The Norma cluster (ACO3627) – II. The near-infrared Ks
... making optical observations particularly sensitive to galaxies where star formation is taking place, the NIR is much less affected by short bursts of star formation and therefore a better indicator of galaxy mass (Andreon & Pelló 2000). The NIR has the advantage of high resolution and sensitivity t ...
... making optical observations particularly sensitive to galaxies where star formation is taking place, the NIR is much less affected by short bursts of star formation and therefore a better indicator of galaxy mass (Andreon & Pelló 2000). The NIR has the advantage of high resolution and sensitivity t ...
The 2006 RBSE Journal - National Optical Astronomy Observatory
... objects listed. I decided to use the target AO 0235+164, an AGN, for my project. I used Starry Night Pro 3.1 to locate and predict where the target would be for observation. After imputing the Right Ascension (RA) and Declination (Dec), I could see where the target would be on any given date. The co ...
... objects listed. I decided to use the target AO 0235+164, an AGN, for my project. I used Starry Night Pro 3.1 to locate and predict where the target would be for observation. After imputing the Right Ascension (RA) and Declination (Dec), I could see where the target would be on any given date. The co ...
Galaxies - science9atsouthcarletonhs
... At the beginning of the 20th century, what we now call spiral galaxies were referred to as “spiral nebulae” and most astronomers believed them to be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Gre ...
... At the beginning of the 20th century, what we now call spiral galaxies were referred to as “spiral nebulae” and most astronomers believed them to be clouds of gas and stars associated with our own Milky Way. The breakthrough came in 1924 when Edwin Hubble was able to measure the distance to the “Gre ...
Planetary Nebulae: Observational Properties, Mimics, and Diagnostics
... A heterogeneous variety of contaminating emissionline objects have been a big problem in PN catalogues over the years, primarily because many new PN candidates were classified using only one or two criteria. Either the emphasis was placed on morphology (e.g. Abell 1966), or on the object having a PN ...
... A heterogeneous variety of contaminating emissionline objects have been a big problem in PN catalogues over the years, primarily because many new PN candidates were classified using only one or two criteria. Either the emphasis was placed on morphology (e.g. Abell 1966), or on the object having a PN ...
Astronomy 1 – Introductory Astronomy Spring 2014
... You can see that arcminutes are often abbreviated with a single quote (') and arcseconds with a double quote ("). They are also often abbreviated arcsec and arcmin. In this lab we will use only degrees. When you want to measure lengths or distances on the ground, you use a ruler or tape measure. Sim ...
... You can see that arcminutes are often abbreviated with a single quote (') and arcseconds with a double quote ("). They are also often abbreviated arcsec and arcmin. In this lab we will use only degrees. When you want to measure lengths or distances on the ground, you use a ruler or tape measure. Sim ...
The Be/X-ray transient V0332153: evidence for a tilt between the
... for a review). Both the emission lines and the characteristic strong infrared excess when compared to normal stars of the same spectral types are attributed to the presence of a circumstellar disc. Most Be/X-ray binaries have relatively eccentric orbits, and the neutron star companion is normally fa ...
... for a review). Both the emission lines and the characteristic strong infrared excess when compared to normal stars of the same spectral types are attributed to the presence of a circumstellar disc. Most Be/X-ray binaries have relatively eccentric orbits, and the neutron star companion is normally fa ...
Galaxies and the Universe bb
... • Around the galactic nucleus • Outermost stars move the slowest • Sun rotates around the galactic nucleus once about every 200 million years ...
... • Around the galactic nucleus • Outermost stars move the slowest • Sun rotates around the galactic nucleus once about every 200 million years ...
Chapter 1: Introduction to Galaxies File - QMplus
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
Arcturus - bYTEBoss
... Another version portrays Boötes as a grape grower called Icarius, who one day invited the Roman god Bacchus, also called Dionysus, to inspect his vineyards. Bacchus revealed the secret of wine making to Icarius, who was so impressed by this alcoholic beverage that he invited his friends round to sam ...
... Another version portrays Boötes as a grape grower called Icarius, who one day invited the Roman god Bacchus, also called Dionysus, to inspect his vineyards. Bacchus revealed the secret of wine making to Icarius, who was so impressed by this alcoholic beverage that he invited his friends round to sam ...
Altair - the hottest `cool` star in X-rays
... 2.4 MK and its emission measure distribution (EMD) is dominated by rather cool plasma at temperatures in the range of 1 – 4 MK, additionally a weak hotter component seems to contribute at a few percent level. These properties are quite typical for weakly active stars and similar to those of the quie ...
... 2.4 MK and its emission measure distribution (EMD) is dominated by rather cool plasma at temperatures in the range of 1 – 4 MK, additionally a weak hotter component seems to contribute at a few percent level. These properties are quite typical for weakly active stars and similar to those of the quie ...
Refusing to Go Quietly: GRBs and Their Progenitors
... Advanced LIGO will be able to detect gravitational waves that stretch the length of the arms by a fraction of the size of a proton ...
... Advanced LIGO will be able to detect gravitational waves that stretch the length of the arms by a fraction of the size of a proton ...
The Helium Flash • When the temperature of a stellar core reaches T
... restructure itself in a manner similar to that of the hydrogenexhaustion phase. First, the stellar core will collapse, and a thick helium burning shell will form. The energy generated in this shell will push the adjacent material outward, thereby lowering the temperature and density of the hydrogen ...
... restructure itself in a manner similar to that of the hydrogenexhaustion phase. First, the stellar core will collapse, and a thick helium burning shell will form. The energy generated in this shell will push the adjacent material outward, thereby lowering the temperature and density of the hydrogen ...
2_ISM - UCT Astronomy Department
... density of smoke would be such that objects would disappear in haze at distance of much less than 1m!!! ...
... density of smoke would be such that objects would disappear in haze at distance of much less than 1m!!! ...
Galaxies
... 3. Furthermore, the approaching galaxies have to approach in roughly the same direction as the other one spins. ...
... 3. Furthermore, the approaching galaxies have to approach in roughly the same direction as the other one spins. ...
Using Star Charts
... If the sky is imagined to be a celestial sphere, then the stars may be represented on a map in much the same way that the spherical Earth can be mapped onto a flat piece of paper. The lines of latitude and longitude on a map of the Earth have their equivalent on a map of the celestial sphere, with t ...
... If the sky is imagined to be a celestial sphere, then the stars may be represented on a map in much the same way that the spherical Earth can be mapped onto a flat piece of paper. The lines of latitude and longitude on a map of the Earth have their equivalent on a map of the celestial sphere, with t ...
Science performance of Gaia, ESA`s space
... drifting through space in isolation and in orbit around other stars (Haywood and Jordi 2002). This data is vital for investigating the physics of star formation since brown dwarfs represent stars that “just did not make it” to core hydrogen fusion. • Gaia will contribute to solar-system science beca ...
... drifting through space in isolation and in orbit around other stars (Haywood and Jordi 2002). This data is vital for investigating the physics of star formation since brown dwarfs represent stars that “just did not make it” to core hydrogen fusion. • Gaia will contribute to solar-system science beca ...
Jura et al. 2004 - Department of Physics and Astronomy
... around our sample of stars is much larger than the inferred minimum, or the collision rate of these objects is substantially greater than in the Kuiper Belt of the Solar System. Two of the stars in Table 1, λ Boo itself and HR 1570, are λ Boo stars, a subclass of ∼2% of all main-sequence A-type star ...
... around our sample of stars is much larger than the inferred minimum, or the collision rate of these objects is substantially greater than in the Kuiper Belt of the Solar System. Two of the stars in Table 1, λ Boo itself and HR 1570, are λ Boo stars, a subclass of ∼2% of all main-sequence A-type star ...
docx - STAO
... An astrolabe illustrates how the sky looks at any given time of day and throughout the year. This is accomplished by drawing the sky (star patterns) on the astrolabe with moveable parts to adjust for the date and time. The traditional sky map astrolabe allowed people to locate celestial objects in t ...
... An astrolabe illustrates how the sky looks at any given time of day and throughout the year. This is accomplished by drawing the sky (star patterns) on the astrolabe with moveable parts to adjust for the date and time. The traditional sky map astrolabe allowed people to locate celestial objects in t ...
Local Horizon View
... Each object is catalogued as being at a certain set of coordinates in (RA,DEC). For objects visible at your latitude at a certain time of year (and night) the object will appear at a certain "hour angle“ east or west or your meridian for a given time. The Right Ascension of the object stays with the ...
... Each object is catalogued as being at a certain set of coordinates in (RA,DEC). For objects visible at your latitude at a certain time of year (and night) the object will appear at a certain "hour angle“ east or west or your meridian for a given time. The Right Ascension of the object stays with the ...
The Cosmic Perspective Our Galaxy
... What causes the blue and red colors in a photograph of a typical nebula? a) The ionizing photons from a hot star cause hydrogen gas to glow red and helium to glow blue. b) Dust grains scatter blue light and let red light pass through, similar to the blue sky and red sunsets in our atmosphere. c) ...
... What causes the blue and red colors in a photograph of a typical nebula? a) The ionizing photons from a hot star cause hydrogen gas to glow red and helium to glow blue. b) Dust grains scatter blue light and let red light pass through, similar to the blue sky and red sunsets in our atmosphere. c) ...
1. Chapter 10
... magine being born and raised on a tiny, remote island in the middle of a large ocean. If you and your neighbours had little ability to travel far from the island, your knowledge of the ocean and what lay beyond the horizon would be limited. You might come to understand the behaviour of the sea life ...
... magine being born and raised on a tiny, remote island in the middle of a large ocean. If you and your neighbours had little ability to travel far from the island, your knowledge of the ocean and what lay beyond the horizon would be limited. You might come to understand the behaviour of the sea life ...
ch19
... • X rays are observed from hot gas above and below the Milky Way's disk. © 2014 Pearson Education, Inc. ...
... • X rays are observed from hot gas above and below the Milky Way's disk. © 2014 Pearson Education, Inc. ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.