteristics would set relevant lower limits on the past massive star formation activity of the region. In this paper we report on seven red supergiants located w ...
Essential physics of early galaxy formation
... model, based on only two free parameters than can be readily constrained by existing data 1 , in order to isolate the fundamental physics that shapes galaxy evolution in the first billion years. We show that, once the two parameters have been fixed, this model naturally yields the correct mass-tolig ...
... model, based on only two free parameters than can be readily constrained by existing data 1 , in order to isolate the fundamental physics that shapes galaxy evolution in the first billion years. We show that, once the two parameters have been fixed, this model naturally yields the correct mass-tolig ...
Sample pages 1 PDF
... to a relatively thin disk. In our own Galaxy, this disk can be seen as the band of stars stretched across the night sky, which led to it being named the Milky Way. Besides such disk galaxies, there is a second major class of luminous stellar systems, the elliptical galaxies. Their properties differ ...
... to a relatively thin disk. In our own Galaxy, this disk can be seen as the band of stars stretched across the night sky, which led to it being named the Milky Way. Besides such disk galaxies, there is a second major class of luminous stellar systems, the elliptical galaxies. Their properties differ ...
Stellar Metamorphosis as Alternative to Nebular Hypothesis
... All stars are born as singular entities from the electromagnetic process known as a zpinch completely separate from other stars. [17][18] As they travel the galaxy and age they take up ...
... All stars are born as singular entities from the electromagnetic process known as a zpinch completely separate from other stars. [17][18] As they travel the galaxy and age they take up ...
ASTRONOMY AND ASTROPHYSICS Barium abundances in cool
... of [Ba/Fe] with [Fe/H] at [Fe/H] < ; : . For the extremely metal-poor stars ([Fe/H] < ; : ) barium is underabundant relative to iron by ; : dex, and [Ba/Fe] grows with increasing metallicity and reaches a solar value at about [Fe/H] ; : . The second feature is the large scatter of the data. It is wi ...
... of [Ba/Fe] with [Fe/H] at [Fe/H] < ; : . For the extremely metal-poor stars ([Fe/H] < ; : ) barium is underabundant relative to iron by ; : dex, and [Ba/Fe] grows with increasing metallicity and reaches a solar value at about [Fe/H] ; : . The second feature is the large scatter of the data. It is wi ...
here - Georgia Tech Astronomy Club
... a. Identify in the sky at least 10 constellations, at least four of which are in the zodiac. b. Identify at least eight conspicuous stars, five of which are of magnitude 1 or brighter. c. Make two sketches of the Big Dipper. In one sketch, show the Big Dipper's orientation in the early evening sky. ...
... a. Identify in the sky at least 10 constellations, at least four of which are in the zodiac. b. Identify at least eight conspicuous stars, five of which are of magnitude 1 or brighter. c. Make two sketches of the Big Dipper. In one sketch, show the Big Dipper's orientation in the early evening sky. ...
The Norma cluster (ACO3627) – II. The near-infrared Ks
... Not all clusters can be modelled by a Schechter function, however. The Virgo cluster, for example, has a LF with a ‘double-wave’ structure (Binggeli et al. 1988). Clusters containing cD galaxies seem to have a steeper bright end than those without cD galaxies. Often the brightest galaxy is excluded ...
... Not all clusters can be modelled by a Schechter function, however. The Virgo cluster, for example, has a LF with a ‘double-wave’ structure (Binggeli et al. 1988). Clusters containing cD galaxies seem to have a steeper bright end than those without cD galaxies. Often the brightest galaxy is excluded ...
The Stellar Population Synthesis Technique Charlie Conroy Princeton
... – Revival of interest in stellar evolution, stellar spectral libraries, IMF constraints ...
... – Revival of interest in stellar evolution, stellar spectral libraries, IMF constraints ...
12-1 - Piscataway High School
... would have at some standard distance. Astronomers have adopted 10 pc as the standard distance and refer to the apparent visual magnitude a star would have if it were 10 pc away as its absolute visual magnitude (MV). This is an expression of the intrinsic brightness of the star. The symbol for absolu ...
... would have at some standard distance. Astronomers have adopted 10 pc as the standard distance and refer to the apparent visual magnitude a star would have if it were 10 pc away as its absolute visual magnitude (MV). This is an expression of the intrinsic brightness of the star. The symbol for absolu ...
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.