X-Ray Spectroscopy of Stars
... 4.2.2 Results from high-resolution spectra . . . . . . . . . . . . . . . . . . . . . . . 4.2.3 A new paradigm? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 The case of early B-stars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 Do Wolf-Rayet stars emi ...
... 4.2.2 Results from high-resolution spectra . . . . . . . . . . . . . . . . . . . . . . . 4.2.3 A new paradigm? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 The case of early B-stars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.4 Do Wolf-Rayet stars emi ...
8th Grade Science Midterm Exam Review ____ 1. Look at the figure
... ____ 36. Scientific research has led to many life-changing discoveries, such as the Internet. Which of these statements describes the greatest impact of the Internet on society? A. People can track and store their personal financial records. B. People can connect to databases of information around t ...
... ____ 36. Scientific research has led to many life-changing discoveries, such as the Internet. Which of these statements describes the greatest impact of the Internet on society? A. People can track and store their personal financial records. B. People can connect to databases of information around t ...
kdtalk_jun2005 - The HST Treasury Program on Eta Carinae
... A few years ago Nir Shaviv discovered that it doesn’t work the way that everyone assumed. His best, most concrete example was the Great Eruption of Eta Carinae. ...
... A few years ago Nir Shaviv discovered that it doesn’t work the way that everyone assumed. His best, most concrete example was the Great Eruption of Eta Carinae. ...
STARLAB
... Charioteer, Lepus the Hare, Draco, and the Pleiades. Look at these constellations using the Constellation Cylinder. Hand out arrow pointers and show their locations. Look at the Starfield Cylinder and try to locate the same constellations. After leaving STARLAB, hand out star maps, and show the prop ...
... Charioteer, Lepus the Hare, Draco, and the Pleiades. Look at these constellations using the Constellation Cylinder. Hand out arrow pointers and show their locations. Look at the Starfield Cylinder and try to locate the same constellations. After leaving STARLAB, hand out star maps, and show the prop ...
Galaxies
... 7 respectively (Reddy & Steidel 2009; Bouwens et al. 2008). Magnitude limits are the same as those shown in Figure 9.4. ...
... 7 respectively (Reddy & Steidel 2009; Bouwens et al. 2008). Magnitude limits are the same as those shown in Figure 9.4. ...
IOTA Observer`s Manual
... of asteroids in our solar system. In 1985, Pluto’s atmosphere was discovered by the occultation technique. In March 1977, the occultation of a bright star by the planet Uranus resulted in the discovery of its ring system. This ring system might actually have been seen indirectly by the discoverer of ...
... of asteroids in our solar system. In 1985, Pluto’s atmosphere was discovered by the occultation technique. In March 1977, the occultation of a bright star by the planet Uranus resulted in the discovery of its ring system. This ring system might actually have been seen indirectly by the discoverer of ...
Observational Studies of Interacting Galaxies and the Development
... are not all formed via merging processes, unless the merging timescale is much longer than the expected value. Spectroscopically, the kinematic properties of close pair galaxies were studied to understand how star formation were quenched at z ∼ 0.5. I discovered that the number of red-red pairs are ...
... are not all formed via merging processes, unless the merging timescale is much longer than the expected value. Spectroscopically, the kinematic properties of close pair galaxies were studied to understand how star formation were quenched at z ∼ 0.5. I discovered that the number of red-red pairs are ...
Galaxy Disks Further
... Despite the correlations between overall properties, there are galaxies with very similar properties but very different morphologies. M33 and the Large Magellanic Cloud (LMC) provide an example. Both galaxies have very similar central surface brightnesses (∼21.2 B-mag arcsec−2 ), scalelengths (∼1.6 ...
... Despite the correlations between overall properties, there are galaxies with very similar properties but very different morphologies. M33 and the Large Magellanic Cloud (LMC) provide an example. Both galaxies have very similar central surface brightnesses (∼21.2 B-mag arcsec−2 ), scalelengths (∼1.6 ...
Counting Sunspots - Lunar and Planetary Institute
... the cycle has been relatively uniform this century, there have been large variations in the past. From about 1645 to 1715, a period known as the Maunder minimum, apparently few sunspots were present on the Sun. Also during that period, the Earth was much cooler than it http://www.makeitsolar.com/puz ...
... the cycle has been relatively uniform this century, there have been large variations in the past. From about 1645 to 1715, a period known as the Maunder minimum, apparently few sunspots were present on the Sun. Also during that period, the Earth was much cooler than it http://www.makeitsolar.com/puz ...
FY96
... to cool beyond this limiting luminosity. Thus, the ages of the least luminous white dwarfs that can be found provide a lower limit for the age of the disk of the Galaxy. A necessary step in establishing the age of a white dwarf is to derive quantities such as the temperature, composition and surface ...
... to cool beyond this limiting luminosity. Thus, the ages of the least luminous white dwarfs that can be found provide a lower limit for the age of the disk of the Galaxy. A necessary step in establishing the age of a white dwarf is to derive quantities such as the temperature, composition and surface ...
environmental effects on galaxy evolution in nearby clusters
... The observational evidences presented in this work suggest that: (I) Giant ellipticals are an old, homogeneous population showing no or little evolution at least in the past 8 Gyr; unlike dwarf ellipticals which still contain young stellar populations. (II) The importance of different environmental ...
... The observational evidences presented in this work suggest that: (I) Giant ellipticals are an old, homogeneous population showing no or little evolution at least in the past 8 Gyr; unlike dwarf ellipticals which still contain young stellar populations. (II) The importance of different environmental ...
Mapping the Pathways of Galaxy Transformation Across Time and
... outcomes from the IMACS Cluster-Building Survey: our finding that most z∼0.5 poststarbursts are rejuvenated passive galaxies, and a simple model positing that every galaxy has a lognormal SFH whose parameters are set at birth. Both studies reinterpreted key metrics of galaxy evolution typically seen ...
... outcomes from the IMACS Cluster-Building Survey: our finding that most z∼0.5 poststarbursts are rejuvenated passive galaxies, and a simple model positing that every galaxy has a lognormal SFH whose parameters are set at birth. Both studies reinterpreted key metrics of galaxy evolution typically seen ...
Galaxies - hwchemistry
... observe it. – Studies show that type Ia supernovae—caused by the collapse of a white dwarf—all reach about the same absolute magnitude at maximum. – By searching for Cepheids and other distance indicators in nearby galaxies where type Ia supernovae have occurred, astronomers have been able to calibr ...
... observe it. – Studies show that type Ia supernovae—caused by the collapse of a white dwarf—all reach about the same absolute magnitude at maximum. – By searching for Cepheids and other distance indicators in nearby galaxies where type Ia supernovae have occurred, astronomers have been able to calibr ...
Observational evidence for AGN feedback in early
... activity, black hole activity, the composite of the two and quiescence. We find that emission is mostly LINER (low ionization nuclear emission line region) like in high-mass galaxies (σ > 200 km s−1 ) and roughly evenly distributed between star formation and AGN at intermediate and low (σ < 100 km s ...
... activity, black hole activity, the composite of the two and quiescence. We find that emission is mostly LINER (low ionization nuclear emission line region) like in high-mass galaxies (σ > 200 km s−1 ) and roughly evenly distributed between star formation and AGN at intermediate and low (σ < 100 km s ...
THE STAR FORMATION AND NUCLEAR ACCRETION HISTORIES OF NORMAL GALAXIES
... ∼ 1 and, if so, they could produce a substantial fraction of the “normal” galaxy X-ray flux at these redshifts. Given their similar evolution, spectral shapes (e.g., Ptak et al. 1999), and potentially similar luminosities, it may be difficult to disentangle the X-ray emission from AGNs and star form ...
... ∼ 1 and, if so, they could produce a substantial fraction of the “normal” galaxy X-ray flux at these redshifts. Given their similar evolution, spectral shapes (e.g., Ptak et al. 1999), and potentially similar luminosities, it may be difficult to disentangle the X-ray emission from AGNs and star form ...
Abstract The Star Formation History of Low Surface Brightness Galaxies
... mater, Seoul National University. In particular, Prof. Myung Gyoon Lee nurtured me with a great care while I was just an ignorant undergradute. My nine years of graduate life left me many memories with graduate students who enjoyed and suffered together. First, I can not forego the “usual suspects”. ...
... mater, Seoul National University. In particular, Prof. Myung Gyoon Lee nurtured me with a great care while I was just an ignorant undergradute. My nine years of graduate life left me many memories with graduate students who enjoyed and suffered together. First, I can not forego the “usual suspects”. ...
On the characterisation of the Galactic warp in the Gaia era
... all of your support and patience, aspiring guidance and immense knowledge. You always made time to help and advise me. I have been a pleasure for me to work with you. Also, I really appreciate you being so sensitive and supportive towards women’s right. Thank you Luis for being such an incredible te ...
... all of your support and patience, aspiring guidance and immense knowledge. You always made time to help and advise me. I have been a pleasure for me to work with you. Also, I really appreciate you being so sensitive and supportive towards women’s right. Thank you Luis for being such an incredible te ...
my dissertation (PhD. Thesis) - Argelander
... of all sizes and distances ranging from our “backyard”, namely the Milky Way itself and the Local Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned b ...
... of all sizes and distances ranging from our “backyard”, namely the Milky Way itself and the Local Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned b ...
Hubble 2006: Science Year in Review
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
The evolution of close binaries with white dwarf components
... When one of the stars overflows its Roche lobe, it tends to lose most of its envelope. The evolution of the star is significantly shortened or even stopped prematurely. In the latter case, nuclear burning ceases after the mass transfer phase. Consequently, the inert core contracts and cools down to fo ...
... When one of the stars overflows its Roche lobe, it tends to lose most of its envelope. The evolution of the star is significantly shortened or even stopped prematurely. In the latter case, nuclear burning ceases after the mass transfer phase. Consequently, the inert core contracts and cools down to fo ...
Preliminary Talk Abstract Book - MoCA
... Massive early-type galaxies (ETGs) are on average more compact (smaller size and higher velocity dispersion) at higher redshift. Galaxy mergers are believed to contribute substantially to this cosmological galaxy growth. I will present the results of theoretical models for the joint evolution of mas ...
... Massive early-type galaxies (ETGs) are on average more compact (smaller size and higher velocity dispersion) at higher redshift. Galaxy mergers are believed to contribute substantially to this cosmological galaxy growth. I will present the results of theoretical models for the joint evolution of mas ...
The most metal-poor galaxies
... one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10−4 times that of the Sun (Cayrel 1996) while stars in the Galactic centre may be three tim ...
... one looks, this quantity may vary substantially. For example in our Galaxy, the bulge, the solar neighbourhood and the halo differ in metallicity. The most metal-poor halo stars have heavy element abundances 10−4 times that of the Sun (Cayrel 1996) while stars in the Galactic centre may be three tim ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.