Redshift takes us from 2-D to 3-D
... Mysteries in the Big Bang Theory • The Horizon Problem – The cosmic background in all directions has the same temperature, yet opposite sides of the sky are not in “causal contact” (they are outside each other’s horizons). The largest COBE structures are also larger than their ...
... Mysteries in the Big Bang Theory • The Horizon Problem – The cosmic background in all directions has the same temperature, yet opposite sides of the sky are not in “causal contact” (they are outside each other’s horizons). The largest COBE structures are also larger than their ...
FORMATION OF LATE-TYPE SPIRAL GALAXIES: GAS RETURN
... matter halos through a combination of hierarchical merging and gas accretion along cold streams. Cosmological simulations thus predict that galaxies rapidly grow their bulge through mergers and instabilities and end up with most of their mass in the bulge and an angular momentum much below the obser ...
... matter halos through a combination of hierarchical merging and gas accretion along cold streams. Cosmological simulations thus predict that galaxies rapidly grow their bulge through mergers and instabilities and end up with most of their mass in the bulge and an angular momentum much below the obser ...
Open access - ORBi
... etc.) in the dusty disks to due gravitational interactions. There is therefore a major scientific interest in studying exozodiacal disks. The detection and characterization of exozodiacal disks by classical spectro-photometry is a very difficult task, because the spectral energy distribution of warm du ...
... etc.) in the dusty disks to due gravitational interactions. There is therefore a major scientific interest in studying exozodiacal disks. The detection and characterization of exozodiacal disks by classical spectro-photometry is a very difficult task, because the spectral energy distribution of warm du ...
Deep Space Mystery Note Form 3
... comprehension of the role of supernovae in the star formation process is growing. American astronomers Rudolph Minkowski and Fritz Zwicky developed the modern supernova classification scheme beginning in 1941. In the 1960s astronomers found that the maximum intensities of supernova explosions could ...
... comprehension of the role of supernovae in the star formation process is growing. American astronomers Rudolph Minkowski and Fritz Zwicky developed the modern supernova classification scheme beginning in 1941. In the 1960s astronomers found that the maximum intensities of supernova explosions could ...
Exercise 5
... have cataracts. Sketch the graph below, giving numbers on the x-axis where useful. ...
... have cataracts. Sketch the graph below, giving numbers on the x-axis where useful. ...
Chapter1&2Review
... 1. From what you know about astronomical units and light-years, how would you define a light-minute? 2. From what you know about astronomical units and light-years, how would you define a light-minute? 3. Describe the path that a star on the celestial equator follows from the time it rises until it ...
... 1. From what you know about astronomical units and light-years, how would you define a light-minute? 2. From what you know about astronomical units and light-years, how would you define a light-minute? 3. Describe the path that a star on the celestial equator follows from the time it rises until it ...
PH607lec10-4gal2
... Best interpretation of many of these is a trend in star formation history Early type spirals formed most of their stars early on (used up their gas, have older/redder stars) Late type spirals have substantial on-going star-formation, didn’t form as many stars early-on (and thus lots of gas left) ...
... Best interpretation of many of these is a trend in star formation history Early type spirals formed most of their stars early on (used up their gas, have older/redder stars) Late type spirals have substantial on-going star-formation, didn’t form as many stars early-on (and thus lots of gas left) ...
Part2
... o We’ve already seen that many galaxy properties are strongly covariant with one another. This include CO luminosity. o Both stellar luminosity and infrared luminosity (or some other tracer of star formation rate) are good places to start. ...
... o We’ve already seen that many galaxy properties are strongly covariant with one another. This include CO luminosity. o Both stellar luminosity and infrared luminosity (or some other tracer of star formation rate) are good places to start. ...
PDF file
... 3) Bound vs. unbound clusters. While many young stars are born in groups and clusters, most disperse rapidly; few clusters remain bound over timescales > 10 Myr. The conditions under which bound clusters are produced are not clear. Studies of older, widely-spread low-mass stars around young cluster ...
... 3) Bound vs. unbound clusters. While many young stars are born in groups and clusters, most disperse rapidly; few clusters remain bound over timescales > 10 Myr. The conditions under which bound clusters are produced are not clear. Studies of older, widely-spread low-mass stars around young cluster ...
Astronomy Assignment #1
... two statements can you make about it, based on this data? Several statements can be made from these data. First, Deneb is easily visible by the naked eye since its apparent magnitude is much brighter than the limit of naked eye visibility of m=6. Second, Deneb is much more luminous than the Sun. The ...
... two statements can you make about it, based on this data? Several statements can be made from these data. First, Deneb is easily visible by the naked eye since its apparent magnitude is much brighter than the limit of naked eye visibility of m=6. Second, Deneb is much more luminous than the Sun. The ...
Measuring colour in astronomy
... The spectrum of the Sun shows many absorption lines due to elements in its outer atmosphere. If we ignore these, the Sun’s spectrum is remarkably close to that of a perfect ‘black body’ at the same temperature. See the illustration above. By the term 'black body', scientists mean an object which wou ...
... The spectrum of the Sun shows many absorption lines due to elements in its outer atmosphere. If we ignore these, the Sun’s spectrum is remarkably close to that of a perfect ‘black body’ at the same temperature. See the illustration above. By the term 'black body', scientists mean an object which wou ...
Star Counts Lab
... How many stars can you see? People say that some really big number is “more than the stars in the sky,” but how many is that? In this lab you will make an estimate of how many stars you could see if you could see the entire sky with your naked eye. It would not be possible to count all the stars vis ...
... How many stars can you see? People say that some really big number is “more than the stars in the sky,” but how many is that? In this lab you will make an estimate of how many stars you could see if you could see the entire sky with your naked eye. It would not be possible to count all the stars vis ...
X-ray binaries
... by the NS. The particle are deviated from the original trajectory and converge behind the NS. There they collide, loosing their energies and then fall toward the NS. AS they come closer the grav. Field accelerates them to very high energies. In the second panel the NS is surrounded by a strong B fie ...
... by the NS. The particle are deviated from the original trajectory and converge behind the NS. There they collide, loosing their energies and then fall toward the NS. AS they come closer the grav. Field accelerates them to very high energies. In the second panel the NS is surrounded by a strong B fie ...
A near IR adaptive optics search for faint companions to early
... with a 2562 NICMOS detector (Hofmann et al. 1992). In most cases, a coronographic mask of 200 diameter (Beuzit et al. 1997b) was used to reduce the light from the primary. The observations were carried out on March 28 and 29, 1997, mainly in the J and SK bands with an image scale of 50 milliarcsec/p ...
... with a 2562 NICMOS detector (Hofmann et al. 1992). In most cases, a coronographic mask of 200 diameter (Beuzit et al. 1997b) was used to reduce the light from the primary. The observations were carried out on March 28 and 29, 1997, mainly in the J and SK bands with an image scale of 50 milliarcsec/p ...
Document
... Dwarf nova: disk instability, outbursts 2-7 mag every week-30 yrs Novalike: high, low states on timescales of months, high accretion AM CVn: 2 white dwarfs, orbital periods of 10-45 min ...
... Dwarf nova: disk instability, outbursts 2-7 mag every week-30 yrs Novalike: high, low states on timescales of months, high accretion AM CVn: 2 white dwarfs, orbital periods of 10-45 min ...
Document
... The Sun as pulsating star 5-minute oscillations of the Sun were discovered in 1962. amplitudes of the brightness variations: ~2 mag amplitudes of the radial velocity variations: ~20 cm/s oscillations periods: 3-25 min lifetimes of modes: of the order of days, weeks number of modes: ~ 107 ...
... The Sun as pulsating star 5-minute oscillations of the Sun were discovered in 1962. amplitudes of the brightness variations: ~2 mag amplitudes of the radial velocity variations: ~20 cm/s oscillations periods: 3-25 min lifetimes of modes: of the order of days, weeks number of modes: ~ 107 ...
galaxy distance
... A team of astronomers looking deep into the heavens has discovered the earliest, most distant galaxy yet. A galaxy is a system of millions or billions of stars and gas or dust, held together by gravity. This one was spotted a recordbreaking 670 million years from the Big Bang, the massive explosion ...
... A team of astronomers looking deep into the heavens has discovered the earliest, most distant galaxy yet. A galaxy is a system of millions or billions of stars and gas or dust, held together by gravity. This one was spotted a recordbreaking 670 million years from the Big Bang, the massive explosion ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.