Chapter 1 Our Place in the Universe
... • If the universe is expanding then it is getting bigger so we can see further than just the age of the universe times the speed of light. • This is a common mistake made by astronomers and astrophysicist when thinking cosmologically. It works for small non cosmological distances. ...
... • If the universe is expanding then it is getting bigger so we can see further than just the age of the universe times the speed of light. • This is a common mistake made by astronomers and astrophysicist when thinking cosmologically. It works for small non cosmological distances. ...
astronomy
... Discuss the nature of electromagnetic radiation, and tell how that radiation transfers energy and information through interstellar space. List the major regions of the electromagnetic spectrum and explain how the properties of the Earth’s atmosphere affect our ability to make astronomical observatio ...
... Discuss the nature of electromagnetic radiation, and tell how that radiation transfers energy and information through interstellar space. List the major regions of the electromagnetic spectrum and explain how the properties of the Earth’s atmosphere affect our ability to make astronomical observatio ...
PEGASUS, THE FLYING HORSE Pegasus is a constellation in the
... with a redshift of 0.0027. It was discovered by musician-astronomer William Herschel in 1784 and was later one of the first nebulous objects to be described as "spiral" by William Parsons. Another of Pegasus's galaxies is NGC 7742, a Type 2 Seyfert galaxy. Located at a distance of 77 million light-y ...
... with a redshift of 0.0027. It was discovered by musician-astronomer William Herschel in 1784 and was later one of the first nebulous objects to be described as "spiral" by William Parsons. Another of Pegasus's galaxies is NGC 7742, a Type 2 Seyfert galaxy. Located at a distance of 77 million light-y ...
CH. 7 - science1d
... In all societies, people have looked at the night sky for inspiration, to find directions, to decide when to plant or harvest crops, or just to appreciate its great beauty (Figure 7.1). “Celestial” is a term that refers to the sky. Objects we can see in the sky are called celestial objects. The Sun, ...
... In all societies, people have looked at the night sky for inspiration, to find directions, to decide when to plant or harvest crops, or just to appreciate its great beauty (Figure 7.1). “Celestial” is a term that refers to the sky. Objects we can see in the sky are called celestial objects. The Sun, ...
A Spectroscopically Confirmed Excess of 24 micron Sources in a
... to determine rest-frame absolute magnitudes (Vega) and Kcorrections. As input, we use the MAG− AUTO photometry from the g′ BV r′ R imaging and assumed minimum photometric uncertainties in each bandpass of 0.05 mag. The photometry has been corrected for foreground Galactic extinction using the Schleg ...
... to determine rest-frame absolute magnitudes (Vega) and Kcorrections. As input, we use the MAG− AUTO photometry from the g′ BV r′ R imaging and assumed minimum photometric uncertainties in each bandpass of 0.05 mag. The photometry has been corrected for foreground Galactic extinction using the Schleg ...
Lecture 13 Local group chapter 4 of S+G
... Andromeda), a smaller spiral M33 and lots of (>35 galaxies), most of which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and br ...
... Andromeda), a smaller spiral M33 and lots of (>35 galaxies), most of which are dwarf ellipticals and irregulars with low mass; most are satellites of MW, M31 or M33 The gravitational interaction between these systems is complex but the local group is apparently bound. Major advantages – close and br ...
The cosmic distance scale
... The rotational velocity of a spiral galaxy can be measured from the HI integrated spectrum. The HI gas in a spiral follows very closely circular orbits at a speed Vc . If the galaxy is inclined at an angle i to the line of sight, the observed line of sight velocity will vary from + Vc sin i to - Vc ...
... The rotational velocity of a spiral galaxy can be measured from the HI integrated spectrum. The HI gas in a spiral follows very closely circular orbits at a speed Vc . If the galaxy is inclined at an angle i to the line of sight, the observed line of sight velocity will vary from + Vc sin i to - Vc ...
Galaxy Formation and Evolution Open Problems
... • moderately old stars with low specific angular momentum. • Wide range of metallicity • Triaxial shape (central bar) • Central supermassive BH Stellar Halo • 109 old and metal poor stars (Pop.II) • 150 globular clusters (13 Gyr) • <0.2% Galaxy mass, 2% of the light •Dark Halo ...
... • moderately old stars with low specific angular momentum. • Wide range of metallicity • Triaxial shape (central bar) • Central supermassive BH Stellar Halo • 109 old and metal poor stars (Pop.II) • 150 globular clusters (13 Gyr) • <0.2% Galaxy mass, 2% of the light •Dark Halo ...
File - Mr. Gray`s Class
... galaxies has produced a complex new system. Some are seen to be torn by violence - huge "engines" at their centers seem to be spewing out energetic "jets'' of high -speed material that sometimes distort the shape of their galaxy. The most energetic of these "active" galaxies are called quasars by as ...
... galaxies has produced a complex new system. Some are seen to be torn by violence - huge "engines" at their centers seem to be spewing out energetic "jets'' of high -speed material that sometimes distort the shape of their galaxy. The most energetic of these "active" galaxies are called quasars by as ...
Ursa Major, the Great Bear
... M101 is a splendid face-on galaxy, which shows a distinct asymmetry in long exposure photographs. The giant spiral disk of stars, dust, and gas is 170,000 light-years across, almost twice the size of our Milky Way Galaxy. M101 is estimated to contain at least one trillion stars. M101 lies on the e ...
... M101 is a splendid face-on galaxy, which shows a distinct asymmetry in long exposure photographs. The giant spiral disk of stars, dust, and gas is 170,000 light-years across, almost twice the size of our Milky Way Galaxy. M101 is estimated to contain at least one trillion stars. M101 lies on the e ...
Formation of z~6 Quasars from Hierarchical Galaxy Mergers
... ¥ Traces mergers throughout redshift ¥ The most massive progenitors at each redshift are traced by tags to identify earlier progenitors ¥ Groups that contribute >10% of the halo mass at each time step are progenitors ¥ This will give the history of our suspect ...
... ¥ Traces mergers throughout redshift ¥ The most massive progenitors at each redshift are traced by tags to identify earlier progenitors ¥ Groups that contribute >10% of the halo mass at each time step are progenitors ¥ This will give the history of our suspect ...
from z=0 to z=1
... 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significantly higher SFR, higher attenuation, higher stellar mass, and higher correlation length than LBGs. 7. At intermediate redshifts of z~0.6, UV selected galaxies show m ...
... 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significantly higher SFR, higher attenuation, higher stellar mass, and higher correlation length than LBGs. 7. At intermediate redshifts of z~0.6, UV selected galaxies show m ...
Evolved Stellar Populations
... …there are also sub-structures Discovery of an LMC star at 220 from the centre. Milky Way streams have been discovered using RGB stars (photometry + kinematics). Sub-structures tracing the dynamical history exists around M31 and other LG galaxies. Many galaxies have also extended halos. W ...
... …there are also sub-structures Discovery of an LMC star at 220 from the centre. Milky Way streams have been discovered using RGB stars (photometry + kinematics). Sub-structures tracing the dynamical history exists around M31 and other LG galaxies. Many galaxies have also extended halos. W ...
Space Science Chapter 10.1 textbook
... hese are extraordinary times for anyone who wants to be wowed by the universe. Discoveries are being made at a pace not matched since the development of the original telescopes. The Hubble Space Telescope, for example, has provided us with a wealth of information, including this image of some of th ...
... hese are extraordinary times for anyone who wants to be wowed by the universe. Discoveries are being made at a pace not matched since the development of the original telescopes. The Hubble Space Telescope, for example, has provided us with a wealth of information, including this image of some of th ...
Studying the Universe Studying the Universe
... wavelengths. A different type of telescope is required to detect each type of radiation. For example, infrared telescopes have polished mirrors similar to those of reflecting telescopes, but infrared telescopes are more sensitive to infrared waves than to visible light waves. As you can see in Figur ...
... wavelengths. A different type of telescope is required to detect each type of radiation. For example, infrared telescopes have polished mirrors similar to those of reflecting telescopes, but infrared telescopes are more sensitive to infrared waves than to visible light waves. As you can see in Figur ...
Week8Lecture1
... The galactic halo and globular clusters formed very early; the halo is essentially spherical. All the stars in the halo are very old, and there is no gas and dust. The galactic disk is where the youngest stars are, as well as star formation regions – emission nebulae, large clouds of gas and dust. S ...
... The galactic halo and globular clusters formed very early; the halo is essentially spherical. All the stars in the halo are very old, and there is no gas and dust. The galactic disk is where the youngest stars are, as well as star formation regions – emission nebulae, large clouds of gas and dust. S ...
- Cosmotography
... it an LMC-analogue (and not formally a dwarf by some definitions), but with a much higher star formation rate. It is strongly suspected to have recently interacted with another galaxy based on various signatures including peculiar kinematics in its cold gas and HII regions (Hartmann et al. 1986; Hun ...
... it an LMC-analogue (and not formally a dwarf by some definitions), but with a much higher star formation rate. It is strongly suspected to have recently interacted with another galaxy based on various signatures including peculiar kinematics in its cold gas and HII regions (Hartmann et al. 1986; Hun ...
CONSTELLATIONS OF THE SOUTHERN SKY VOLANS
... Beta Volantis is the brightest star in Volans constellation. It has an apparent visual magnitude of 3.77 and is 107.5 light years distant from the Sun. It is an orange giant with the stellar classification K1III. It has 1.62 solar masses and is 41 times more luminous than the Sun. Gamma Volantis is ...
... Beta Volantis is the brightest star in Volans constellation. It has an apparent visual magnitude of 3.77 and is 107.5 light years distant from the Sun. It is an orange giant with the stellar classification K1III. It has 1.62 solar masses and is 41 times more luminous than the Sun. Gamma Volantis is ...
1-structure-of-the-universe-and-the-big-bang
... C) shift toward the blue end of the spectrum D) shift toward the red end of the spectrum 17. In a Doppler red shift, the observed wavelengths of light from distant celestial objects appear closer to the red end of the spectrum than light from similar nearby celestial objects. The explanation for the ...
... C) shift toward the blue end of the spectrum D) shift toward the red end of the spectrum 17. In a Doppler red shift, the observed wavelengths of light from distant celestial objects appear closer to the red end of the spectrum than light from similar nearby celestial objects. The explanation for the ...
Dark Matter— More Than Meets The Eye
... of the mass of the universe) is dark matter, nonluminous matter, matter that cannot be observed with telescopes. It is invisible, not because it is far away, but because it neither emits nor absorbs light. So, could one answer to our beaker situation be that 90% of its contents were dark matter? ...
... of the mass of the universe) is dark matter, nonluminous matter, matter that cannot be observed with telescopes. It is invisible, not because it is far away, but because it neither emits nor absorbs light. So, could one answer to our beaker situation be that 90% of its contents were dark matter? ...
0708 - Astronomy
... If the Universe is expanding, does that also mean that the Galaxy and the Solar system are expanding? ...
... If the Universe is expanding, does that also mean that the Galaxy and the Solar system are expanding? ...
3. Cosmology and the Origin and Evolution of Galaxies
... of the gas and infer a dynamical gas-mass. ...
... of the gas and infer a dynamical gas-mass. ...
Lecture 17, PPT version
... Gamma-ray bursts are all found in galaxies other than the Milky Way and sometimes they have “optical afterglows”. ...
... Gamma-ray bursts are all found in galaxies other than the Milky Way and sometimes they have “optical afterglows”. ...
Spring 2017 - Astronomers of Humboldt
... the research being done in his “Gravitational Research Lab” and the work they are doing to test Einstein’s theory of relativity. As one of our members remarked, “I am so proud to live so near to a top tier university that is always at the cutting edge of contemporary research”. HSU Professor Paola H ...
... the research being done in his “Gravitational Research Lab” and the work they are doing to test Einstein’s theory of relativity. As one of our members remarked, “I am so proud to live so near to a top tier university that is always at the cutting edge of contemporary research”. HSU Professor Paola H ...
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.