Cooling of Compact Stars
... How to distinguish the different types of Hybrid star models from cooling evolution? ...
... How to distinguish the different types of Hybrid star models from cooling evolution? ...
Stellar Populations Science
... Ca, Mg, Ti, C), and measure kinematics with v~1 km s-1 (e.g. Rich et al. 2007) ...
... Ca, Mg, Ti, C), and measure kinematics with v~1 km s-1 (e.g. Rich et al. 2007) ...
CASPEC Observations of the Most Metal-Deficient Main
... crease towards later B types. Usually, at B 9 only Ha is in emission and Hfi is only seen up to 88. Before A0 the emissions are much stronger than the level of the continuum (see also Slettebak, 1986) whereas for A-type stars no case is known with emission exceeding this level. This is so striking t ...
... crease towards later B types. Usually, at B 9 only Ha is in emission and Hfi is only seen up to 88. Before A0 the emissions are much stronger than the level of the continuum (see also Slettebak, 1986) whereas for A-type stars no case is known with emission exceeding this level. This is so striking t ...
Carbon monoxide in clouds at low metallicity in the dwarf irregular
... where stars form, but it has never been detected in galaxies in which the oxygen abundance relative to hydrogen is less than 20 per cent of that of the Sun, even though such ‘low-metallicity’ galaxies often form stars. This raises the question of whether stars can form in dense gas without molecules ...
... where stars form, but it has never been detected in galaxies in which the oxygen abundance relative to hydrogen is less than 20 per cent of that of the Sun, even though such ‘low-metallicity’ galaxies often form stars. This raises the question of whether stars can form in dense gas without molecules ...
Stars and Galaxies
... Massive Stars • Mass of massive stars 6x that of sun • Take same path as medium-sized stars except for after red giant stage they do not become white dwarfs • Carbon atoms continue to fuse creating heavier elements like oxygen & nitrogen • Core of massive star so hot that fusion continues until the ...
... Massive Stars • Mass of massive stars 6x that of sun • Take same path as medium-sized stars except for after red giant stage they do not become white dwarfs • Carbon atoms continue to fuse creating heavier elements like oxygen & nitrogen • Core of massive star so hot that fusion continues until the ...
Activity 1 - Mathematical and Scientific Methods
... 65% of your grade will come from active involvement! ...
... 65% of your grade will come from active involvement! ...
Slide 1
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
... •Ellipticals have lots of globular clusters (about twice that of disk galaxies) •these fall into two groups based on color •color determined by metallicity, with more metal-rich GCs (redder) possibly the result of galaxy mergers •Ellipticals have much less cool, atomic gas than spiral galaxies •< 1 ...
The Big Bang
... exploded out of the big bang did not distribute itself evenly throughout the universe? What evidence supports this hypothesis? According to this theory, how old is the universe? ...
... exploded out of the big bang did not distribute itself evenly throughout the universe? What evidence supports this hypothesis? According to this theory, how old is the universe? ...
Astronomy Practice Test
... _____ a small rocky object in space b) meteorite _____ a bright streak of light caused by an object falling through c) meteoroid the Earth’s atmosphere _____ a piece of space debris that reaches the ground d) comet _____ a piece of space debris that is trapped by the Earth’s e) asteroid gravity and ...
... _____ a small rocky object in space b) meteorite _____ a bright streak of light caused by an object falling through c) meteoroid the Earth’s atmosphere _____ a piece of space debris that reaches the ground d) comet _____ a piece of space debris that is trapped by the Earth’s e) asteroid gravity and ...
Lecture 13
... system to the red and infrared, with R,I,J,K,L,M,N.... bands. • In the optical, then, we have the UBVRI broadband system. • It was found that the UBV system did not work well for very cool stars, like K and M spectral types, and these very red stars were easier to study at redder wavelengths. So the ...
... system to the red and infrared, with R,I,J,K,L,M,N.... bands. • In the optical, then, we have the UBVRI broadband system. • It was found that the UBV system did not work well for very cool stars, like K and M spectral types, and these very red stars were easier to study at redder wavelengths. So the ...
Measuring large distances
... As the other side turns away, its light is slightly red-shifted. The more shifting, the faster the rotational speed, the brighter the galaxy. Again, compare the brightness it should have with what is observed. ...
... As the other side turns away, its light is slightly red-shifted. The more shifting, the faster the rotational speed, the brighter the galaxy. Again, compare the brightness it should have with what is observed. ...
ppt - Serbian Virtual Observatory - astronomical observatory belgrade
... between the two institutions: Astronomical Institute of Bulgarian Academy of Sciences and Astronomical Observatory in Belgrade, including also research field of double stars. In the framework of this cooperation we have had observations at both NAO Rozhen and AS Vidojevica., as well as common public ...
... between the two institutions: Astronomical Institute of Bulgarian Academy of Sciences and Astronomical Observatory in Belgrade, including also research field of double stars. In the framework of this cooperation we have had observations at both NAO Rozhen and AS Vidojevica., as well as common public ...
Collapse: Method 2
... per unit mass onto the protostar of (accumulating) mass M and radius R. Star accumulates gas from envelope through the disc, releases some through jets back into cloud. The jets are thought to be the channels for the extraction of angular momentum. ...
... per unit mass onto the protostar of (accumulating) mass M and radius R. Star accumulates gas from envelope through the disc, releases some through jets back into cloud. The jets are thought to be the channels for the extraction of angular momentum. ...
CHAP
... - Cool stars appear _________ in color with a surface temperature of about 3,200 degrees Celsius. - Warm stars appear _____________ in color with a surface temperature of about 5,500 degrees Celsius. - The hottest stars are ____________ in color and have a surface temperature over 20,000 degrees Cel ...
... - Cool stars appear _________ in color with a surface temperature of about 3,200 degrees Celsius. - Warm stars appear _____________ in color with a surface temperature of about 5,500 degrees Celsius. - The hottest stars are ____________ in color and have a surface temperature over 20,000 degrees Cel ...
answers2006_07_BC
... masses, from its arrival on the main sequence to the end of fusion processes, including an account of the remnant left after fusion stops. Include a sketch of its trajectory on the HR diagram, and where possible relate your description to the features of the HIPPARCOS ...
... masses, from its arrival on the main sequence to the end of fusion processes, including an account of the remnant left after fusion stops. Include a sketch of its trajectory on the HR diagram, and where possible relate your description to the features of the HIPPARCOS ...
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.