The environment of high-redshift AGN OLIMPIA JUDIT FOGASY
... In order to understand the formation and evolution of local massive galaxies and to reveal the processes that engineered the tight correlations found between their supermassive black hole (SMBH) mass and bulge mass or velocity dispersion, the study of powerful, high-redshift active galactic nuclei ( ...
... In order to understand the formation and evolution of local massive galaxies and to reveal the processes that engineered the tight correlations found between their supermassive black hole (SMBH) mass and bulge mass or velocity dispersion, the study of powerful, high-redshift active galactic nuclei ( ...
Galaxies
... Figure 9.7 shows the magnitude–radius relation for dwarf galaxies at a variety of distances. Nearby dwarf galaxies within a few Mpc and distant faint galaxies are well-separated in this space; their low photometric redshifts will further help to distinguish them. An important question will be the ex ...
... Figure 9.7 shows the magnitude–radius relation for dwarf galaxies at a variety of distances. Nearby dwarf galaxies within a few Mpc and distant faint galaxies are well-separated in this space; their low photometric redshifts will further help to distinguish them. An important question will be the ex ...
148 Jun - British Astronomical Association
... system with the stars separated though still quite close. It appears that the orbit of the eclipsing stars is ellipitical as the secondary minimum does not occur at 0.5 of the system’s phase. RX Herculis is roughly midway between Rasalhague and Altair. AK Herculis Although this system is not on our ...
... system with the stars separated though still quite close. It appears that the orbit of the eclipsing stars is ellipitical as the secondary minimum does not occur at 0.5 of the system’s phase. RX Herculis is roughly midway between Rasalhague and Altair. AK Herculis Although this system is not on our ...
The Astrology of Space - Matrix Astrology Software
... All rights reserved. No part of the publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the publisher. Graphics designed by Michael Erlewine Some graph ...
... All rights reserved. No part of the publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the publisher. Graphics designed by Michael Erlewine Some graph ...
Spectroscopic Atlas for Amateur Astronomers
... MK Spectral Atlas for Stars Earlier Than the Sun” from 1978 by Morgan, Abt, and Tapscott ...
... MK Spectral Atlas for Stars Earlier Than the Sun” from 1978 by Morgan, Abt, and Tapscott ...
LACEwING: A New Moving Group Analysis Code
... We present a new nearby young moving group (NYMG) kinematic membership analysis code, LocAting Constituent mEmbers In Nearby Groups (LACEwING), a new Catalog of Suspected Nearby Young Stars, a new list of bona fide members of moving groups, and a kinematic traceback code. LACEwING is a convergence-st ...
... We present a new nearby young moving group (NYMG) kinematic membership analysis code, LocAting Constituent mEmbers In Nearby Groups (LACEwING), a new Catalog of Suspected Nearby Young Stars, a new list of bona fide members of moving groups, and a kinematic traceback code. LACEwING is a convergence-st ...
- Isaac Newton Group of Telescopes
... the presence of prominent bands of titanium oxide and, especially, vanadium oxide at 750 nm allowed to derive its spectral classification and an estimate of its effective surface temperature, which turned out to be some 2350 K. The spectrum allowed to infere a velocity measurement of this object in ...
... the presence of prominent bands of titanium oxide and, especially, vanadium oxide at 750 nm allowed to derive its spectral classification and an estimate of its effective surface temperature, which turned out to be some 2350 K. The spectrum allowed to infere a velocity measurement of this object in ...
Stars, Galaxies, and Beyond
... I have prepared this summary to assist in learning some of the materials relevant to the courses named. These 300–level (junior) college courses have provided a satisfying opportunity to take a more detailed but still manageable look at astronomy and astrophysics applying to space well beyond the so ...
... I have prepared this summary to assist in learning some of the materials relevant to the courses named. These 300–level (junior) college courses have provided a satisfying opportunity to take a more detailed but still manageable look at astronomy and astrophysics applying to space well beyond the so ...
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry
... low mass versions of elliptical galaxies (e.g., Lin & Faber 1983; Kormendy 1985; Ichikawa, Wakamatsu, & Okamura 1986; Caldwell & Bothun 1987; Binggeli & Cameron 1991). Unlike their giant counterparts, gas-poor dwarf elliptical galaxies and gas-rich dwarf irregular galaxies have similar stellar distr ...
... low mass versions of elliptical galaxies (e.g., Lin & Faber 1983; Kormendy 1985; Ichikawa, Wakamatsu, & Okamura 1986; Caldwell & Bothun 1987; Binggeli & Cameron 1991). Unlike their giant counterparts, gas-poor dwarf elliptical galaxies and gas-rich dwarf irregular galaxies have similar stellar distr ...
constellations - Richmond and Glen Allen Weather
... What is a constellation? Constellation is derived from the Latin "constellatus," set with stars; from "com-," together, and "stellare," to shine; stella, a star. A constellation is a group of stars, which might form a pattern or shape within a specific area of the sky and is often named after people ...
... What is a constellation? Constellation is derived from the Latin "constellatus," set with stars; from "com-," together, and "stellare," to shine; stella, a star. A constellation is a group of stars, which might form a pattern or shape within a specific area of the sky and is often named after people ...
Ages of Young Stars
... Table 1: LDB ages compared with ages determined from upper main sequence fitting using models both with and without convective overshoot. Columns 2-4 list the apparent I magnitude of the LDB, the published LDB age and the source paper. Columns 5 and 6 give a bolometric magnitude and LDB age that hav ...
... Table 1: LDB ages compared with ages determined from upper main sequence fitting using models both with and without convective overshoot. Columns 2-4 list the apparent I magnitude of the LDB, the published LDB age and the source paper. Columns 5 and 6 give a bolometric magnitude and LDB age that hav ...
Ages of young stars
... individual objects. A reliable age scale is established above 20 Myr from measurement of the Lithium Depletion Boundary (LDB) in young clusters, and consistency is shown between these ages and those from the upper main sequence and the main sequence turn-off – if modest core convection and rotation ...
... individual objects. A reliable age scale is established above 20 Myr from measurement of the Lithium Depletion Boundary (LDB) in young clusters, and consistency is shown between these ages and those from the upper main sequence and the main sequence turn-off – if modest core convection and rotation ...
– 1 – 1. Galaxy Observations 1.1.
... The impact of the SDSS in this field has been profound. The combination of huge samples observed and processed in a uniform manner, an easily searchable database with intermittant public releases of hundreds of thousands of spectra, and precision 5 color photometry, has been revolutionary. The SDSS ...
... The impact of the SDSS in this field has been profound. The combination of huge samples observed and processed in a uniform manner, an easily searchable database with intermittant public releases of hundreds of thousands of spectra, and precision 5 color photometry, has been revolutionary. The SDSS ...
Astronomers` Observing Guides
... significance in the cosmic scheme of things, and the valuable insights they provide into such fundamental matters as stellar masses and the ultimate fate of stars. The more we know about these fascinating objects, the more enjoyment we will ultimately derive from actually viewing them firsthand with b ...
... significance in the cosmic scheme of things, and the valuable insights they provide into such fundamental matters as stellar masses and the ultimate fate of stars. The more we know about these fascinating objects, the more enjoyment we will ultimately derive from actually viewing them firsthand with b ...
Stellarium User Guide
... perfect way of arranging a display of a sequence of astronomical events from the earliest versions of Stellarium and a simple system called the Stratoscript was implemented. The scipting facility is Stellarium’s version of a “Presentation”, a feature that may be used to run an astronomical or other ...
... perfect way of arranging a display of a sequence of astronomical events from the earliest versions of Stellarium and a simple system called the Stratoscript was implemented. The scipting facility is Stellarium’s version of a “Presentation”, a feature that may be used to run an astronomical or other ...
Chapter 5 The Evolutionary Paths Of Nearby Galaxies
... hydrogen content. Unlike the AGN-hosts, which occupy the transition region only for masses M∗ & 1010 M⊙ , the Hi deficient galaxies tend to lie at the red edge of the blue sequence and in the transition region, independent of the stellar mass. More importantly, at fixed stellar mass, Hi deficient sy ...
... hydrogen content. Unlike the AGN-hosts, which occupy the transition region only for masses M∗ & 1010 M⊙ , the Hi deficient galaxies tend to lie at the red edge of the blue sequence and in the transition region, independent of the stellar mass. More importantly, at fixed stellar mass, Hi deficient sy ...
A new view of galaxy evolution
... in a galaxy ourselves. When galaxies were first recognized as distinct objects they were used as cosmological probes, either through their brightness or from the brightness of stars within them. It was only later that the study of galaxy evolution began, by trying to answer the questions of how gala ...
... in a galaxy ourselves. When galaxies were first recognized as distinct objects they were used as cosmological probes, either through their brightness or from the brightness of stars within them. It was only later that the study of galaxy evolution began, by trying to answer the questions of how gala ...
Elliptical Galaxies
... have a short axis about 65% of the length of the long axis with a dispersion of about 15%. This picture remained current until the late 1970s but has been dramatically revised since then. In recent years attempts to produce a physical classification for ellipticals, and new ways of estimating their ...
... have a short axis about 65% of the length of the long axis with a dispersion of about 15%. This picture remained current until the late 1970s but has been dramatically revised since then. In recent years attempts to produce a physical classification for ellipticals, and new ways of estimating their ...
Article PDF - IOPscience
... A major problem in extragalactic astronomy is the inability to distinguish in a robust, physical, and modelindependent way how galaxy populations are physically related to each other and to their formation histories. A similar, but distinct, and also long-standing question is whether the structural ...
... A major problem in extragalactic astronomy is the inability to distinguish in a robust, physical, and modelindependent way how galaxy populations are physically related to each other and to their formation histories. A similar, but distinct, and also long-standing question is whether the structural ...
Chapter 24
... than possessing a dense central nucleus, they often exhibit little internal structure of any kind. As with spirals, the stellar density increases sharply in the central nucleus. Denoted by the letter E, these systems are subdivided according to how elliptical they appear on the sky. The most circula ...
... than possessing a dense central nucleus, they often exhibit little internal structure of any kind. As with spirals, the stellar density increases sharply in the central nucleus. Denoted by the letter E, these systems are subdivided according to how elliptical they appear on the sky. The most circula ...
Digital Universe Guide - American Museum of Natural History
... Shift your view without moving from your current position, equivalent to looking around by moving your head but not your feet. With eyes forward (looking at the center of the display), moving toward or away (backward) along your line of sight. Orbit about the Point of Interest. If the Point of Inter ...
... Shift your view without moving from your current position, equivalent to looking around by moving your head but not your feet. With eyes forward (looking at the center of the display), moving toward or away (backward) along your line of sight. Orbit about the Point of Interest. If the Point of Inter ...
Introduction
... galaxies. In fact, galaxies with quenched star formation are typically gas deficient systems residing in the cluster environment, suggesting that environmental effects are responsible for removing the gas required to fuel star formation in these objects. A fraction of quenched late-type galaxies are ...
... galaxies. In fact, galaxies with quenched star formation are typically gas deficient systems residing in the cluster environment, suggesting that environmental effects are responsible for removing the gas required to fuel star formation in these objects. A fraction of quenched late-type galaxies are ...
Confirmation of Hostless Type Ia Supernovae Using Hubble Space
... above results are based on αd = −1.0, which is true for field galaxies (Blanton et al. 2003), but αd may be higher in rich galaxy clusters (e.g., Milne et al. 2007). Adopting αd = −1.5 as an upper limit, the MENeaCS survey estimated that . 2% of the stellar mass in dwarf cluster galaxies below dete ...
... above results are based on αd = −1.0, which is true for field galaxies (Blanton et al. 2003), but αd may be higher in rich galaxy clusters (e.g., Milne et al. 2007). Adopting αd = −1.5 as an upper limit, the MENeaCS survey estimated that . 2% of the stellar mass in dwarf cluster galaxies below dete ...
THE HELIACAL RISE OF SIRIUS- Algorithm
... more humid and cloudy. As a result the morning-first risings of the stars in 2005 were blurred and not so exiting and easily detected. In 2003 I spot-saw Sirius on the 18th of August with 7.3° AV. On the same date in 2005 Sirius had an AV of 7.8° but I was able to see it only with binoculars! Althou ...
... more humid and cloudy. As a result the morning-first risings of the stars in 2005 were blurred and not so exiting and easily detected. In 2003 I spot-saw Sirius on the 18th of August with 7.3° AV. On the same date in 2005 Sirius had an AV of 7.8° but I was able to see it only with binoculars! Althou ...
Aries (constellation)
Aries is one of the constellations of the zodiac. It is located in the northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram, and its symbol is 20px (Unicode ♈), representing a ram's horns. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation, ranking 39th overall size, with an area of 441 square degrees (1.1% of the celestial sphere).Although Aries came to represent specifically the ram whose fleece became the Golden Fleece of Ancient Greek mythology, it has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.