Aries The Ram - Maverick`s E-portfolio
... discovered inside the galaxy. NGC 772 is just less than 130 light years away from earth and has a apparent magnitude of 11.3. NGC 772 is a satellite galaxy and neighbors with a elliptical galaxy named NGC 770. This galaxy has an apparent magnitude of 14.2[5]. Aries is most known to astronomers for i ...
... discovered inside the galaxy. NGC 772 is just less than 130 light years away from earth and has a apparent magnitude of 11.3. NGC 772 is a satellite galaxy and neighbors with a elliptical galaxy named NGC 770. This galaxy has an apparent magnitude of 14.2[5]. Aries is most known to astronomers for i ...
Gas fraction and star formation efficiency at z \< 1.0⋆⋆⋆⋆⋆⋆
... and the stellar mass (M∗ ). The bulk of star-forming galaxies follow the “normal” mode of star formation in the center of correlation, and define the SFR-M∗ as “main sequence”. The galaxies in the upper envelope of this main sequence have higher SFR at a given mass. These starbursts are rather rare, ...
... and the stellar mass (M∗ ). The bulk of star-forming galaxies follow the “normal” mode of star formation in the center of correlation, and define the SFR-M∗ as “main sequence”. The galaxies in the upper envelope of this main sequence have higher SFR at a given mass. These starbursts are rather rare, ...
Astronomy Assignment #1
... Precession is the slow wobble of the Earth’s rotation axis over a 25,800 year period during which the tilt of the axis is constant, but the orientation of the tilt migrates around the line perpendicular to the Earth’s orbital plane. Precession is caused by the Sun’s uneven gravitational pull on the ...
... Precession is the slow wobble of the Earth’s rotation axis over a 25,800 year period during which the tilt of the axis is constant, but the orientation of the tilt migrates around the line perpendicular to the Earth’s orbital plane. Precession is caused by the Sun’s uneven gravitational pull on the ...
Solutions
... Precession is the slow wobble of the Earth’s rotation axis over a 25,800 year period during which the tilt of the axis is constant, but the orientation of the tilt migrates around the line perpendicular to the Earth’s orbital plane. Precession is caused by the Sun’s uneven gravitational pull on the ...
... Precession is the slow wobble of the Earth’s rotation axis over a 25,800 year period during which the tilt of the axis is constant, but the orientation of the tilt migrates around the line perpendicular to the Earth’s orbital plane. Precession is caused by the Sun’s uneven gravitational pull on the ...
“XRbinary”: A Program to Calculate the Orbital Light Curves of X
... For the most accurate calculations, equation 41 needs a large grid of specific intensities as a function of Tef f , log g, µ, and λ. The calculations can be simplified by assuming that the angular dependence can be separated into a limb-darkening function, and that the limbdarkening coefficients are ...
... For the most accurate calculations, equation 41 needs a large grid of specific intensities as a function of Tef f , log g, µ, and λ. The calculations can be simplified by assuming that the angular dependence can be separated into a limb-darkening function, and that the limbdarkening coefficients are ...
astro7a_sun_shortv3
... How many years will the Sun continue shining? Is the Sun’s light output constant, or variable? What doesn’t the Sun contract, due to its gravity? How did the Sun form ? What are sunspots? And those loops on the surface? What is the “sunspot cycle”? What is the Sun made of? Does the Sun have layers i ...
... How many years will the Sun continue shining? Is the Sun’s light output constant, or variable? What doesn’t the Sun contract, due to its gravity? How did the Sun form ? What are sunspots? And those loops on the surface? What is the “sunspot cycle”? What is the Sun made of? Does the Sun have layers i ...
A Radial Velocity Search for Extra-Solar Planets Using an Iodine
... the ends of a quartz tube 10 cm in length. A feed-through tube 1 cm in diameter was then fused through the cylindrical walls near the centre of the cell and the free end of this tube was attached to a glass manifold. At one end of the manifold was a sample tube containing solid iodine and at the oth ...
... the ends of a quartz tube 10 cm in length. A feed-through tube 1 cm in diameter was then fused through the cylindrical walls near the centre of the cell and the free end of this tube was attached to a glass manifold. At one end of the manifold was a sample tube containing solid iodine and at the oth ...
Chapter 10
... 4. Describe the interior of Jupiter and draw a labeled sketch of a cross section through Jupiter. 5. Be able to identify by sight, and to describe the Galilean satellites of Jupiter, including the origin and properties of their surface features. How can these moons be warm even though they are so sm ...
... 4. Describe the interior of Jupiter and draw a labeled sketch of a cross section through Jupiter. 5. Be able to identify by sight, and to describe the Galilean satellites of Jupiter, including the origin and properties of their surface features. How can these moons be warm even though they are so sm ...
Is there a Supermassive Black Hole at the Center of the Milky Way?
... been accelerated to bulk relativistic speeds3 . One predicted consequence was that such sources would display apparent motions on the sky that were faster than the speed of light (so called super-luminal motion discussed below). In the late 1960s, Very Long Baseline Interferometry (VLBI) extended ba ...
... been accelerated to bulk relativistic speeds3 . One predicted consequence was that such sources would display apparent motions on the sky that were faster than the speed of light (so called super-luminal motion discussed below). In the late 1960s, Very Long Baseline Interferometry (VLBI) extended ba ...
1998 - Universitäts-Sternwarte München
... We adopt a purely spectroscopic approach. The analysis is strictly differential with respect to the Sun. The modeling of the spectral lines is based on T. Gehren’s (1975) atmosphere program that makes use of the standard assumptions such as hydrostatic equilibrium, plane-parallel layers and local th ...
... We adopt a purely spectroscopic approach. The analysis is strictly differential with respect to the Sun. The modeling of the spectral lines is based on T. Gehren’s (1975) atmosphere program that makes use of the standard assumptions such as hydrostatic equilibrium, plane-parallel layers and local th ...
The cosmic origin of fluorine and sulphur
... Big Bang when our Universe was born. All other elements have been formed, and keep being formed, in different processes in different types of stars. is means that all atoms, except hydrogen and helium, that build up all things, plants, animals, and humans in our surroundings have been formed in stars ...
... Big Bang when our Universe was born. All other elements have been formed, and keep being formed, in different processes in different types of stars. is means that all atoms, except hydrogen and helium, that build up all things, plants, animals, and humans in our surroundings have been formed in stars ...
A Walk through the Southern Sky: A Guide to Stars and
... from the Moon to reach the Earth and more than 8 minutes for light from the Sun to reach Earth. Compare this with the 4.3 years that it takes for the light from the nearest star, Rigil of Centaurus, to reach the Earth. Deneb in the Northern Cross is over 1000 light years away. That means the light w ...
... from the Moon to reach the Earth and more than 8 minutes for light from the Sun to reach Earth. Compare this with the 4.3 years that it takes for the light from the nearest star, Rigil of Centaurus, to reach the Earth. Deneb in the Northern Cross is over 1000 light years away. That means the light w ...
ASPEN WORKSHOP 2003
... A stars at celestial equator show possible ring at 40 kpc (of HB and blue straggler stars), in same position as Sag dwarf [perilously close to edge of suvey limit] CMD needs off-source target subtraction to show MSTO and HB of Sag dwarf, so much larger number of stars available at 0.1
... A stars at celestial equator show possible ring at 40 kpc (of HB and blue straggler stars), in same position as Sag dwarf [perilously close to edge of suvey limit] CMD needs off-source target subtraction to show MSTO and HB of Sag dwarf, so much larger number of stars available at 0.1
Document
... Using IRAM and SCUBA: ~30% of radio-quiet quasars at z>4 detected at 1mm (observed frame) at 1mJy level submm radiation in radio-quiet quasars come from thermal dust with mass ~ 108 Msun • If dust heating came from starburst star formation rate of ...
... Using IRAM and SCUBA: ~30% of radio-quiet quasars at z>4 detected at 1mm (observed frame) at 1mJy level submm radiation in radio-quiet quasars come from thermal dust with mass ~ 108 Msun • If dust heating came from starburst star formation rate of ...
Astronomy Astrophysics NGC 7419 as a template for red supergiant clusters &
... tracks. Though the presence of five red supergiants is marginally consistent with theoretical expectations, the high number of Be stars and very low number of luminous evolved B stars hint at some unknown physical factor that is not considered in current synthesis models. Key words. open clusters an ...
... tracks. Though the presence of five red supergiants is marginally consistent with theoretical expectations, the high number of Be stars and very low number of luminous evolved B stars hint at some unknown physical factor that is not considered in current synthesis models. Key words. open clusters an ...
Luminosity and Mass Functions of Galaxies
... history (e.g. Dn (4000) or Sérsic index). When galaxies are classified by star-formation history, other parameters (e.g. Dn (4000), Sérsic index, Hubble type, quantitative morphology parameters) are nearly uncorrelated with environment. Significant differences between Nn = 0 and Nn = 1. Degeneracy ...
... history (e.g. Dn (4000) or Sérsic index). When galaxies are classified by star-formation history, other parameters (e.g. Dn (4000), Sérsic index, Hubble type, quantitative morphology parameters) are nearly uncorrelated with environment. Significant differences between Nn = 0 and Nn = 1. Degeneracy ...
Emission from dust in galaxies: Metallicity dependence
... region (Osterbrock 1989). Thus, during the resonant scatterings in an H ii region, all the Lyα photons are assumed to be absorbed by grains in IHK00, which this paper is based on. If the dust-to-gas ratio is significantly smaller than the Galactic value, the dust grains might not efficiently absorb ...
... region (Osterbrock 1989). Thus, during the resonant scatterings in an H ii region, all the Lyα photons are assumed to be absorbed by grains in IHK00, which this paper is based on. If the dust-to-gas ratio is significantly smaller than the Galactic value, the dust grains might not efficiently absorb ...
Summary of Talks at Growing Black Holes 2004 in Garching
... -> High resolution CO observations of the object resolve it spatially into two peaks. It also resolved in velocity space, with a CO line width of 280 km/s and a bulge mass estimate of 1e10 solar masses within 2kpc, which is lower than expected from M sigma relation. Is this object not fully assemble ...
... -> High resolution CO observations of the object resolve it spatially into two peaks. It also resolved in velocity space, with a CO line width of 280 km/s and a bulge mass estimate of 1e10 solar masses within 2kpc, which is lower than expected from M sigma relation. Is this object not fully assemble ...
an introduction to astrophysics
... then we can insert this result into the second equation to give an expression for m2 alone. Rearrangement of the first equation gives m1 = 3.3 − m2 , then substituting for m1 in the second equation gives (3.3 − m2 )/m2 = 1.2. Multiplying both sides of the equation by m2 , we have (3.3 − m2 ) = 1.2m2 ...
... then we can insert this result into the second equation to give an expression for m2 alone. Rearrangement of the first equation gives m1 = 3.3 − m2 , then substituting for m1 in the second equation gives (3.3 − m2 )/m2 = 1.2. Multiplying both sides of the equation by m2 , we have (3.3 − m2 ) = 1.2m2 ...
1 Cosmology: a brief refresher course
... to form heavier nuclei, they cannot immediately do so, as immediately after freeze-out there are still too many extremely high energy photons around, and these photodisintegrate any heavy nuclei that form. As the Universe expands and cools, however, the number density of these photons falls off expo ...
... to form heavier nuclei, they cannot immediately do so, as immediately after freeze-out there are still too many extremely high energy photons around, and these photodisintegrate any heavy nuclei that form. As the Universe expands and cools, however, the number density of these photons falls off expo ...
Astronomy Astrophysics Circumstellar emission in Be/X-ray binaries of the Magellanic
... Aims. We study the optical and near-infrared colour excesses produced by circumstellar emission in a sample of Be/X-ray binaries. Our main goals are exploring whether previously published relations, valid for isolated Be stars, are applicable to Be/X-ray binaries and computing the distance to these ...
... Aims. We study the optical and near-infrared colour excesses produced by circumstellar emission in a sample of Be/X-ray binaries. Our main goals are exploring whether previously published relations, valid for isolated Be stars, are applicable to Be/X-ray binaries and computing the distance to these ...
Galaxy Spiral Arms
... This is actually the same Gravitation that Newton had quantified, but it is an entirely different perspective. Think of any galaxy spiral arm as a very large and massive “open cluster” of stars. We all accept that open clusters have a structural integrity due to mutual gravitation, even while revolv ...
... This is actually the same Gravitation that Newton had quantified, but it is an entirely different perspective. Think of any galaxy spiral arm as a very large and massive “open cluster” of stars. We all accept that open clusters have a structural integrity due to mutual gravitation, even while revolv ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.