13.1 Galaxy Evolution: Introduction
... to remember is that more massive stars evolve much faster. They are more luminous. They are also hotter, so they're energetically more important, but not for long. Thus, spectrum of an evolving galaxy will change more rapidly in the blue parts of the spectrum, thanks to the short l ...
... to remember is that more massive stars evolve much faster. They are more luminous. They are also hotter, so they're energetically more important, but not for long. Thus, spectrum of an evolving galaxy will change more rapidly in the blue parts of the spectrum, thanks to the short l ...
S1_Testbank
... 6) For vacation, you decide to take a solo boat trip. While contemplating the universe, you lose track of your location. Fortunately, you have some astronomical tables and instruments, as well as a UT clock. You thereby put together the following description of your situation: ∙ It is the day of th ...
... 6) For vacation, you decide to take a solo boat trip. While contemplating the universe, you lose track of your location. Fortunately, you have some astronomical tables and instruments, as well as a UT clock. You thereby put together the following description of your situation: ∙ It is the day of th ...
1 HABITABLE ZONES IN THE UNIVERSE GUILLERMO GONZALEZ
... Hart (1978, 1979) presented a detailed and mathematical study of the CHZ. He modeled the evolution of the Earth’s climate since its formation, including volcanic outgassing, atmospheric loss, the greenhouse effect, albedo variations, biomass variation, various geophysical processes, and the gradual ...
... Hart (1978, 1979) presented a detailed and mathematical study of the CHZ. He modeled the evolution of the Earth’s climate since its formation, including volcanic outgassing, atmospheric loss, the greenhouse effect, albedo variations, biomass variation, various geophysical processes, and the gradual ...
No Slide Title
... High-mass stars have more fuel available (larger gas tanks) However, they burn their fuel more quickly (always speeding) In the end, they run out of gas sooner. How much fuel is available Mass t ...
... High-mass stars have more fuel available (larger gas tanks) However, they burn their fuel more quickly (always speeding) In the end, they run out of gas sooner. How much fuel is available Mass t ...
Dark Matter Search
... • Gamma rays tracing hadronic processes are of particular interest for neutrino observations. • Neutrino observations may be critical to learning the nature of gamma-ray sources. – The Universe is mainly transparent to gamma rays with energies ...
... • Gamma rays tracing hadronic processes are of particular interest for neutrino observations. • Neutrino observations may be critical to learning the nature of gamma-ray sources. – The Universe is mainly transparent to gamma rays with energies ...
- ANU Repository
... Accepted 2016 January 11. Received 2016 January 8; in original form 2015 June 27 ...
... Accepted 2016 January 11. Received 2016 January 8; in original form 2015 June 27 ...
Red supergiants around the obscured open cluster Stephenson 2
... Anderson et al. 2011), where tens of sources display radial velocities in the vLSR ≈ 90 − 105 km s−1 interval. This is generally interpreted as the tangent point of the Scutum-Crux arm. There is a secondary maximum towards l ∼ 24◦ , where many sources have vLSR ≈ 110 km s−1 , similar to the systemic ...
... Anderson et al. 2011), where tens of sources display radial velocities in the vLSR ≈ 90 − 105 km s−1 interval. This is generally interpreted as the tangent point of the Scutum-Crux arm. There is a secondary maximum towards l ∼ 24◦ , where many sources have vLSR ≈ 110 km s−1 , similar to the systemic ...
Isotopic composition of Hg and Pt in 5 slowly rotating HgMn stars *
... taken from Kalus et al. (1998). Terrestrial isotopic abun- The wavelength ranges that were observed contain a numdances were taken from Anders & Grevesse (1989), while ber of spectral lines of other elements. In the process of the hyperne intensities were obtained from Engleman's computing the synt ...
... taken from Kalus et al. (1998). Terrestrial isotopic abun- The wavelength ranges that were observed contain a numdances were taken from Anders & Grevesse (1989), while ber of spectral lines of other elements. In the process of the hyperne intensities were obtained from Engleman's computing the synt ...
The National Centre for Radio Astrophysics
... The Epoch of Reionization (EoR) is the last phase transition in the Universe, during which the intergalactic medium moves from being predominantly neutral to being predominantly ionized. It has long been known that the EoR provides an outstanding probe of cosmology; detecting redshifted HI 21cm emis ...
... The Epoch of Reionization (EoR) is the last phase transition in the Universe, during which the intergalactic medium moves from being predominantly neutral to being predominantly ionized. It has long been known that the EoR provides an outstanding probe of cosmology; detecting redshifted HI 21cm emis ...
white dwarfs and the age of the universe
... the interstellar medium [9], winds and so on. There is now a broad opinion that the distinction among the character DA and non–DA is inherited (i.e., it is linked to the origin of the white dwarf itself) although a fraction of them can change their external aspect during the evolution [10]. Standard ...
... the interstellar medium [9], winds and so on. There is now a broad opinion that the distinction among the character DA and non–DA is inherited (i.e., it is linked to the origin of the white dwarf itself) although a fraction of them can change their external aspect during the evolution [10]. Standard ...
Extrasolar Cosmochemistry
... We now consider the amount of mass required in our standard model; we argue that minor planets such as asteroids are the dominant source for the pollution of white dwarf atmospheres, although there might be instances in which tidal disruption and accretion of an entire planet the size of Mars has oc ...
... We now consider the amount of mass required in our standard model; we argue that minor planets such as asteroids are the dominant source for the pollution of white dwarf atmospheres, although there might be instances in which tidal disruption and accretion of an entire planet the size of Mars has oc ...
MODULE 3: NAVIGATION AND THE AGE OF
... The disc was held, using the ring on top, so that the horizontal axis lined up with the horizon. The sun was sighted along the movable bar attached (like the hand of a clock) to the center, and the angle of elevation could be determined. An improvement on the astrolabe was the sextant, which could m ...
... The disc was held, using the ring on top, so that the horizontal axis lined up with the horizon. The sun was sighted along the movable bar attached (like the hand of a clock) to the center, and the angle of elevation could be determined. An improvement on the astrolabe was the sextant, which could m ...
Lab 14 Galaxy Morphology
... orbit around the central point of the galaxy. The central point in a galaxy is referred to as the “nucleus”. In some galaxies, there are enormous black holes that sit right at the center. These black holes can have a mass that is a billion times that of the Sun (109 M! )! But not all galaxies have t ...
... orbit around the central point of the galaxy. The central point in a galaxy is referred to as the “nucleus”. In some galaxies, there are enormous black holes that sit right at the center. These black holes can have a mass that is a billion times that of the Sun (109 M! )! But not all galaxies have t ...
Brahe, Kepler
... ``Consecrated to the all-good, great God and Posterity. Tycho Brahe, Son of Otto, who realized that Astronomy, the oldest and most distinguished of all sciences, had indeed been studied for a long time and to a great extent, but still had not obtained sufficient firmness or had been purified of erro ...
... ``Consecrated to the all-good, great God and Posterity. Tycho Brahe, Son of Otto, who realized that Astronomy, the oldest and most distinguished of all sciences, had indeed been studied for a long time and to a great extent, but still had not obtained sufficient firmness or had been purified of erro ...
11 The Interstellar Medium
... This H–R diagram shows the evolution of stars somewhat more and somewhat less massive than the Sun. The shape of the paths is similar, but they wind up in different places on the main sequence. ...
... This H–R diagram shows the evolution of stars somewhat more and somewhat less massive than the Sun. The shape of the paths is similar, but they wind up in different places on the main sequence. ...
Finding habitable earths around white dwarfs with a robotic
... shows the size of that star versus time, and during the red giant phase the white dwarf habitable zone (WDHZ) will be engulfed by the star, leaving no planets after this phase. However, it may be possible that planets could arrive in the WDHZ after the red giant phase, either by reforming close to t ...
... shows the size of that star versus time, and during the red giant phase the white dwarf habitable zone (WDHZ) will be engulfed by the star, leaving no planets after this phase. However, it may be possible that planets could arrive in the WDHZ after the red giant phase, either by reforming close to t ...
Condensates in Neutron Star Interiors
... later, in 1731, John Bevis discovered the supernova remnant, which was later christened the Crab nebula (or M1, the first entry in the Messier catalogue). Finally, in 1968, a radio wave source was discovered in the nebula which pulsates with a period of 33 ms. The source was characterized as a compa ...
... later, in 1731, John Bevis discovered the supernova remnant, which was later christened the Crab nebula (or M1, the first entry in the Messier catalogue). Finally, in 1968, a radio wave source was discovered in the nebula which pulsates with a period of 33 ms. The source was characterized as a compa ...
IFAS Novice Handbook - Indiana Astronomical Society
... Even in ancient times, it was known that a number of "stars" did not stay in the same position relative to the others. There were five such restless "stars" known-Mercury, Venus, Mars, Jupiter, and Saturn-and the Greeks referred to them as planetes, a word which means "wanderers." That Earth is one ...
... Even in ancient times, it was known that a number of "stars" did not stay in the same position relative to the others. There were five such restless "stars" known-Mercury, Venus, Mars, Jupiter, and Saturn-and the Greeks referred to them as planetes, a word which means "wanderers." That Earth is one ...
The Probability and Effects of an Asteroid Impact with Earth
... David Turner Saint Mary’s University ...
... David Turner Saint Mary’s University ...
A Search for Exozodiacal Dust and Faint Companions near Sirius
... analysis of a silicate emission feature at 10 km (Telesco & Knacke 1991 ; Knacke et al. 1993). Others, like the disk around HR 4796, show marginally resolved emission at 10 km that is interpreted as exozodiacal (Koerner et al. 1998). Dust clouds like these, which have D1000 times as much warm dust a ...
... analysis of a silicate emission feature at 10 km (Telesco & Knacke 1991 ; Knacke et al. 1993). Others, like the disk around HR 4796, show marginally resolved emission at 10 km that is interpreted as exozodiacal (Koerner et al. 1998). Dust clouds like these, which have D1000 times as much warm dust a ...
ISP 205: Visions of the Universe
... For a 14 billion year old universe, our observable universe is 14 billion light-years in radius. © 2005 Pearson Education Inc., publishing as Addison-Wesley ...
... For a 14 billion year old universe, our observable universe is 14 billion light-years in radius. © 2005 Pearson Education Inc., publishing as Addison-Wesley ...
ULXs: General Properties and Variability - X
... luminous photo-ionized nebulae around them- require high luminosity to photoionize them •Quite a few have “soft” components well fit by low kT black body- consistent with high mass (Miller this meeting). ...
... luminous photo-ionized nebulae around them- require high luminosity to photoionize them •Quite a few have “soft” components well fit by low kT black body- consistent with high mass (Miller this meeting). ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.