Galaxy Powerpoint Notes
... Discovery and Creation The discovery of galaxies was first announced on January 1st, 1925 by Edwin Hubble, who was the first astronomer to prove that there were other galaxies outside of our own Milky Way. Prior to his announcement, in 1922-1923, Edwin Hubble was searching for Cepheid variables (a t ...
... Discovery and Creation The discovery of galaxies was first announced on January 1st, 1925 by Edwin Hubble, who was the first astronomer to prove that there were other galaxies outside of our own Milky Way. Prior to his announcement, in 1922-1923, Edwin Hubble was searching for Cepheid variables (a t ...
The Classification of Galaxies By Daniel Underwood Contents The
... References Zeilik & Gregory – Introductory Astronomy and Astrophysics, ...
... References Zeilik & Gregory – Introductory Astronomy and Astrophysics, ...
The Cosmological Distance Ladder
... Implications of the Hubble constant Ho is (velocity/distance) so has the dimensions of (1/time). 1/Ho is the expansion age of the universe (how old the Universe would be if no forces acting) = 15.3 billion yrs For simplest model universe with only gravity acting, age of universe would be 10.2 billi ...
... Implications of the Hubble constant Ho is (velocity/distance) so has the dimensions of (1/time). 1/Ho is the expansion age of the universe (how old the Universe would be if no forces acting) = 15.3 billion yrs For simplest model universe with only gravity acting, age of universe would be 10.2 billi ...
File 11 - School of Astronomy, IPM
... • M87 is Super giant galaxy. • Also known as M87, Virgo A or NGC ...
... • M87 is Super giant galaxy. • Also known as M87, Virgo A or NGC ...
GammaRay Bursts, the Strongest Explosions in the Universe.
... GRBs are fascinating because they are the brightest objects in the sky corresponding to the strongest explosions that take place in the Universe. Not surprisingly a GRB at a record redshift of 8.1 is the most distant object seen so far. GRBs are fascinating bec ...
... GRBs are fascinating because they are the brightest objects in the sky corresponding to the strongest explosions that take place in the Universe. Not surprisingly a GRB at a record redshift of 8.1 is the most distant object seen so far. GRBs are fascinating bec ...
Introduction
... Fig. 1.1 compares images of two well-known elliptical galaxies. These galaxies have similar apparent luminosities and angular sizes; one is a little more elongated than the other, but otherwise there seems not much difference between them. Fig. 1.2, a comparison taking relative distance into account ...
... Fig. 1.1 compares images of two well-known elliptical galaxies. These galaxies have similar apparent luminosities and angular sizes; one is a little more elongated than the other, but otherwise there seems not much difference between them. Fig. 1.2, a comparison taking relative distance into account ...
Small galaxies are growing smaller
... have the spectacular appearance we see in “coffee table” books. Indeed, in the early days of extragalactic astronomy it was thought that most galaxies were of rather similar (large) luminosities. Specifically, Edwin Hubble (1936) and his contemporaries believed that the luminosity function (LF) of g ...
... have the spectacular appearance we see in “coffee table” books. Indeed, in the early days of extragalactic astronomy it was thought that most galaxies were of rather similar (large) luminosities. Specifically, Edwin Hubble (1936) and his contemporaries believed that the luminosity function (LF) of g ...
18_Testbank - Lick Observatory
... a star supported against gravity by ordinary pressure. C) The white dwarf immediately collapses into a black hole, disappearing from view. D) A white dwarf can never gain enough mass to reach the limit because a strong stellar wind prevents the material from reaching it in the first place. Answer: A ...
... a star supported against gravity by ordinary pressure. C) The white dwarf immediately collapses into a black hole, disappearing from view. D) A white dwarf can never gain enough mass to reach the limit because a strong stellar wind prevents the material from reaching it in the first place. Answer: A ...
http://www.highpoint.edu/~afuller/PHY-1050
... the outer core to go into free-fall. • During the collapse, speeds can reach almost 70,000 km/s (0.25 c), and within about one second a volume the size of Earth has been compressed to a diameter of 100 km. • This process takes roughly a quarter of a second. ...
... the outer core to go into free-fall. • During the collapse, speeds can reach almost 70,000 km/s (0.25 c), and within about one second a volume the size of Earth has been compressed to a diameter of 100 km. • This process takes roughly a quarter of a second. ...
Interacting Galaxies
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
... Far from being solitary and isolated island universes, many galaxies are found to be interacting. Their close encounters can lead to spectacular mergers and spawn vast amounts of new star formation. Astronomers estimate that in the nearby universe, 1 out of every 20 gas-rich disk galaxies, like our ...
XRaySNR_sm - Gettysburg College
... 4) While unlikely, students may find a fit that looks good, but may have “wrong” values for the parameters. If this happens, don’t grade them harshly! This happens to professional astronomers as well when fitting X-ray spectra, so use this as a teaching moment: even scientists make mistakes. 5) Tell ...
... 4) While unlikely, students may find a fit that looks good, but may have “wrong” values for the parameters. If this happens, don’t grade them harshly! This happens to professional astronomers as well when fitting X-ray spectra, so use this as a teaching moment: even scientists make mistakes. 5) Tell ...
Slide 1
... • TYCHO WAS BOTH AN “EXPERIMENTALIST” AND A “THEORIST” • HE MUST HAVE BEEN A VERY GOOD MACHINIST – V.E. THOREN WRITES, “Because of the number and variety of instruments made and described by Tycho, previous commentators have assumed that he made instruments for the sheer sake of keeping his instrume ...
... • TYCHO WAS BOTH AN “EXPERIMENTALIST” AND A “THEORIST” • HE MUST HAVE BEEN A VERY GOOD MACHINIST – V.E. THOREN WRITES, “Because of the number and variety of instruments made and described by Tycho, previous commentators have assumed that he made instruments for the sheer sake of keeping his instrume ...
Elliptical galaxies
... High-redshift early type galaxies “Old galaxies in the young Universe” (z ~ 1.6 – 1.9) Stellar mass ~ 1011 Msun ...
... High-redshift early type galaxies “Old galaxies in the young Universe” (z ~ 1.6 – 1.9) Stellar mass ~ 1011 Msun ...
Andromeda: Daughter of Cassiopeia Ἀνδρομέδη Kaitlyn Heaton
... The Andromeda Galaxy. (Shown in figure 2) is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. [2] It is a spiral galaxy approximately 2.5 million light years distant. In the past, it was also referr ...
... The Andromeda Galaxy. (Shown in figure 2) is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. [2] It is a spiral galaxy approximately 2.5 million light years distant. In the past, it was also referr ...
Sec 30.1 - Highland High School
... After reasoning there were globular clusters orbiting the center of the Milky Way, astronomers then used RR Lyrae variables to determine the distances to them. ...
... After reasoning there were globular clusters orbiting the center of the Milky Way, astronomers then used RR Lyrae variables to determine the distances to them. ...
X-Ray Astronomy of Supernova Remnants
... 4) While unlikely, students may find a fit that looks good, but may have “wrong” values for the parameters. If this happens, don’t grade them harshly! This happens to professional astronomers as well when fitting X-ray spectra, so use this as a teaching moment: even scientists make mistakes. 5) Tell ...
... 4) While unlikely, students may find a fit that looks good, but may have “wrong” values for the parameters. If this happens, don’t grade them harshly! This happens to professional astronomers as well when fitting X-ray spectra, so use this as a teaching moment: even scientists make mistakes. 5) Tell ...
Galaxies
... probably because of collisions with intracluster gas It is believed this gas is primordial—dating from the very early days of the Universe. There is not nearly enough of it to account for most of the matter in galaxy clusters. ...
... probably because of collisions with intracluster gas It is believed this gas is primordial—dating from the very early days of the Universe. There is not nearly enough of it to account for most of the matter in galaxy clusters. ...
Tycho Brahe
... distances away from Earth. This distance puts it in the Ptolemaic models region of fixed stars. • This was another blow to the geocentric beliefs. ...
... distances away from Earth. This distance puts it in the Ptolemaic models region of fixed stars. • This was another blow to the geocentric beliefs. ...
Extragalactic Distances from Planetary Nebulae
... To produce 600 L of [O III] emission, a central star must have a luminosity of L > 6,000 L. A central star with L > 6,000 L must be more massive than M > 0.6 M. Such stars come from M > 2 M progenitors. ...
... To produce 600 L of [O III] emission, a central star must have a luminosity of L > 6,000 L. A central star with L > 6,000 L must be more massive than M > 0.6 M. Such stars come from M > 2 M progenitors. ...
Estudio de Cúmulos de Galaxias en el Sloan Digital Sky Survey
... – the UV stellar emission is reradiated by the dust in farinfrared/submm bands, ...
... – the UV stellar emission is reradiated by the dust in farinfrared/submm bands, ...
PDF hosted at the Radboud Repository of the Radboud University
... core-collapse supernovae leave behind a compact remnant, i.e. a neutron star or a black hole, while type Ia supernovae do not; type Ia supernova explosions are believed to completely disrupt their progenitor stars, leaving behind only a rapidly expanding shell of material that has been partially pro ...
... core-collapse supernovae leave behind a compact remnant, i.e. a neutron star or a black hole, while type Ia supernovae do not; type Ia supernova explosions are believed to completely disrupt their progenitor stars, leaving behind only a rapidly expanding shell of material that has been partially pro ...
Building` a Galaxy SED
... Practical problem: galaxies are biased tracers of underlying mass distribution. In order to use galaxies to measure underlying mass distribution, we must understand galaxies. ...
... Practical problem: galaxies are biased tracers of underlying mass distribution. In order to use galaxies to measure underlying mass distribution, we must understand galaxies. ...
The XMM-Newton Observatory
... XMM-Newton is an X-ray satellite launched into Earth orbit on December 10, 1999 by the European Space Agency (ESA). XMM-Newton is actually a fully-functioning observatory, carrying three very advanced X-ray telescopes. They each contain 58 highprecision concentric mirrors, nested to offer the larges ...
... XMM-Newton is an X-ray satellite launched into Earth orbit on December 10, 1999 by the European Space Agency (ESA). XMM-Newton is actually a fully-functioning observatory, carrying three very advanced X-ray telescopes. They each contain 58 highprecision concentric mirrors, nested to offer the larges ...
The High Resolution Camera CXC Newsletter
... a nearby star with a dusty disk. On the main sequence, there are two different mechanisms that generate stellar X-ray emission. Massive O and B stars have radiatively driven winds, and because these winds are unstable, X-ray emitting shocks form. On the other end to the main sequence are the cool st ...
... a nearby star with a dusty disk. On the main sequence, there are two different mechanisms that generate stellar X-ray emission. Massive O and B stars have radiatively driven winds, and because these winds are unstable, X-ray emitting shocks form. On the other end to the main sequence are the cool st ...
Lecture 4
... • Warmest observed stars are low-massive; their neutrino luminosity <= 0.01 of modified Urca • Coldest observed stars are more massive; their neutrino luminosity >= 100 of modified Urca ...
... • Warmest observed stars are low-massive; their neutrino luminosity <= 0.01 of modified Urca • Coldest observed stars are more massive; their neutrino luminosity >= 100 of modified Urca ...
History of supernova observation
The known history of supernova observation goes back to 185 CE, when, supernova SN 185 appeared, the oldest appearance of a supernova recorded by humankind. Several additional supernovae within the Milky Way galaxy have been recorded since that time, with SN 1604 being the most recent supernova to be observed in this galaxy.Since the development of the telescope, the field of supernova discovery has expanded to other galaxies. These occurrences provide important information on the distances of galaxies. Successful models of supernova behavior have also been developed, and the role of supernovae in the star formation process is now increasingly understood.