The Reflector: January 2010 - Peterborough Astronomical Association
... star birthing area in Sagittarius to two double stars in Cygnus, a million stars in a ball in Hercules, and finally to the final stages of star life in M57 and M27, all in one night. It’s quite a story and you’ll meet a red giant star—Antares—along the way. Planet buffs will also be able to take in ...
... star birthing area in Sagittarius to two double stars in Cygnus, a million stars in a ball in Hercules, and finally to the final stages of star life in M57 and M27, all in one night. It’s quite a story and you’ll meet a red giant star—Antares—along the way. Planet buffs will also be able to take in ...
Slide 1
... But this isn’t peaceful. Nearly all our satellite galaxies were almost certainly once galaxies of their own that got torn apart by the Milky Way. The Large and Small Magellanic clouds in particular likely used to be decent galaxies. All that’s left, however, are wispy collections of stars. ...
... But this isn’t peaceful. Nearly all our satellite galaxies were almost certainly once galaxies of their own that got torn apart by the Milky Way. The Large and Small Magellanic clouds in particular likely used to be decent galaxies. All that’s left, however, are wispy collections of stars. ...
NearInfrared
... The most important one is the fact that we are less affected by extinction. As light pass though space, dust absorbs a fraction of this. The exact amount depends primarily on the total quantity of dust between the observed and the emitting source. Since dust is formed during the late stages of stell ...
... The most important one is the fact that we are less affected by extinction. As light pass though space, dust absorbs a fraction of this. The exact amount depends primarily on the total quantity of dust between the observed and the emitting source. Since dust is formed during the late stages of stell ...
Goal: To understand the structure and makeup of our own Milky Way
... like looking through a fog or through a forest. • Much like a forest, nearby brush masks our view of the surrounding forest also (thus the stars all over). ...
... like looking through a fog or through a forest. • Much like a forest, nearby brush masks our view of the surrounding forest also (thus the stars all over). ...
Andromeda Galaxy www.AssignmentPoint.com The Andromeda
... Radio emission from the Andromeda Galaxy was first detected by Hanbury Brown and Cyril Hazard at Jodrell Bank Observatory using the 218-ft Transit Telescope, and was announced in 1950 (Earlier observations were made by radio astronomy pioneer Grote Reber in 1940, but were inconclusive, and were lat ...
... Radio emission from the Andromeda Galaxy was first detected by Hanbury Brown and Cyril Hazard at Jodrell Bank Observatory using the 218-ft Transit Telescope, and was announced in 1950 (Earlier observations were made by radio astronomy pioneer Grote Reber in 1940, but were inconclusive, and were lat ...
Searching for Dwarf Galaxies and Population III Star
... Authors: Elizabeth J. Barton, Center for Cosmology, University of California, Irvine Abstract: Metal-free stars in the early universe will inhabit regions of space that have not yet been chemically enriched by earlier supernovae. However, the easiest regions to characterize at early times are volume ...
... Authors: Elizabeth J. Barton, Center for Cosmology, University of California, Irvine Abstract: Metal-free stars in the early universe will inhabit regions of space that have not yet been chemically enriched by earlier supernovae. However, the easiest regions to characterize at early times are volume ...
Full 11x8.5" Calendar, High Resolution - Chandra X
... This deep image from NASA’s Chandra X-ray Observatory shows the Vela pulsar, a neutron star that was formed when a massive star collapsed. In the upper right is a fast moving jet of particles produced by the pulsar. The pulsar is about 1,000 light years from Earth, and makes over 11 complete rotatio ...
... This deep image from NASA’s Chandra X-ray Observatory shows the Vela pulsar, a neutron star that was formed when a massive star collapsed. In the upper right is a fast moving jet of particles produced by the pulsar. The pulsar is about 1,000 light years from Earth, and makes over 11 complete rotatio ...
CH29 The Life of a Star
... It is the name of Galaxy. It has spiral shape. It contains 200 billions stars. Sun is one of the star in Milky way. ...
... It is the name of Galaxy. It has spiral shape. It contains 200 billions stars. Sun is one of the star in Milky way. ...
Exploring The Universe
... strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Each quasar has a huge central black hole and a large disk of gas and dust around ...
... strong radio signal. This object was called a quasar. • quasar quasi-stellar radio sources; very luminous objects that produce energy at a high rate and that are thought to be the most distant objects in the universe • Each quasar has a huge central black hole and a large disk of gas and dust around ...
Practical cosmology with the Local Volume galaxies
... 2. Recent observations of the LV galaxies During the last decade, a lot of comprehensive programs to study the LV sample were undertaken by different observational teams. a) The entire-sky search for new nearby dwarf galaxy candidates was realized by Karachentseva & Karachentsev (1998) and their co- ...
... 2. Recent observations of the LV galaxies During the last decade, a lot of comprehensive programs to study the LV sample were undertaken by different observational teams. a) The entire-sky search for new nearby dwarf galaxy candidates was realized by Karachentseva & Karachentsev (1998) and their co- ...
Estudio de Cúmulos de Galaxias en el Sloan Digital Sky Survey
... – 70% of the SMGs end up as bulge-dominated galaxies, – however, the stellar mass produced in the sub-mm phase in these bright SMGs is only a tiny fraction (0.06%) of the total present day stellar mass density. ...
... – 70% of the SMGs end up as bulge-dominated galaxies, – however, the stellar mass produced in the sub-mm phase in these bright SMGs is only a tiny fraction (0.06%) of the total present day stellar mass density. ...
Multiple choice test questions 2, Winter Semester
... D) Particle accelerators on Earth can reach energies equivalent to the high temperatures of the Electroweak era and have produced particles predicted by the unified theory. E) We have no direct evidence of such a unified force. 23) What happened to all of the quarks that existed freely during the pa ...
... D) Particle accelerators on Earth can reach energies equivalent to the high temperatures of the Electroweak era and have produced particles predicted by the unified theory. E) We have no direct evidence of such a unified force. 23) What happened to all of the quarks that existed freely during the pa ...
Lecture 24, PPT version
... If it’s reasonably clear tonight, there will be one last opportunity to do NL#2. ...
... If it’s reasonably clear tonight, there will be one last opportunity to do NL#2. ...
Chapter 16
... 1. The density wave theory was first proposed by Lindblad in 1960. It is a model for spiral galaxies that proposes that the arms are the result of density waves sweeping around the galaxy. 2. A density wave is a wave in which areas of high and low pressure move through the medium. 3. The density wav ...
... 1. The density wave theory was first proposed by Lindblad in 1960. It is a model for spiral galaxies that proposes that the arms are the result of density waves sweeping around the galaxy. 2. A density wave is a wave in which areas of high and low pressure move through the medium. 3. The density wav ...
Hubble`s Law is the relation between the recession velocity of a
... for the density wave theory, not the other way around. Similarly, the fact that we see star formation implies that elliptical galaxies were once more efficient then spirals, not the other way around. Also, while population I stars are younger than population II stars, not all (or even most) populati ...
... for the density wave theory, not the other way around. Similarly, the fact that we see star formation implies that elliptical galaxies were once more efficient then spirals, not the other way around. Also, while population I stars are younger than population II stars, not all (or even most) populati ...
1 Introduction - Wiley-VCH
... The accretion phenomenon on a compact source in binary systems, or the emission of the hot gas component permeating massive elliptical galaxies or forming the diffuse interstellar medium of gas-rich systems, can be observed in the Xrays. In the last 25 years the advent of new technologies allowed as ...
... The accretion phenomenon on a compact source in binary systems, or the emission of the hot gas component permeating massive elliptical galaxies or forming the diffuse interstellar medium of gas-rich systems, can be observed in the Xrays. In the last 25 years the advent of new technologies allowed as ...
The Milky Way * A Classic Galaxy
... Udalski et al. 2001), as long as one uses infrared luminosities. This is what modern astronomers do. (in the old days, before IR technology, this issue caused a lot of confusion in using Cepheids as distance indicators!) ...
... Udalski et al. 2001), as long as one uses infrared luminosities. This is what modern astronomers do. (in the old days, before IR technology, this issue caused a lot of confusion in using Cepheids as distance indicators!) ...
Searching for stars in high-velocity clouds
... at similar distances to that of M31. In Fig. 1 we show the colour– magnitude plot for the three HVC fields and offsets. For a similar distance to M31 we would expect a cluster of stars (tip of red giant branch) around m I = 21–22 with colours of (V − I ) = 1.2–1.8 (box in Fig. 1). None of the colour ...
... at similar distances to that of M31. In Fig. 1 we show the colour– magnitude plot for the three HVC fields and offsets. For a similar distance to M31 we would expect a cluster of stars (tip of red giant branch) around m I = 21–22 with colours of (V − I ) = 1.2–1.8 (box in Fig. 1). None of the colour ...
Slide 1
... way down the road to [Smith’s], but that's just peanuts to space." -The Hitchhiker’s Guide ...
... way down the road to [Smith’s], but that's just peanuts to space." -The Hitchhiker’s Guide ...
Document
... In light of the uncertainties that still exist in current models, observational constraints are required to further develop our understanding of what regulates star formation in massive galaxies. In particular, look-back studies to assess empirically when and how the red sequence emerged are crucial ...
... In light of the uncertainties that still exist in current models, observational constraints are required to further develop our understanding of what regulates star formation in massive galaxies. In particular, look-back studies to assess empirically when and how the red sequence emerged are crucial ...
ASPEN WORKSHOP 2003
... ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above 0.35 for about 700 Myears, but NOT for face-on HDF application: rest frame B morphol ...
... ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above 0.35 for about 700 Myears, but NOT for face-on HDF application: rest frame B morphol ...
The Hubble Ultra Deep Field Project Overview
... The velocity you calculated for this star is much less than the speed of light, so we could have found a decent approximation to the answer using z = v/c. But, if you use the approximation equation to calculate the recession velocity based on the spectral shift from the spectrum of a distant galaxy ...
... The velocity you calculated for this star is much less than the speed of light, so we could have found a decent approximation to the answer using z = v/c. But, if you use the approximation equation to calculate the recession velocity based on the spectral shift from the spectrum of a distant galaxy ...
It is only in the past few years that humanity... limits of the heliosphere. A fortunate confluence of missions has... 1. Magnetic Effects in the Heliosheath and Astrosheaths (Prof. Merav...
... simply be due to spots on the surface making stars appear colder than their fundamental parameters would predict, but it could also be due to an increase in the stellar radius. The latter has huge ramifications for the characterization of transiting exoplanets around M dwarfs. Our group is collabora ...
... simply be due to spots on the surface making stars appear colder than their fundamental parameters would predict, but it could also be due to an increase in the stellar radius. The latter has huge ramifications for the characterization of transiting exoplanets around M dwarfs. Our group is collabora ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... At first it was not clear what the source of these radio pulses could be because of the extremely short period. The discovery of a pulsar in the Crab nebula, a well-‐known supernova remnant (t ...
... At first it was not clear what the source of these radio pulses could be because of the extremely short period. The discovery of a pulsar in the Crab nebula, a well-‐known supernova remnant (t ...
Galaxy Evolution
... Fig. 2.—Top: Determination of cluster and group baryon fractions within r500 as a function of M500 (bottom axis) and velocity dispersion (top axis). X-ray gas mass fractions from Vikhlinin et al. (2006; circles) and Gastaldello et al. (2006; triangles) and the stellar mass fractions ( BCG +ICL+galax ...
... Fig. 2.—Top: Determination of cluster and group baryon fractions within r500 as a function of M500 (bottom axis) and velocity dispersion (top axis). X-ray gas mass fractions from Vikhlinin et al. (2006; circles) and Gastaldello et al. (2006; triangles) and the stellar mass fractions ( BCG +ICL+galax ...
Galaxy Zoo
Galaxy Zoo is a crowdsourced astronomy project which invites people to assist in the morphological classification of large numbers of galaxies. (e.g.) It is an example of citizen science as it enlists the help of members of the public to help in scientific research. There have been seven versions up to July 2014, which are outlined in this article. Galaxy Zoo is part of the Zooniverse, a group of citizen science projects.