Implications of the Search and Discovery of Life in the Universe
... • Perhaps life in “oceans” beneath cloudy atmosphere ...
... • Perhaps life in “oceans” beneath cloudy atmosphere ...
Summary of Talks at Growing Black Holes 2004 in Garching
... mass BHs are growing faster at the present time (because they are more active). (DOWNSIZING of BH growth) Volume averaged star formation rate is 1000 times the accretion rate on BHs. This implies that even at the present day, SFR and activity rate are linked. The growth times of both activities tr ...
... mass BHs are growing faster at the present time (because they are more active). (DOWNSIZING of BH growth) Volume averaged star formation rate is 1000 times the accretion rate on BHs. This implies that even at the present day, SFR and activity rate are linked. The growth times of both activities tr ...
History of IGM (C. Carilli)
... • FIR luminous galaxy at z=6.42: 1e13 Lsun observe dust, gas, star formation, AGN • Merging(?) galaxy: Molecular gas mass = 2x1010 M_sun, M_dyn = 6e10 M_sun • Early enrichment of heavy elements and dust produced in the first stars => star formation commenced at 0.4 Gyr after the big bang • Coeval fo ...
... • FIR luminous galaxy at z=6.42: 1e13 Lsun observe dust, gas, star formation, AGN • Merging(?) galaxy: Molecular gas mass = 2x1010 M_sun, M_dyn = 6e10 M_sun • Early enrichment of heavy elements and dust produced in the first stars => star formation commenced at 0.4 Gyr after the big bang • Coeval fo ...
The Sagittarius dwarf irregular galaxy
... LK00, respectively. This distance indicates that SagDIG is a member of the Local Group (LG), confirming the evidence from its negative radial velocity and position in the V vs. cos θ diagram (van den Bergh 1994; Pritchet & van den Bergh 1999). Both studies, while adopting different estimates for th ...
... LK00, respectively. This distance indicates that SagDIG is a member of the Local Group (LG), confirming the evidence from its negative radial velocity and position in the V vs. cos θ diagram (van den Bergh 1994; Pritchet & van den Bergh 1999). Both studies, while adopting different estimates for th ...
The Sagittarius dwarf irregular galaxy: Metallicity and stellar
... LK00, respectively. This distance indicates that SagDIG is a member of the Local Group (LG), confirming the evidence from its negative radial velocity and position in the V vs. cos θ diagram (van den Bergh 1994; Pritchet & van den Bergh 1999). Both studies, while adopting different estimates for th ...
... LK00, respectively. This distance indicates that SagDIG is a member of the Local Group (LG), confirming the evidence from its negative radial velocity and position in the V vs. cos θ diagram (van den Bergh 1994; Pritchet & van den Bergh 1999). Both studies, while adopting different estimates for th ...
The Evolutionary Status of Be Stars in Clusters and in the Galactic
... Figure 5: HR diagram for B stars in the Perseus double cluster. Symbols and solid lines as in Fig. 3. The cluster sequence is clearly defined in the figure, and hence the evolutionary status of each star is unambiguously determined from its position in the HR diagram. In this single age stellar samp ...
... Figure 5: HR diagram for B stars in the Perseus double cluster. Symbols and solid lines as in Fig. 3. The cluster sequence is clearly defined in the figure, and hence the evolutionary status of each star is unambiguously determined from its position in the HR diagram. In this single age stellar samp ...
Name
... A) It can be open 24 hours and 7 days of week B) The space-based telescope is closer to the objects it studies. C) You do not have to worry about distorting effects of atmosphere D) There is no extra background of light due to scattering of light in the Earth’s atmosphere. E) You can observe in more ...
... A) It can be open 24 hours and 7 days of week B) The space-based telescope is closer to the objects it studies. C) You do not have to worry about distorting effects of atmosphere D) There is no extra background of light due to scattering of light in the Earth’s atmosphere. E) You can observe in more ...
Name
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two 100 kg balls that are 1 km apart. E) Two bodies each with the mass of Jupiter that are 10 AU apart. 18) Which ...
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two 100 kg balls that are 1 km apart. E) Two bodies each with the mass of Jupiter that are 10 AU apart. 18) Which ...
Document
... – little star formation Quick Time™a nd a TIFF ( Uncomp res sed) deco mpre ssor are n eede d to s ee this picture . ...
... – little star formation Quick Time™a nd a TIFF ( Uncomp res sed) deco mpre ssor are n eede d to s ee this picture . ...
Project 3. Colour in Astronomy
... The photo above shows the open cluster M50. The variety of colours of the stars is obvious. Open clusters typically contain hundreds of stars, many of which are bright, young, and blue. In fact, most of the bright blue stars in the above picture belong to M50, but most of the dimmer, red stars do no ...
... The photo above shows the open cluster M50. The variety of colours of the stars is obvious. Open clusters typically contain hundreds of stars, many of which are bright, young, and blue. In fact, most of the bright blue stars in the above picture belong to M50, but most of the dimmer, red stars do no ...
Variable Blue Stragglers in M67
... study. I report here the progress and some results drawn from this project. ...
... study. I report here the progress and some results drawn from this project. ...
Class 1 and 2 lecture slides (Solar System Formation)
... • As the nebula collapses, it forms a spinning disk (due to conservation of angular momentum) • The collapse releases gravitational energy, which heats the centre; this central hot portion forms a star • The outer, cooler particles suffer repeated collisions, building planet-sized bodies from dust g ...
... • As the nebula collapses, it forms a spinning disk (due to conservation of angular momentum) • The collapse releases gravitational energy, which heats the centre; this central hot portion forms a star • The outer, cooler particles suffer repeated collisions, building planet-sized bodies from dust g ...
PRE-LAB
... invented sky charts that are comparable to maps. Maps have a coordinate system — you can find any place on EARTH by specifying its LONGITUDE and LATITUDE (the x and y axis). Below you can see what we mean by LONGITUDE and LATITUDE. The positions of the stars in the sky are described in the same mann ...
... invented sky charts that are comparable to maps. Maps have a coordinate system — you can find any place on EARTH by specifying its LONGITUDE and LATITUDE (the x and y axis). Below you can see what we mean by LONGITUDE and LATITUDE. The positions of the stars in the sky are described in the same mann ...
Presentazione di PowerPoint
... + Kapteyn Astronomical Institute, Groningen, Olanda Elliptical galaxies may be imagined to have formed from collisionless collapse, reaching dynamical equilibrium by incomplete violent relaxation. We have tested this picture by showing that analytical models constructed under the above scenario and ...
... + Kapteyn Astronomical Institute, Groningen, Olanda Elliptical galaxies may be imagined to have formed from collisionless collapse, reaching dynamical equilibrium by incomplete violent relaxation. We have tested this picture by showing that analytical models constructed under the above scenario and ...
Station A Star Charts I
... In words, the number of stars born with a mass equal to m is proportional to m-2.3; the constant k is the same for all stars. Using this function, how many times more stars are born with masses of 1 MSun than are born with masses of 20 MSun? Give your answer to two significant figures. D4. (3 pts) U ...
... In words, the number of stars born with a mass equal to m is proportional to m-2.3; the constant k is the same for all stars. Using this function, how many times more stars are born with masses of 1 MSun than are born with masses of 20 MSun? Give your answer to two significant figures. D4. (3 pts) U ...
A sound nebula: the origin of the Solar System in the field of a
... to give extra energy to the wave reflected from the central region. The reflected wave travelled all the way from the centre to the periphery of the spherical nebula, was reflected from the gravitational pause and then returned to the centre again, causing another explosion. This process, repeated s ...
... to give extra energy to the wave reflected from the central region. The reflected wave travelled all the way from the centre to the periphery of the spherical nebula, was reflected from the gravitational pause and then returned to the centre again, causing another explosion. This process, repeated s ...
Gas Mixing, Gas Cycles and the Chemical Evolution of Dwarf
... similar starbursting objects at intermediate redshifts have already reached solar oxygen values but with an average log(N/O) by 0.3 to 0.4 dex lower than solar (Kobulnicky & Zaritzky 1999). The location of dIrrs on the SNP line is determined by their e ective yield. And in the case of di erential O ...
... similar starbursting objects at intermediate redshifts have already reached solar oxygen values but with an average log(N/O) by 0.3 to 0.4 dex lower than solar (Kobulnicky & Zaritzky 1999). The location of dIrrs on the SNP line is determined by their e ective yield. And in the case of di erential O ...
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.