Astronomy Astrophysics - Niels Bohr Institutet
... Extensive uvbyβ photometric surveys of the nearby F and G stars have been performed by Olsen (1983, 1993, 1994a, 1994b). Accurate parallaxes and proper motions have become available for large numbers of these stars from the Hipparcos (ESA 1997) and Tycho-2 (Høg et al. 2000) catalogues. The bottlenec ...
... Extensive uvbyβ photometric surveys of the nearby F and G stars have been performed by Olsen (1983, 1993, 1994a, 1994b). Accurate parallaxes and proper motions have become available for large numbers of these stars from the Hipparcos (ESA 1997) and Tycho-2 (Høg et al. 2000) catalogues. The bottlenec ...
Save the Sky: Adventures in Sky Monitoring
... First CCD device to image the position of a gamma-ray burst during the time of the gamma-ray burst trigger (#1: GRB 001005) Most complete and uniform coverage of a meteor storm: the 2001 Leonids Most complete light curves for hundreds of bright variable stars starting from May 2000, when the first C ...
... First CCD device to image the position of a gamma-ray burst during the time of the gamma-ray burst trigger (#1: GRB 001005) Most complete and uniform coverage of a meteor storm: the 2001 Leonids Most complete light curves for hundreds of bright variable stars starting from May 2000, when the first C ...
Plotting the Rotation Curve of M31
... is counteracted by the huge number of hydrogen atoms present in a galaxy so that we see this emission all of the time. ...
... is counteracted by the huge number of hydrogen atoms present in a galaxy so that we see this emission all of the time. ...
bowser - Colorado Space Grant Consortium
... red, orange, green and blue spectrum • Reasons for Choice: – LEDs do not require the use of filters in order to sense discreet wavelength ranges. – The array will produce over six million altitude, angle, and wavelength-specific data points that can easily verify the MODTRAN model. BOWSER ...
... red, orange, green and blue spectrum • Reasons for Choice: – LEDs do not require the use of filters in order to sense discreet wavelength ranges. – The array will produce over six million altitude, angle, and wavelength-specific data points that can easily verify the MODTRAN model. BOWSER ...
Chapter 15 Stars, Galaxies and Universe
... • To View the presentation as a slideshow with effects select “View” on the menu bar and click on “Slide Show.” • To advance through the presentation, click the right-arrow key or the space bar. • From the resources slide, click on any resource to see a presentation for that resource. • From the Cha ...
... • To View the presentation as a slideshow with effects select “View” on the menu bar and click on “Slide Show.” • To advance through the presentation, click the right-arrow key or the space bar. • From the resources slide, click on any resource to see a presentation for that resource. • From the Cha ...
The Ages of Stars
... stars is beyond the scope of this. Similarly, white dwarfs (WDs) are also very useful for age-dating clusters and populations using fundamentally different physics, but they have been well reviewed elsewhere (Koester (2002), von Hippel (2005), Winget & Kepler (2008), Salaris (2009)) and so will only ...
... stars is beyond the scope of this. Similarly, white dwarfs (WDs) are also very useful for age-dating clusters and populations using fundamentally different physics, but they have been well reviewed elsewhere (Koester (2002), von Hippel (2005), Winget & Kepler (2008), Salaris (2009)) and so will only ...
Influence of the Gould Belt on Interstellar Extinction
... accurate photometry in the J and Ks infrared bands presented in Fig. 1 that the reddening of stars in the regions at l ≈ 180◦, b ≈ −15◦ and l ≈ 0◦ , b ≈ +15◦ is considerably higher than that in the symmetric regions at l ≈ 180◦ , b ≈ +15◦ and l ≈ 0◦ , b ≈ −15◦ . Since the red dwarfs with (J − Ks) ≈ ...
... accurate photometry in the J and Ks infrared bands presented in Fig. 1 that the reddening of stars in the regions at l ≈ 180◦, b ≈ −15◦ and l ≈ 0◦ , b ≈ +15◦ is considerably higher than that in the symmetric regions at l ≈ 180◦ , b ≈ +15◦ and l ≈ 0◦ , b ≈ −15◦ . Since the red dwarfs with (J − Ks) ≈ ...
ASTR 110 Lab Manual Sections M02 M03 M04
... 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 it is convenient 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 “Astr ...
... 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 it is convenient 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 “Astr ...
{2.} and {4.}
... through the slot place a grease mark at the DEC. and the body name. Planets wander among the stars, but this position can be used for about one week. Stars can be permanently added in the same manner using SHA as GHA and DEC. Greater than 30 degrees (out side of the slot) use the other side DEC 180 ...
... through the slot place a grease mark at the DEC. and the body name. Planets wander among the stars, but this position can be used for about one week. Stars can be permanently added in the same manner using SHA as GHA and DEC. Greater than 30 degrees (out side of the slot) use the other side DEC 180 ...
Activity III: Calibrating Images
... Brightness Conversion Table ........................................................................................... 3 ...
... Brightness Conversion Table ........................................................................................... 3 ...
Unlocking the secrets of stellar haloes using combined star counts
... Institut Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany ...
... Institut Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany ...
Extrasolar Cosmochemistry
... We now consider the amount of mass required in our standard model; we argue that minor planets such as asteroids are the dominant source for the pollution of white dwarf atmospheres, although there might be instances in which tidal disruption and accretion of an entire planet the size of Mars has oc ...
... We now consider the amount of mass required in our standard model; we argue that minor planets such as asteroids are the dominant source for the pollution of white dwarf atmospheres, although there might be instances in which tidal disruption and accretion of an entire planet the size of Mars has oc ...
Luminosities and mass-loss rates of SMC and LMC AGB stars and
... 86 M-stars. Tables 1 and 2 list basic information: some common names (as listed by SIMBAD), an OGLE-iii identifier when this lightcurve is analysed and shown in Fig. 3, R.A. and declination in decimal degrees, the identifier used in figures and tables below, the adopted pulsation period, the (semi-) ...
... 86 M-stars. Tables 1 and 2 list basic information: some common names (as listed by SIMBAD), an OGLE-iii identifier when this lightcurve is analysed and shown in Fig. 3, R.A. and declination in decimal degrees, the identifier used in figures and tables below, the adopted pulsation period, the (semi-) ...
Full-text PDF
... 2003). In this paper we argue that radio sources may provide the required feedback while at the same time providing a solution to two other long-standing puzzles. An important unanswered question is why the gas at the centre of most galaxy clusters is apparently not condensing and turning into stars ...
... 2003). In this paper we argue that radio sources may provide the required feedback while at the same time providing a solution to two other long-standing puzzles. An important unanswered question is why the gas at the centre of most galaxy clusters is apparently not condensing and turning into stars ...
The physics of white dwarfs
... important contributions to our understanding of these stars have come from almost every subdiscipline of physics, including statistical mechanics, nuclear and particle physics, solid state, and fluid dynamics. Stars as small planets ...
... important contributions to our understanding of these stars have come from almost every subdiscipline of physics, including statistical mechanics, nuclear and particle physics, solid state, and fluid dynamics. Stars as small planets ...
Elliptical Galaxies
... galactic systems comprising just a single component, relatively bright in the center but fading rapidly with increasing radius. Elliptical galaxies are found mostly in the denser regions of the universe, from rich clusters to small groups; truely isolated ellipticals being relatively rare. Figure 1 ...
... galactic systems comprising just a single component, relatively bright in the center but fading rapidly with increasing radius. Elliptical galaxies are found mostly in the denser regions of the universe, from rich clusters to small groups; truely isolated ellipticals being relatively rare. Figure 1 ...
Deep SDSS optical spectroscopy of distant halo stars I. Atmospheric
... exceptions are some of the SEGUE fields at low Galactic latitude. With an absolute magnitude Mg ∼ 5, F-type halo turnoff stars observed by the SDSS/BOSS spectrographs are located at distances out to a few tens of kpc, and more evolved, horizontalbranch stars with similar temperatures are at distance ...
... exceptions are some of the SEGUE fields at low Galactic latitude. With an absolute magnitude Mg ∼ 5, F-type halo turnoff stars observed by the SDSS/BOSS spectrographs are located at distances out to a few tens of kpc, and more evolved, horizontalbranch stars with similar temperatures are at distance ...
Understanding the zodiac, and why there really are 12 signs of the
... of history, have recognized varying numbers of constellations in this region of the sky, as adjustments were made to constellation boundaries. However, the zodiac itself, being a mathematical division of an astrononomical circle, has only ever been divided into twelve equally spaced "zodiac signs". ...
... of history, have recognized varying numbers of constellations in this region of the sky, as adjustments were made to constellation boundaries. However, the zodiac itself, being a mathematical division of an astrononomical circle, has only ever been divided into twelve equally spaced "zodiac signs". ...
StellarManual
... implicit measure of intrinsic brightness and how much energy a star is releasing per second (luminosity). Thus: Avior (m = 1.9) and Alkaid (m = 1.9) appear to be the same brightness, but Avior (M = -4.8) emits more energy than Alkaid (M = -1.8). Barnard’s Star (m = 9.5) appears brighter than Wolf 35 ...
... implicit measure of intrinsic brightness and how much energy a star is releasing per second (luminosity). Thus: Avior (m = 1.9) and Alkaid (m = 1.9) appear to be the same brightness, but Avior (M = -4.8) emits more energy than Alkaid (M = -1.8). Barnard’s Star (m = 9.5) appears brighter than Wolf 35 ...
XXII. Low-efficiency star formation in early-type galaxies
... surface densities of CO-traced molecular gas are not lower in ETGs than in LTGs. Even dense molecular tracers, such as HCN, are now detected in red-sequence ETGs (Krips et al. 2010; Crocker et al. 2012, hereafter Paper XI). The significant mass fraction and relatively high surface density of cold ga ...
... surface densities of CO-traced molecular gas are not lower in ETGs than in LTGs. Even dense molecular tracers, such as HCN, are now detected in red-sequence ETGs (Krips et al. 2010; Crocker et al. 2012, hereafter Paper XI). The significant mass fraction and relatively high surface density of cold ga ...
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.