PPT
... The Dark-Matter Problem: The luminous mass of a cluster of galaxies is not large enough to account for the observed motions of the galaxies; a large amount of unobserved mass must also be present. This situation is called the dark-matter problem. Gravitational lensing of remote galaxies by a foregro ...
... The Dark-Matter Problem: The luminous mass of a cluster of galaxies is not large enough to account for the observed motions of the galaxies; a large amount of unobserved mass must also be present. This situation is called the dark-matter problem. Gravitational lensing of remote galaxies by a foregro ...
Distribution and Properties of the ISM
... – velocities of a few hundred km s-1 (proper motion, radial velocities of knots) – carry as much as 40% of accreted mass – cold, overdense material ...
... – velocities of a few hundred km s-1 (proper motion, radial velocities of knots) – carry as much as 40% of accreted mass – cold, overdense material ...
How do the most massive galaxies constrain theories of
... visible for ~250 Myr every luminous E has had ~0.5-1 dry merger since z~1 in good agreement with expectations from hierarchical models ...
... visible for ~250 Myr every luminous E has had ~0.5-1 dry merger since z~1 in good agreement with expectations from hierarchical models ...
Chapter 16
... dust content and some are more “active” than others • Galaxies tend to cluster together and these clusters appear to be separating from each other, caught up in a Universe that is expanding • The why for all this diversity is as yet unanswered ...
... dust content and some are more “active” than others • Galaxies tend to cluster together and these clusters appear to be separating from each other, caught up in a Universe that is expanding • The why for all this diversity is as yet unanswered ...
CONSTELLATION TUCANA, THE TOUCAN
... Globular Cluster 47 Tucana is the second-brightest globular cluster in the sky after Omega Centauri, 47 Tucanae (NGC 104) lies just west of the Small Magellanic Cloud. Only 14,700 light-years distant from Earth, it is thought to be around 12 billion years old. Mostly composed of old, yellow stars, i ...
... Globular Cluster 47 Tucana is the second-brightest globular cluster in the sky after Omega Centauri, 47 Tucanae (NGC 104) lies just west of the Small Magellanic Cloud. Only 14,700 light-years distant from Earth, it is thought to be around 12 billion years old. Mostly composed of old, yellow stars, i ...
Chapter 31 - The Galaxy & Universe
... 1. The outcome of the Universe depends on the amount (density) of material in it. a) Less than critical density (10-26 kg/m3) results in open Universe. ...
... 1. The outcome of the Universe depends on the amount (density) of material in it. a) Less than critical density (10-26 kg/m3) results in open Universe. ...
Study of the X-ray Source Population and the Dark Matter
... spatial and time resolution, the Wide Field Imager of the Athena Xray Observatory will make it possible to study X-ray sources down to very low flux limits. In Draco dSph, e.g., we will be able to observe X-ray sources with luminosities down to 1031 erg/s with 1000 to 2000 counts in 10 ksec, allowin ...
... spatial and time resolution, the Wide Field Imager of the Athena Xray Observatory will make it possible to study X-ray sources down to very low flux limits. In Draco dSph, e.g., we will be able to observe X-ray sources with luminosities down to 1031 erg/s with 1000 to 2000 counts in 10 ksec, allowin ...
Part II: Ideas in Conflict.
... luminous its redshift indicates it is 4 billion light years away!! ...
... luminous its redshift indicates it is 4 billion light years away!! ...
Test 3, February 7, 2007 - Brock physics
... 42. In order to detect a black hole one looks for (a) a spot into which stars and their planets fall. (b) a binary system where a companion star is not visible but has a mass greater than 3 solar masses and is an intense X-ray source. (c) intense source of visible light. (d) the accompanying white h ...
... 42. In order to detect a black hole one looks for (a) a spot into which stars and their planets fall. (b) a binary system where a companion star is not visible but has a mass greater than 3 solar masses and is an intense X-ray source. (c) intense source of visible light. (d) the accompanying white h ...
Introduction
... to stars. These stars return much of their mass, often enriched in “metals” – elements heavier than H and He – to the interstellar medium (ISM). Stellar evolution also yields remnants which add to the dark matter content, and both stars and gas may be accreted by black holes. Galaxies are sometimes ...
... to stars. These stars return much of their mass, often enriched in “metals” – elements heavier than H and He – to the interstellar medium (ISM). Stellar evolution also yields remnants which add to the dark matter content, and both stars and gas may be accreted by black holes. Galaxies are sometimes ...
Stars, Galaxies & Universe
... • Describe the life cycle of a star. • What are the three types of telescopes and how are they different? • Explain the H-R diagram. • How does the mass of a star affect the length of life of a star? • How do the different types of galaxies compare? • Explain the Big Bang Theory. ...
... • Describe the life cycle of a star. • What are the three types of telescopes and how are they different? • Explain the H-R diagram. • How does the mass of a star affect the length of life of a star? • How do the different types of galaxies compare? • Explain the Big Bang Theory. ...
cosmic microwave background and foregrounds
... simply think to the one from the Milky Way put at distance from us, emitting synchrotron emission in the radio, dust in the infrared Being point-like, their signal behaves similarly to ...
... simply think to the one from the Milky Way put at distance from us, emitting synchrotron emission in the radio, dust in the infrared Being point-like, their signal behaves similarly to ...
The resolved stellar populations of M32 Monachesi, Antonela
... morphology into two main groups: spirals and ellipticals (see Fig. 1). Spiral galaxies have bright and dusty spiral arms winding toward a bright bulge at their center. Our own Milky Way is an example of a typical spiral galaxy. Elliptical galaxies, on the other hand, have an ellipsoidal shape and ap ...
... morphology into two main groups: spirals and ellipticals (see Fig. 1). Spiral galaxies have bright and dusty spiral arms winding toward a bright bulge at their center. Our own Milky Way is an example of a typical spiral galaxy. Elliptical galaxies, on the other hand, have an ellipsoidal shape and ap ...
Dwarf galaxies in multistate scalar field dark matter halos
... We set the gravitational constant G to unity and the units of mass and length to Mu = 2.32 × 107 M (galactic mass units) and Ru = 1 kpc, respectively. With this choice, the resulting units of time and velocity become tu = 1 × 108 yr and v u = 10 km s−1 . Cylindrical coordinates (R; φ; z) are used. ...
... We set the gravitational constant G to unity and the units of mass and length to Mu = 2.32 × 107 M (galactic mass units) and Ru = 1 kpc, respectively. With this choice, the resulting units of time and velocity become tu = 1 × 108 yr and v u = 10 km s−1 . Cylindrical coordinates (R; φ; z) are used. ...
Sanroman_Granada2016..
... ⦿ Perform a detailed photometric analysis of the resolved and unresolved stellar population of M33 ...
... ⦿ Perform a detailed photometric analysis of the resolved and unresolved stellar population of M33 ...
Why Aren`t All Galaxies Barred?
... computed distribution of stars at later times, which are given in millions of years. These show clearly that the model galaxy develops a bar in a little over one billion years. This time is comparatively short on the astronom ical scale, and in fact a star about halfway out in the disk of the comput ...
... computed distribution of stars at later times, which are given in millions of years. These show clearly that the model galaxy develops a bar in a little over one billion years. This time is comparatively short on the astronom ical scale, and in fact a star about halfway out in the disk of the comput ...
A Tidal Disruption Event Candidate from the 2XMM Catalog
... our 2013 Chandra observation, with peak luminosity near 1044 erg/s and lying toward the center of an inactive galaxy, thus probably a tidal disruption event. From its two ultrasoft Xray observations near the peak of unprecedented quality, we gain more insights into such event ...
... our 2013 Chandra observation, with peak luminosity near 1044 erg/s and lying toward the center of an inactive galaxy, thus probably a tidal disruption event. From its two ultrasoft Xray observations near the peak of unprecedented quality, we gain more insights into such event ...
Black Holes & Quasars—18 Nov • Black hole • Quasar Ast 207 F2009
... 1 LY Using “adaptive optics” technique on Gemini 8m telescope. ...
... 1 LY Using “adaptive optics” technique on Gemini 8m telescope. ...
Hubble`s Expansion of the Universe
... of other fuzzy objects in the sky which he knew were not comets. Worried that other comet hunters might be similarly confused, he compiled a list to prevent their misidentification. Messier’s list (where objects are identified by M for Messier, followed by a number, e.g. M51) contained information o ...
... of other fuzzy objects in the sky which he knew were not comets. Worried that other comet hunters might be similarly confused, he compiled a list to prevent their misidentification. Messier’s list (where objects are identified by M for Messier, followed by a number, e.g. M51) contained information o ...
Two-Gyro Performance, Scheduling and Acquisitions
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
S1E4 Extreme Stars
... While the exterior layers expand, the helium core continues to contract, while growing in mass, and eventually becomes hot enough (100 million Kelvin) for helium to begin to fuse into carbon Carbon ash is deposited in core and eventually a helium-burning shell develops. This shell is itself surround ...
... While the exterior layers expand, the helium core continues to contract, while growing in mass, and eventually becomes hot enough (100 million Kelvin) for helium to begin to fuse into carbon Carbon ash is deposited in core and eventually a helium-burning shell develops. This shell is itself surround ...
Volcanoes and Igneous Activity Earth - Chapter 4
... Small (approximately the size of Earth) Lower-central area on the H-R diagram Not all are white in color Perhaps 10% of all stars ...
... Small (approximately the size of Earth) Lower-central area on the H-R diagram Not all are white in color Perhaps 10% of all stars ...
FEEDBACK IN THE LOCAL UNIVERSE: The
... radio source has returned upwards of 1061 erg to regions of the cluster that extend even beyond the cooling radius. Note the strong spatial anti-correlation of the radio source (in pink) with the X-ray cavities (in blue). Such correspondence is typical of cool core clusters with cavities and extende ...
... radio source has returned upwards of 1061 erg to regions of the cluster that extend even beyond the cooling radius. Note the strong spatial anti-correlation of the radio source (in pink) with the X-ray cavities (in blue). Such correspondence is typical of cool core clusters with cavities and extende ...
The chemical case for no winds in dwarf irregular galaxies
... recent observations (e.g. Dunn 2010) indicate that dEs/dSphs and dIrrs constitute two structurally distinct populations. In this work, we focus our attention on the evolution of isolated gas-rich dwarf galaxies, not affected by external environmental processes. One of the agents that may regulate th ...
... recent observations (e.g. Dunn 2010) indicate that dEs/dSphs and dIrrs constitute two structurally distinct populations. In this work, we focus our attention on the evolution of isolated gas-rich dwarf galaxies, not affected by external environmental processes. One of the agents that may regulate th ...
Nova
... In Algol-type binaries, one of the stars has evolved and expanded to fill a droplet-shaped potential surface, called the Roche lobe, within which material is gravitationally bound to the star (see Figure 1). The Roche surface is, therefore, the surface along which the gravitational potential is comm ...
... In Algol-type binaries, one of the stars has evolved and expanded to fill a droplet-shaped potential surface, called the Roche lobe, within which material is gravitationally bound to the star (see Figure 1). The Roche surface is, therefore, the surface along which the gravitational potential is comm ...