Galaxy Formation Leading questions for today • How do visible
... result depends on sense of rotation of disk: • prograde: disk angular momentum pointing in same direction as that of orbit. • retrograde: disk angular momentum pointing in opposite direction as that of orbit. Tails are formed by tidal forces. Each disk can produce 1 tail. Why is this ? Model the mer ...
... result depends on sense of rotation of disk: • prograde: disk angular momentum pointing in same direction as that of orbit. • retrograde: disk angular momentum pointing in opposite direction as that of orbit. Tails are formed by tidal forces. Each disk can produce 1 tail. Why is this ? Model the mer ...
The type Ia supernova 1994D in NGC 4526: the early phases The
... of opportunity at ESO. In this paper, we present and discuss the UBVRI photometry and the spectra collected during this campaign from 11 days before maximum to about two months afterwards. Several absorption components of the Na I D lines arising in our Galaxy, in NGC 4526 and in high-velocity cloud ...
... of opportunity at ESO. In this paper, we present and discuss the UBVRI photometry and the spectra collected during this campaign from 11 days before maximum to about two months afterwards. Several absorption components of the Na I D lines arising in our Galaxy, in NGC 4526 and in high-velocity cloud ...
Diapositiva 1 - Dipartimento di Fisica
... The first extrasolar planet around a main-sequence star was found in 1995 around 51 Pegasi, a G5V star, analyzing the radial velocity variations of the parent star due to its motion around the barycenter of the system [3]. The radial velocity method allow to detect only Jupiter-like planets, in part ...
... The first extrasolar planet around a main-sequence star was found in 1995 around 51 Pegasi, a G5V star, analyzing the radial velocity variations of the parent star due to its motion around the barycenter of the system [3]. The radial velocity method allow to detect only Jupiter-like planets, in part ...
M13/4/PHYSI/SP3/ENG/TZ1/XX Tuesday 7 May
... Newton suggested that the universe is infinite, uniform and static. For each of Newton’s three suggestions, outline one piece of current astronomical evidence that contradicts the suggestion. ...
... Newton suggested that the universe is infinite, uniform and static. For each of Newton’s three suggestions, outline one piece of current astronomical evidence that contradicts the suggestion. ...
Winter Night Sky Guide
... M31 – the Andromeda Galaxy M31 is a spiral galaxy very similar but rather larger than our Milky Way. It is on collision course with us but don’t worry, impact is in 2 billion years time. It is 2.9 million light-years away. This makes it the furthest object easily seen with the naked eye. However thi ...
... M31 – the Andromeda Galaxy M31 is a spiral galaxy very similar but rather larger than our Milky Way. It is on collision course with us but don’t worry, impact is in 2 billion years time. It is 2.9 million light-years away. This makes it the furthest object easily seen with the naked eye. However thi ...
star
... The Expanding Universe The observed red shift in the spectra of galaxies shows that the universe is expanding. The Doppler effect can be used to determine how fast stars or galaxies are approaching or moving away from Earth. • When a star or galaxy is approaching Earth, the lines in its spectrum ar ...
... The Expanding Universe The observed red shift in the spectra of galaxies shows that the universe is expanding. The Doppler effect can be used to determine how fast stars or galaxies are approaching or moving away from Earth. • When a star or galaxy is approaching Earth, the lines in its spectrum ar ...
Oort Cloud Evolu on in a Long
... • When did the Oort Cloud form? − Very early or very late? − Nice Model (B&M-‐13) or independent? ...
... • When did the Oort Cloud form? − Very early or very late? − Nice Model (B&M-‐13) or independent? ...
High mass-to-light ratios of UCDs
... ❒ There are several ways to explain these high mass-to-light ratios. They could be caused by stellar mass-functions which are either top or bottom heavy (Dabringhausen et al. 2008, Mieske & Kroupa 2008). ❒ Goerdt et al. (2008) have investigated a scenario in which UCDs form through adiabatic gas inf ...
... ❒ There are several ways to explain these high mass-to-light ratios. They could be caused by stellar mass-functions which are either top or bottom heavy (Dabringhausen et al. 2008, Mieske & Kroupa 2008). ❒ Goerdt et al. (2008) have investigated a scenario in which UCDs form through adiabatic gas inf ...
Lecture5
... happens. The intensity (brightness) of the binary vs time curve is called `light curve’. Then the shape of the light curve can often determine various useful parameters, e.g., the inclination angle , nature of the stellar atmosphere, and sometimes even stellar radius. See class notes and Fig. II-36 ...
... happens. The intensity (brightness) of the binary vs time curve is called `light curve’. Then the shape of the light curve can often determine various useful parameters, e.g., the inclination angle , nature of the stellar atmosphere, and sometimes even stellar radius. See class notes and Fig. II-36 ...
wk11noQ
... stars without requiring dark matter. • This theory made specific predictions which were not borne out by observation, and now is (almost) universally believed to be wrong. ...
... stars without requiring dark matter. • This theory made specific predictions which were not borne out by observation, and now is (almost) universally believed to be wrong. ...
Searching for RR Lyrae Stars in M15
... an object is how luminous an object is as seen from Earth while the absolute magnitude of an object is what the apparent magnitude would be if the source was located 10 parsecs away from us. The distance modulus helps in determining distances and magnitudes to various objects. This very convenient f ...
... an object is how luminous an object is as seen from Earth while the absolute magnitude of an object is what the apparent magnitude would be if the source was located 10 parsecs away from us. The distance modulus helps in determining distances and magnitudes to various objects. This very convenient f ...
FREE Sample Here - Find the cheapest test bank for your
... A) Earth's speed of revolution about the Sun, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of rotation on its axis, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds of very distant galaxies relative to us B) Earth's speed ...
... A) Earth's speed of revolution about the Sun, typical speeds of stars in the local solar neighborhood relative to us, Earth's speed of rotation on its axis, the speed of our solar system orbiting the center of the Milky Way Galaxy, the speeds of very distant galaxies relative to us B) Earth's speed ...
Astronomy and the Coal Age of Alabama
... The sky is like a time machine. Light travels in vacuum at finite speed, 186,272 miles per second. In a year, a beam of light travels one light year, or 6 trillion miles. This means that the farther out in space we look, the farther back in time we see. The Minkin site is 310 Myr old. Sunlight that ...
... The sky is like a time machine. Light travels in vacuum at finite speed, 186,272 miles per second. In a year, a beam of light travels one light year, or 6 trillion miles. This means that the farther out in space we look, the farther back in time we see. The Minkin site is 310 Myr old. Sunlight that ...
spiral nebulae
... If this object is indeed comparable to our Milky Way, it must be about one hundred thousand light years across. The path followed by an object travelling around and around the centre must be tens or hundreds of thousands of light years in length.` To give rise to the ‘observed’ rotational motions, o ...
... If this object is indeed comparable to our Milky Way, it must be about one hundred thousand light years across. The path followed by an object travelling around and around the centre must be tens or hundreds of thousands of light years in length.` To give rise to the ‘observed’ rotational motions, o ...
Additional Cosmology Images
... clusters NGC 265 and NGC 290 in the Small Magellanic Cloud — two sparkling sets of gemstones in the southern sky. These images, taken with Hubble's Advanced Camera for Surveys, show a myriad of stars in crystal clear detail. The brilliant open star clusters are located about 200,000 lightyears away ...
... clusters NGC 265 and NGC 290 in the Small Magellanic Cloud — two sparkling sets of gemstones in the southern sky. These images, taken with Hubble's Advanced Camera for Surveys, show a myriad of stars in crystal clear detail. The brilliant open star clusters are located about 200,000 lightyears away ...
Star Clusters in Mergers
... What can we say about the Stellar Component in the Antennae ? In our 1999 paper, one of our primary difficulties was differentiating stars from clusters. This led us to conclude that the number of young star clusters in the Antennae was between 800 and 8000, a pretty big range ! Our new ACS data pr ...
... What can we say about the Stellar Component in the Antennae ? In our 1999 paper, one of our primary difficulties was differentiating stars from clusters. This led us to conclude that the number of young star clusters in the Antennae was between 800 and 8000, a pretty big range ! Our new ACS data pr ...
Searching for Black Holes. Photometry in our Classrooms.
... emitting binary systems are of high importance, while in this case one of the components is a compact object probably a black hole or a neutron star, and the other component a „normal‟ star (usually a main sequence star or red giant) [5],[6]. The star usually orbits around the common center of mass ...
... emitting binary systems are of high importance, while in this case one of the components is a compact object probably a black hole or a neutron star, and the other component a „normal‟ star (usually a main sequence star or red giant) [5],[6]. The star usually orbits around the common center of mass ...
Stellar Evolution
... • Imagine we have a cluster of stars that were all formed at the same time, but have a variety of different masses • Using what we know about stellar evolution is there a way to determine the age of the star cluster? ...
... • Imagine we have a cluster of stars that were all formed at the same time, but have a variety of different masses • Using what we know about stellar evolution is there a way to determine the age of the star cluster? ...
on the absolute age of the metal-rich globular m71
... distance modulus of μ = 12.84 ± 0.04 ± 0.1 mag by adopting E (B-V ) = 0.28 mag. By comparing the M71 data with the isochrones from VandenBerg et al. (2000), the authors also provided an absolute age of 12 Gyr and found the same age for 47 Tuc. After the transformation of the Clem et al. (2008) M71 fi ...
... distance modulus of μ = 12.84 ± 0.04 ± 0.1 mag by adopting E (B-V ) = 0.28 mag. By comparing the M71 data with the isochrones from VandenBerg et al. (2000), the authors also provided an absolute age of 12 Gyr and found the same age for 47 Tuc. After the transformation of the Clem et al. (2008) M71 fi ...
PSF - ESO
... The program starts off by considering the first input list as a "master" list. Taking each star in turn from the second input list, it applies the provisional transformations derived to determine the star's position in the coordinate system of the master list. It then goes through the master list, l ...
... The program starts off by considering the first input list as a "master" list. Taking each star in turn from the second input list, it applies the provisional transformations derived to determine the star's position in the coordinate system of the master list. It then goes through the master list, l ...
Modified True/False - Indicate whether the statement is true or false
... ____ 15. HS-ESS1-1 When a white dwarf star no longer emits energy, it may become a a. Black hole. c. Neutron star. b. Nova. d. Black dwarf. ____ 16. HS-ESS1-1 The process in which smaller atomic nuclei combine into larger atomic nuclei is known as a. Gravitational attraction. c. The Doppler effect. ...
... ____ 15. HS-ESS1-1 When a white dwarf star no longer emits energy, it may become a a. Black hole. c. Neutron star. b. Nova. d. Black dwarf. ____ 16. HS-ESS1-1 The process in which smaller atomic nuclei combine into larger atomic nuclei is known as a. Gravitational attraction. c. The Doppler effect. ...
Atypical thermonuclear supernovae from tidally crushed white dwarfs
... way that would increase the discovery rate for type Ia supernovae from a few thousands (Aldering et al. 2007) to about hundreds of thousands (Riess & Livio 2006) per year. The transient itself should have several distinguishing characteristics. First, it should be seen in association with a globular ...
... way that would increase the discovery rate for type Ia supernovae from a few thousands (Aldering et al. 2007) to about hundreds of thousands (Riess & Livio 2006) per year. The transient itself should have several distinguishing characteristics. First, it should be seen in association with a globular ...
Week 11 notes
... stars without requiring dark matter. • This theory made specific predictions which were not borne out by observation, and now is (almost) universally believed to be wrong. ...
... stars without requiring dark matter. • This theory made specific predictions which were not borne out by observation, and now is (almost) universally believed to be wrong. ...
eXtremely Fast Tr
... Proposed space-based telescope that seeks to discover several extremely distant supernovae Lawrence Berkeley National Lab & University of California at Berkeley SNAP would orbit a 3-mirror, 2-meter reflecting telescope in a high orbit over the Earth’s poles, circling the globe every 1 or 2 weeks. ...
... Proposed space-based telescope that seeks to discover several extremely distant supernovae Lawrence Berkeley National Lab & University of California at Berkeley SNAP would orbit a 3-mirror, 2-meter reflecting telescope in a high orbit over the Earth’s poles, circling the globe every 1 or 2 weeks. ...
The evolution of spiral galaxies in clusters Kutdemir, Elif
... precise, it has to be implemented since the former is useless at large distances. Integrated spectra are composite, which means that they have contribution of different types of stars at a given wavelength and this mixture changes with wavelength. Here we will not talk about how this combination pro ...
... precise, it has to be implemented since the former is useless at large distances. Integrated spectra are composite, which means that they have contribution of different types of stars at a given wavelength and this mixture changes with wavelength. Here we will not talk about how this combination pro ...
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A real direct distance measurement of an astronomical object is possible only for those objects that are ""close enough"" (within about a thousand parsecs) to Earth. The techniques for determining distances to more distant objects are all based on various measured correlations between methods that work at close distances and methods that work at larger distances. Several methods rely on a standard candle, which is an astronomical object that has a known luminosity.The ladder analogy arises because no one technique can measure distances at all ranges encountered in astronomy. Instead, one method can be used to measure nearby distances, a second can be used to measure nearby to intermediate distances, and so on. Each rung of the ladder provides information that can be used to determine the distances at the next higher rung.