![Constraining the star formation histories of spiral bulges](http://s1.studyres.com/store/data/014289508_1-42a113be5a91e7b6ff6ed654f1faa842-300x300.png)
Constraining the star formation histories of spiral bulges
... processes have been proposed to produce this pre-enrichment. One possibility is an initial mass function (IMF) biased towards highmass stars in the early stages of galaxy formation. In this scenario the first few generations of stars generate large quantities of metals (Gibson & Matteucci 1997; Vazd ...
... processes have been proposed to produce this pre-enrichment. One possibility is an initial mass function (IMF) biased towards highmass stars in the early stages of galaxy formation. In this scenario the first few generations of stars generate large quantities of metals (Gibson & Matteucci 1997; Vazd ...
OUR SOLAR SYSTEM
... Our star’s luminosity is gradually increasing, which pushes the habitable zone outward. In about a billion years, the habitable zone will leave Earth roasting outside its inner edge. But the Red Planet will experience a more temperate period lasting a few billion years as the Sun transitions into it ...
... Our star’s luminosity is gradually increasing, which pushes the habitable zone outward. In about a billion years, the habitable zone will leave Earth roasting outside its inner edge. But the Red Planet will experience a more temperate period lasting a few billion years as the Sun transitions into it ...
Summary Of the Structure of the Milky Way
... • The Distribution of stars can reveal part of the disk-like nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allo ...
... • The Distribution of stars can reveal part of the disk-like nature of the Milky Way galaxy, but are not “deep” enough probes to fully reveal the structure of the Milky Way. • Open clusters can define the thickness of the Milky Way’s thin disk where star formation is active. • Globular clusters allo ...
PPT - IAC
... sources typically QSO, starburst galaxies, or even GRB - emission in Lya. The cosmic web gas is an ionized plasma undergoing recombination, and light scattering ... so it should produce an emission spectrum ...
... sources typically QSO, starburst galaxies, or even GRB - emission in Lya. The cosmic web gas is an ionized plasma undergoing recombination, and light scattering ... so it should produce an emission spectrum ...
Article PDF - IOPscience
... and broadband colors with the clumpiness parameter S, the uniquely large asymmetries of 66 galaxies undergoing mergers, and the correlation of bulge to total light ratios, and stellar masses, with the concentration index. As an obvious goal is to use this system at high redshifts to trace evolution, ...
... and broadband colors with the clumpiness parameter S, the uniquely large asymmetries of 66 galaxies undergoing mergers, and the correlation of bulge to total light ratios, and stellar masses, with the concentration index. As an obvious goal is to use this system at high redshifts to trace evolution, ...
– 1 – 1. Galaxy Observations 1.1.
... galaxies of a fixed luminosity are even more metal-poor than local galaxies. They find a M − Z relation for oxygen among Lyman break galaxies at mean z of 2. At this redshift, there are large variations in rest-frame optical M/L due to variations in the star formation rate affecting the UV continuum ...
... galaxies of a fixed luminosity are even more metal-poor than local galaxies. They find a M − Z relation for oxygen among Lyman break galaxies at mean z of 2. At this redshift, there are large variations in rest-frame optical M/L due to variations in the star formation rate affecting the UV continuum ...
Are Gamma-Ray Bursts good Star Formation Indicators?
... preference for low metallicity environments. For example, Ramirez-Ruiz et al. (2002 ApJ 565 L9) found that GRBs located in the outer parts of their host galaxies, presumably with lower metallicity, are somewhat brighter then those closer to the centres. Fynbo et al. (2003 A&A 406 L63) pointed out th ...
... preference for low metallicity environments. For example, Ramirez-Ruiz et al. (2002 ApJ 565 L9) found that GRBs located in the outer parts of their host galaxies, presumably with lower metallicity, are somewhat brighter then those closer to the centres. Fynbo et al. (2003 A&A 406 L63) pointed out th ...
Slide 1
... including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. ...
... including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies. ...
margarita2007
... Constantly improving data are repeatedly testing this theory. The main ingredients have been checked several different ways. There exist no convincing disagreements, as far as I can see. Possible problems may be due to the poorly understood physics of gas, stars,and massive black holes. ...
... Constantly improving data are repeatedly testing this theory. The main ingredients have been checked several different ways. There exist no convincing disagreements, as far as I can see. Possible problems may be due to the poorly understood physics of gas, stars,and massive black holes. ...
bars and secular evolution
... See mean surface brightness V increase by ~ 2 mag from z = 0.2 to z >1 - good agreement with expectation from theory. Much as expected from passive evolution. Little change in surface density with z, suggests that galaxies increase in size as they accrete gas - inside out disk formation This was a ...
... See mean surface brightness V increase by ~ 2 mag from z = 0.2 to z >1 - good agreement with expectation from theory. Much as expected from passive evolution. Little change in surface density with z, suggests that galaxies increase in size as they accrete gas - inside out disk formation This was a ...
An Ancient Universe
... the Milky Way galaxy, but the same pattern would be spread out like this a “spectrum” and it is something observed by someone on a different galaxy. All the whose properties astronomers are very good at galaxies are stretching away from all the other galaxies. measuring. Each element leaves a unique ...
... the Milky Way galaxy, but the same pattern would be spread out like this a “spectrum” and it is something observed by someone on a different galaxy. All the whose properties astronomers are very good at galaxies are stretching away from all the other galaxies. measuring. Each element leaves a unique ...
No Slide Title
... Galactic Wonderings for 40 What type of galaxies have shapes that don’t fit into the Hubble classification for galaxies because they are neither spiral or elliptical in shape? ...
... Galactic Wonderings for 40 What type of galaxies have shapes that don’t fit into the Hubble classification for galaxies because they are neither spiral or elliptical in shape? ...
The Magellan 20 Telescope Science Goals
... (V <~ 1000 km/sec) galaxies (see de Zeeuw et al. 2002). The Magellan 20 telescope could extend the volume of the Universe available for study currently by a factor of over 300,000 in the single-DM adaptive mode. The vast increase in volume is critical in being able to define large samples of galaxie ...
... (V <~ 1000 km/sec) galaxies (see de Zeeuw et al. 2002). The Magellan 20 telescope could extend the volume of the Universe available for study currently by a factor of over 300,000 in the single-DM adaptive mode. The vast increase in volume is critical in being able to define large samples of galaxie ...
ISP 205: Visions of the Universe
... • If the universe is expanding then it is getting bigger so we can see further than just the speed of light times the age of the universe. c • 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 speed of light times the age of the universe. c • This is a common mistake made by astronomers and astrophysicist when thinking cosmologically. It works for small non cosmological distances. ...
Integrative Studies 410 Our Place in the Universe
... – Cut off in brightness corresponds to a cut off at a certain distance. ...
... – Cut off in brightness corresponds to a cut off at a certain distance. ...
A n A n c i e n... How Astronomers Know the Vast Scale of Cosmic Time
... the Milky Way galaxy, but the same pattern would be spread out like this a “spectrum” and it is something observed by someone on a different galaxy. All the whose properties astronomers are very good at galaxies are stretching away from all the other galaxies. measuring. Each element leaves a unique ...
... the Milky Way galaxy, but the same pattern would be spread out like this a “spectrum” and it is something observed by someone on a different galaxy. All the whose properties astronomers are very good at galaxies are stretching away from all the other galaxies. measuring. Each element leaves a unique ...
Introduction
... guidance, advice and constructive criticism, this thesis would not have been possible. I am very much indebted to him for all his time and energy spent on my supervision. I also wish to thank Jonathan Davies, for giving me the fantastic opportunity to research extragalactic astronomy at Cardiff Univ ...
... guidance, advice and constructive criticism, this thesis would not have been possible. I am very much indebted to him for all his time and energy spent on my supervision. I also wish to thank Jonathan Davies, for giving me the fantastic opportunity to research extragalactic astronomy at Cardiff Univ ...
Astro-MilkyWay
... This chapter plays three parts in our cosmic drama. First, it introduces the concept of a galaxy. Second, it discusses our home, the Milky Way Galaxy, a natural object of our curiosity. Third, it elaborates our story of stars by introducing us to galaxies, the communities in which stars exist. ...
... This chapter plays three parts in our cosmic drama. First, it introduces the concept of a galaxy. Second, it discusses our home, the Milky Way Galaxy, a natural object of our curiosity. Third, it elaborates our story of stars by introducing us to galaxies, the communities in which stars exist. ...
Small Wonders: Ursa Minor
... or 2000. Today, Polaris is at 90 degrees declination (well 89 degrees 15 minutes anyway) and Alderamin is at 62.5 degrees declination. In 5000 years or so, Alderamin will nearly be at 90 degrees declination while Polaris will have drifted away. Polaris will continue to move closer to the pole until ...
... or 2000. Today, Polaris is at 90 degrees declination (well 89 degrees 15 minutes anyway) and Alderamin is at 62.5 degrees declination. In 5000 years or so, Alderamin will nearly be at 90 degrees declination while Polaris will have drifted away. Polaris will continue to move closer to the pole until ...
Galaxy Structure
... smaller group of three large and over 30 small galaxies, and is the second largest (after the Andromeda Galaxy M31) but perhaps the most massive member of this group. The Milky Way is most likely a BARRED SPIRAL GALAXY of Hubble type SBc. We are situated within the outer regions of its spiral disk, ...
... smaller group of three large and over 30 small galaxies, and is the second largest (after the Andromeda Galaxy M31) but perhaps the most massive member of this group. The Milky Way is most likely a BARRED SPIRAL GALAXY of Hubble type SBc. We are situated within the outer regions of its spiral disk, ...
Chapter 15
... This chapter plays three parts in our cosmic drama. First, it introduces the concept of a galaxy. Second, it discusses our home, the Milky Way Galaxy, a natural object of our curiosity. Third, it elaborates our story of stars by introducing us to galaxies, the communities in which stars exist. ...
... This chapter plays three parts in our cosmic drama. First, it introduces the concept of a galaxy. Second, it discusses our home, the Milky Way Galaxy, a natural object of our curiosity. Third, it elaborates our story of stars by introducing us to galaxies, the communities in which stars exist. ...
The Milky Way
... This chapter plays three parts in our cosmic drama. First, it introduces the concept of a galaxy. Second, it discusses our home, the Milky Way Galaxy, a natural object of our curiosity. Third, it elaborates our story of stars by introducing us to galaxies, the communities in which stars exist. ...
... This chapter plays three parts in our cosmic drama. First, it introduces the concept of a galaxy. Second, it discusses our home, the Milky Way Galaxy, a natural object of our curiosity. Third, it elaborates our story of stars by introducing us to galaxies, the communities in which stars exist. ...
Stellar populations in the nuclear regions of nearby radio galaxies
... resolution in the blue and l7900–9400 A the red. In the 1997 run, in which we assessed the viability of the project, we used the R600B and R600R gratings instead. This setup and l8510–9320 A range in the blue and covers the l3810–5420 A red arm, at 2.6- and 1.7-Å resolution respectively. Just o ...
... resolution in the blue and l7900–9400 A the red. In the 1997 run, in which we assessed the viability of the project, we used the R600B and R600R gratings instead. This setup and l8510–9320 A range in the blue and covers the l3810–5420 A red arm, at 2.6- and 1.7-Å resolution respectively. Just o ...
The role of black holes in galaxy formation and evolution
... Galaxies come in two basic types: ‗football-shaped‘ ellipticals and ‗disk-shaped‘ spirals (Fig. 1). Spirals contain plenty of cold gas, which forms stars, whereas the gas in ellipticals is too hot to form stars. Thus, ellipticals lack the young blue stars that are usually seen in spirals, and are g ...
... Galaxies come in two basic types: ‗football-shaped‘ ellipticals and ‗disk-shaped‘ spirals (Fig. 1). Spirals contain plenty of cold gas, which forms stars, whereas the gas in ellipticals is too hot to form stars. Thus, ellipticals lack the young blue stars that are usually seen in spirals, and are g ...
Document
... GLAST will detect ~3000 AGNs, reaching to z~4-5. Thus we will detect cosmological evolution of AGNs and their role in the galaxy formation. Extragalactic IR-UV background light (EBL) by star-forming activity absorbs high energy gammarays by > e+e-. Thus GLAST will measure history of star-formatio ...
... GLAST will detect ~3000 AGNs, reaching to z~4-5. Thus we will detect cosmological evolution of AGNs and their role in the galaxy formation. Extragalactic IR-UV background light (EBL) by star-forming activity absorbs high energy gammarays by > e+e-. Thus GLAST will measure history of star-formatio ...
Galaxy Zoo
![](https://commons.wikimedia.org/wiki/Special:FilePath/Galaxyzoo.jpg?width=300)
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.