normal and active - FirstLight Astro
... ✴ simply now: if we can find how fast something is moving away from us, we can find its distance ✴ but we can’t know it too well; the exact Hubble const is still slightly elusive ...
... ✴ simply now: if we can find how fast something is moving away from us, we can find its distance ✴ but we can’t know it too well; the exact Hubble const is still slightly elusive ...
PDF
... morphology by exploiting deep HST images spanning a substantial range in look-back time. Prior to HST, attempts had been made from the best ground-based observatories to resolve and classify distant galaxies but, even in the best conditions, galaxies as close as redshifts of 0.3–0.5 (corresponding t ...
... morphology by exploiting deep HST images spanning a substantial range in look-back time. Prior to HST, attempts had been made from the best ground-based observatories to resolve and classify distant galaxies but, even in the best conditions, galaxies as close as redshifts of 0.3–0.5 (corresponding t ...
The Milky Way`s Collision with the Andromeda Galaxy
... The researchers combined the results from different observed fields within M31. They then used a computer program that models how stars move inside the Andromeda galaxy and how they will appear to shift due to the Sun’s own motion in the Milky Way. The model also included information on how other ga ...
... The researchers combined the results from different observed fields within M31. They then used a computer program that models how stars move inside the Andromeda galaxy and how they will appear to shift due to the Sun’s own motion in the Milky Way. The model also included information on how other ga ...
Comments
... and feedback processes, all functions of the dark-matter halo mass associated with a similar scale. In haloes below a critical shock-heating mass Ms~6x10^11 Msol, discs are built by cold streams, not heated by a virial shock, yielding efficient early star formation (SFR). It is regulated by supernov ...
... and feedback processes, all functions of the dark-matter halo mass associated with a similar scale. In haloes below a critical shock-heating mass Ms~6x10^11 Msol, discs are built by cold streams, not heated by a virial shock, yielding efficient early star formation (SFR). It is regulated by supernov ...
1 Introduction - Wiley-VCH
... characterized by very smooth and regular morphologies. Galaxies can host an active galactic nucleus (AGN) , where the energy necessary to sustain the powerful electromagnetic radiation is supplied by the accretion of mass onto the central supermassive black hole. Active galaxies can be divided into ...
... characterized by very smooth and regular morphologies. Galaxies can host an active galactic nucleus (AGN) , where the energy necessary to sustain the powerful electromagnetic radiation is supplied by the accretion of mass onto the central supermassive black hole. Active galaxies can be divided into ...
2 Galaxy morphology and classification
... little or no net angular momentum. It is thought to have formed, at least in part, by the accretion of small satellite galaxies. The dark halo is the dark matter component that envelopes all galaxies. It extends well beyond the visible extents of the galaxy. The ,mass density decreases with radius r ...
... little or no net angular momentum. It is thought to have formed, at least in part, by the accretion of small satellite galaxies. The dark halo is the dark matter component that envelopes all galaxies. It extends well beyond the visible extents of the galaxy. The ,mass density decreases with radius r ...
PH607lec12-5gal3
... Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
... Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
Velocity Field in the Local Volume
... away from homogeneity. The galaxies concentrate to the Supergalactic plane and form the groups and filaments which are easy to see on Figures 1 and 2. In our neighborhood there are three most prominent groups of galaxies. It is Local Group, Cen A and M81 groups. Despite of the fact that the galaxies ...
... away from homogeneity. The galaxies concentrate to the Supergalactic plane and form the groups and filaments which are easy to see on Figures 1 and 2. In our neighborhood there are three most prominent groups of galaxies. It is Local Group, Cen A and M81 groups. Despite of the fact that the galaxies ...
PH607lec11-4gal2
... Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
... Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
POISE AND EVOLUTION OF THE GALAXY : STRUCTURE ,
... And indeed, humanity has not registered more than about ten quite certified SUPERNOVAE, on the whole, within the last 2000 years. The reason is clear : this is just an instant phenomenon, with absolutely no warning before, and as soon disappearing with only quite ephemeral fossil remnants testifyin ...
... And indeed, humanity has not registered more than about ten quite certified SUPERNOVAE, on the whole, within the last 2000 years. The reason is clear : this is just an instant phenomenon, with absolutely no warning before, and as soon disappearing with only quite ephemeral fossil remnants testifyin ...
Galaxy Hunters Article, Cosmology Information, First Star Facts
... that the Milky Way was not alone. In the predawn hours of October 6,1923, at the Mount Wilson Observatory in California, he photographed a fuzzy, spiral-shaped clump of stars known as M3 1, or Andromeda, which most astronomers assumed was part of the Milky Way. He soon realized that within the clump ...
... that the Milky Way was not alone. In the predawn hours of October 6,1923, at the Mount Wilson Observatory in California, he photographed a fuzzy, spiral-shaped clump of stars known as M3 1, or Andromeda, which most astronomers assumed was part of the Milky Way. He soon realized that within the clump ...
Understanding the Astrophysics of Galaxy Evolution: the role of
... correlated with dark matter halo mass and so the best link to the underlying cosmological model. A survey must be large (∼ few ×105 galaxies) in order to disentangle covariances in the physical properties of galaxies. One reason it is so difficult to understand how galaxies form is because almost al ...
... correlated with dark matter halo mass and so the best link to the underlying cosmological model. A survey must be large (∼ few ×105 galaxies) in order to disentangle covariances in the physical properties of galaxies. One reason it is so difficult to understand how galaxies form is because almost al ...
The role of black holes in galaxy formation and evolution
... the high-speed winds in broad absorption line quasars33. Jets can produce ‗energy-driven‘ winds via shock heating and ‗momentum-driven‘ winds via ram pressure. All these processes contain large inefficiencies, which are difficult to quantify: metals that retain some electrons even at high temperatur ...
... the high-speed winds in broad absorption line quasars33. Jets can produce ‗energy-driven‘ winds via shock heating and ‗momentum-driven‘ winds via ram pressure. All these processes contain large inefficiencies, which are difficult to quantify: metals that retain some electrons even at high temperatur ...
Studying the Universe Studying the Universe
... The simplest optical telescope has two lenses. One lens, called the objective lens, collects light and forms an image at the back of the telescope. The bigger the objective lens, the more light the telescope can gather. The second lens is located in the eyepiece of the telescope. This lens magnifies ...
... The simplest optical telescope has two lenses. One lens, called the objective lens, collects light and forms an image at the back of the telescope. The bigger the objective lens, the more light the telescope can gather. The second lens is located in the eyepiece of the telescope. This lens magnifies ...
Coma Cluster of Galaxies Activity
... Galaxies are found throughout the universe, from our next door neighbors — the Magellanic Clouds and Andromeda — all the way out to the edge of the visible universe 13 billion light years away. Nobody knows for sure, but it is estimated that there are 100 billion galaxies or more in the visible univ ...
... Galaxies are found throughout the universe, from our next door neighbors — the Magellanic Clouds and Andromeda — all the way out to the edge of the visible universe 13 billion light years away. Nobody knows for sure, but it is estimated that there are 100 billion galaxies or more in the visible univ ...
Sample
... center of the Milky Way galaxy harbors a supermassive black hole. A black hole actually is a hole in the observable universe, a region of space where gravity has become so strong that nothing, not even light, can ever escape. The tremendous gravitational pull of a black hole originates from its imme ...
... center of the Milky Way galaxy harbors a supermassive black hole. A black hole actually is a hole in the observable universe, a region of space where gravity has become so strong that nothing, not even light, can ever escape. The tremendous gravitational pull of a black hole originates from its imme ...
No Slide Title
... radio surveys but their visible image looked faint and star like and were called Quasi Stellar Radio Sources or Quasars for short. ...
... radio surveys but their visible image looked faint and star like and were called Quasi Stellar Radio Sources or Quasars for short. ...
Quiz 2 Lecture 12
... c. it contains mostly elliptical galaxies. d. it contains billions of galaxies. answer: c ...
... c. it contains mostly elliptical galaxies. d. it contains billions of galaxies. answer: c ...
galaxy
... • Stars are huge balls of hot, glowing gases that produce their own heat and light. • The sun is the closest star to Earth. • The sun looks larger than other stars only because it is so close to Earth. ...
... • Stars are huge balls of hot, glowing gases that produce their own heat and light. • The sun is the closest star to Earth. • The sun looks larger than other stars only because it is so close to Earth. ...
Document
... the red sequence, and no growth for the massive systems. Brown et al. 2006 astro-ph 0609584 -- NOAO and Spitzer IRAC survey: “…the stellar mass contained within the red galaxy population has roughly doubled over the past 8Gyr. This is consistent with starforming galaxies being transformed into
... the red sequence, and no growth for the massive systems. Brown et al. 2006 astro-ph 0609584 -- NOAO and Spitzer IRAC survey: “…the stellar mass contained within the red galaxy population has roughly doubled over the past 8Gyr. This is consistent with starforming galaxies being transformed into
Driving downsizing with galaxy groups
... • How quickly do galaxies lose their gas? • Consider analytic and numerical (GADGET2) models of “hot” gas+DM haloes merging with groups or clusters, on cosmologically ...
... • How quickly do galaxies lose their gas? • Consider analytic and numerical (GADGET2) models of “hot” gas+DM haloes merging with groups or clusters, on cosmologically ...
Galaxies - University of Iowa Astrophysics
... 3. flat rotation curve at large radii 4. dusty regions in the plane ...
... 3. flat rotation curve at large radii 4. dusty regions in the plane ...
Perseus ... Nuclear Emission and Outbursts from SMBHs in Normal Galaxies
... Summary - Emission and Outbursts from SMBHs in Normal Early type Galaxies Kinetic energy from outbursts in galaxies 1055-1058 ergs ( ~ 5 1042 erg s-1) 30% of gas rich galaxies have had recent (< few 107 years) outbursts Most gas-rich galaxies have nuclear X-ray (70% of galaxies) and nuclear radio e ...
... Summary - Emission and Outbursts from SMBHs in Normal Early type Galaxies Kinetic energy from outbursts in galaxies 1055-1058 ergs ( ~ 5 1042 erg s-1) 30% of gas rich galaxies have had recent (< few 107 years) outbursts Most gas-rich galaxies have nuclear X-ray (70% of galaxies) and nuclear radio e ...
Quasar
Quasars (/ˈkweɪzɑr/) or quasi-stellar radio sources are the most energetic and distant members of a class of objects called active galactic nuclei (AGN). Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that appeared to be similar to stars, rather than extended sources similar to galaxies. Their spectra contain very broad emission lines, unlike any known from stars, hence the name ""quasi-stellar."" Their luminosity can be 100 times greater than that of the Milky Way. Most quasars were formed approximately 12 billion years ago caused by collisions of galaxies and their central black holes merging to form either a supermassive black hole or a Binary black hole system.Although the true nature of these objects was controversial until the early 1980s, there is now a scientific consensus that a quasar is a compact region in the center of a massive galaxy surrounding a central supermassive black hole. Its size is 10–10,000 times the Schwarzschild radius of the black hole. The energy emitted by a quasar derives from mass falling onto the accretion disc around the black hole.