Ultra-high-redshift galaxies from
... (the spectra or SED) can be modelled as a combination of many massive young stars with a low dust and metal content. The young stars are hot and blue, and so the spectrum peaks in the rest-frame hard UV. However because of the neutral hydrogen throughout the universe at this time, much of the high e ...
... (the spectra or SED) can be modelled as a combination of many massive young stars with a low dust and metal content. The young stars are hot and blue, and so the spectrum peaks in the rest-frame hard UV. However because of the neutral hydrogen throughout the universe at this time, much of the high e ...
Galaxies - science1d
... •Our Sun takes about 220 million years to travel once around the centre of the galaxy •This means that in millions of years, people will see different stars at night •If our solar system was a single bean, the Milky Way would be a bit larger than the area of Lake Superior ...
... •Our Sun takes about 220 million years to travel once around the centre of the galaxy •This means that in millions of years, people will see different stars at night •If our solar system was a single bean, the Milky Way would be a bit larger than the area of Lake Superior ...
or galaxy
... Irregular Galaxies • Irregular Galaxy: not disk-like or ellipsoidal and have no nucleus; chaotic, irregular appearance • They have little symmetry in their shape • Most irregular galaxies were once spiral or elliptical galaxies that have been distorted and deformed by gravitational action from othe ...
... Irregular Galaxies • Irregular Galaxy: not disk-like or ellipsoidal and have no nucleus; chaotic, irregular appearance • They have little symmetry in their shape • Most irregular galaxies were once spiral or elliptical galaxies that have been distorted and deformed by gravitational action from othe ...
Document
... The region of the Galaxy within 32.6 lightyears of the sun Here stars move generally with the sun in its orbit around the center of the galaxy ...
... The region of the Galaxy within 32.6 lightyears of the sun Here stars move generally with the sun in its orbit around the center of the galaxy ...
슬라이드 1
... Fig. (1) – The bar fraction is higher in redder, brighter galaxies. When color is fixed, it seems barred galaxies have higher star formation activity relative to non-barred galaxies. And the bar fraction also depend on central velocity dispersion (σ ). Fig. (2) – All contours are nearly parallel to ...
... Fig. (1) – The bar fraction is higher in redder, brighter galaxies. When color is fixed, it seems barred galaxies have higher star formation activity relative to non-barred galaxies. And the bar fraction also depend on central velocity dispersion (σ ). Fig. (2) – All contours are nearly parallel to ...
Slide 1
... Baryons radiate energy and fall toward the halo center Less than 20% form stars and become galaxies If the baryonic AM distribution was like that of DM baryons would have: ...
... Baryons radiate energy and fall toward the halo center Less than 20% form stars and become galaxies If the baryonic AM distribution was like that of DM baryons would have: ...
V: 0
... 8.8(C) explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe ...
... 8.8(C) explore how different wavelengths of the electromagnetic spectrum such as light and radio waves are used to gain information about distances and properties of components in the universe ...
dekel.eng
... dark matter can be clearly detected indirectly by observing its tremendous gravitational effects on visible objects. This common understanding faced a severe challenge when a team of astronomers, writing in Science in 2003, reported a surprising absence of dark matter in one type of galaxy – “ellipt ...
... dark matter can be clearly detected indirectly by observing its tremendous gravitational effects on visible objects. This common understanding faced a severe challenge when a team of astronomers, writing in Science in 2003, reported a surprising absence of dark matter in one type of galaxy – “ellipt ...
Dust and Stellar Emission of Nearby Galaxies in the KINGFISH
... empirically study the emission from stars and dust in these galaxies. We use the spectral energy distributions computed by Dale et al., using data from GALEX, SDSS (and other optical measurements), 2MASS, Spitzer, SCUBA (when available), as well as some new data from Herschel. We estimate the stella ...
... empirically study the emission from stars and dust in these galaxies. We use the spectral energy distributions computed by Dale et al., using data from GALEX, SDSS (and other optical measurements), 2MASS, Spitzer, SCUBA (when available), as well as some new data from Herschel. We estimate the stella ...
galaxies
... 5. (2 pts.) Why can’t galaxies evolve from elliptical to spiral? Why can’t they evolve from spiral to elliptical? ...
... 5. (2 pts.) Why can’t galaxies evolve from elliptical to spiral? Why can’t they evolve from spiral to elliptical? ...
Mean Cut for formation
... of 46,748 luminous red galaxies from the Sloan Digital Sky Survey. The survey region covers 0.72 h-3 Gpc3 over 3816 deg2 and 0.16
... of 46,748 luminous red galaxies from the Sloan Digital Sky Survey. The survey region covers 0.72 h-3 Gpc3 over 3816 deg2 and 0.16
www.univ-amu.fr www.lam.fr PhD Thesis PhD thesis director name
... several minutes, the radiation emitted in this interval is equivalent to that of the Sun over its entire life. They are hundreds of times brighter than a typical supernova, the ultimate end of a massive star. Due to the extreme luminosity of their multi-wavelength emissions, they are now considered ...
... several minutes, the radiation emitted in this interval is equivalent to that of the Sun over its entire life. They are hundreds of times brighter than a typical supernova, the ultimate end of a massive star. Due to the extreme luminosity of their multi-wavelength emissions, they are now considered ...
PPT - ESO
... The ability of galaxies to continue forming stars is well known to strongly depend on their local environment While isolated field galaxies are mostly star-forming, almost all galaxies in the cores of rich clusters are now passively-evolving ...
... The ability of galaxies to continue forming stars is well known to strongly depend on their local environment While isolated field galaxies are mostly star-forming, almost all galaxies in the cores of rich clusters are now passively-evolving ...
Elliptical Galaxies
... • No current star formation • About the same number of stars in a globular cluster • Tend to be found near larger galaxies • The most common type of galaxy ...
... • No current star formation • About the same number of stars in a globular cluster • Tend to be found near larger galaxies • The most common type of galaxy ...
The Transient Radio Sky Astrophysical and Artificial
... •30% of luminous QSOs (M_B < -27) have L_FIR = 1e13 L_sun (independent of redshift) •Z= 2 sample: All L_FIR luminous QSOs detected at 1.4 GHz, and in all cases ‘q’ consistent with star forming galaxy (2.3 +/- 0.3) ...
... •30% of luminous QSOs (M_B < -27) have L_FIR = 1e13 L_sun (independent of redshift) •Z= 2 sample: All L_FIR luminous QSOs detected at 1.4 GHz, and in all cases ‘q’ consistent with star forming galaxy (2.3 +/- 0.3) ...
Welcome to the Milky Way Galaxy: Student Notes
... • According to astronomers, their best estimate predicts there are at least ______ _____________ galaxies in the ___________________ universe. ...
... • According to astronomers, their best estimate predicts there are at least ______ _____________ galaxies in the ___________________ universe. ...
Organizing the cosmos
... It is visible as a faint smudge on a moonless night, it is one of the farthest objects visible to the naked eye, and can be seen even from urban areas with binoculars 2.3 million ly away ...
... It is visible as a faint smudge on a moonless night, it is one of the farthest objects visible to the naked eye, and can be seen even from urban areas with binoculars 2.3 million ly away ...
Galaxies Presentation
... regions – Loose, lumpy spiral arms (two or more) are made of bright blue young stars in the cstar and yellow stars throughout the disc, and dust. Most arms start close to the center of the galaxy; so it has a small central bulge. It is referred to as a pinwheel shape. – Made mainly of young stars ...
... regions – Loose, lumpy spiral arms (two or more) are made of bright blue young stars in the cstar and yellow stars throughout the disc, and dust. Most arms start close to the center of the galaxy; so it has a small central bulge. It is referred to as a pinwheel shape. – Made mainly of young stars ...
EXERCISES: Set 1 of 4 Q1: Suppose the universe consisted of a
... Q3(c): Consider two galaxies, A and B. As viewed from Earth, galaxy A is at redshift zA = 1 and galaxy B is at zB = 9. What is the redshift of galaxy B as measured by a hypothetical observer on galaxy A? Q3(d): When observing a distant galaxy, we measure a combination of kinematic and cosmological r ...
... Q3(c): Consider two galaxies, A and B. As viewed from Earth, galaxy A is at redshift zA = 1 and galaxy B is at zB = 9. What is the redshift of galaxy B as measured by a hypothetical observer on galaxy A? Q3(d): When observing a distant galaxy, we measure a combination of kinematic and cosmological r ...
In Far Off Distant Galaxies: Classification by Shape
... Of any of the elliptical galaxies seen in objects 1 through 10 above, rank them from most elliptical in shape to least elliptical. MOST ...
... Of any of the elliptical galaxies seen in objects 1 through 10 above, rank them from most elliptical in shape to least elliptical. MOST ...
Study Guide
... 2. The light spreads out to make a range of different colors with different wavelengths called a_____________________. 3. The ____________________________ _______________________includes the entire range of radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays ...
... 2. The light spreads out to make a range of different colors with different wavelengths called a_____________________. 3. The ____________________________ _______________________includes the entire range of radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays ...
Powerpoint
... arms, with Types Sb and Sc progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in our own Galaxy: disk, core, halo, bulge, spiral arms. ...
... arms, with Types Sb and Sc progressively less tight, although the correlation is not perfect. The components of spiral galaxies are the same as in our own Galaxy: disk, core, halo, bulge, spiral arms. ...
Stellar Models
... Model for Seyfert Galaxies Seyfert I: Strong, broad emission lines from rapidly moving gas clouds near the BH Gas clouds ...
... Model for Seyfert Galaxies Seyfert I: Strong, broad emission lines from rapidly moving gas clouds near the BH Gas clouds ...
Seyfert galaxy
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material.Seen in visible light, most Seyfert galaxies look like normal spiral galaxies, but when studied under other wavelengths, it becomes clear that the luminosity of their cores is of comparable intensity to the luminosity of whole galaxies the size of the Milky Way.Seyfert galaxies are named after Carl Seyfert, who first described this class in 1943.