The Milky Way and Its Neighbors
... 1)Mapping HI regions with radio observations - 21 cm line measurements 2)Mapping HII regions via Hα emission lines - HII regions trace active star formation Old data showed that there were 4 arms New data from Spitzer indicates that there are only 2 major spiral arms: -Scutum and Perseus Arms ...
... 1)Mapping HI regions with radio observations - 21 cm line measurements 2)Mapping HII regions via Hα emission lines - HII regions trace active star formation Old data showed that there were 4 arms New data from Spitzer indicates that there are only 2 major spiral arms: -Scutum and Perseus Arms ...
Today in Astronomy 142
... Beyond the Chandrasekhar mass: neutron stars ! The maximum mass calculation involves general relativity and an equation of state that includes the strong interaction. The maximum mass is about 2.2 M⊙; it could not possibly be > 3 M⊙. ! Neutron stars generally have very large magnetic fields (conser ...
... Beyond the Chandrasekhar mass: neutron stars ! The maximum mass calculation involves general relativity and an equation of state that includes the strong interaction. The maximum mass is about 2.2 M⊙; it could not possibly be > 3 M⊙. ! Neutron stars generally have very large magnetic fields (conser ...
Define the following terms in the space provided
... A) At what altitude would Polaris appear above the northern horizon? The altitude of Polaris (NCP, really) just equals your latitude. Thus, Polaris would appear +26 degrees above the northern horizon. B) Would a star with a declination of +63 degrees be circumpolar? Explain. Since Polaris (the NCP, ...
... A) At what altitude would Polaris appear above the northern horizon? The altitude of Polaris (NCP, really) just equals your latitude. Thus, Polaris would appear +26 degrees above the northern horizon. B) Would a star with a declination of +63 degrees be circumpolar? Explain. Since Polaris (the NCP, ...
6 March 2013 Exoplanets and Where to Find Them Professor
... imaging (eg with adaptive optics) it is possible to separate the light from the planet from that of the host. This technique was used to obtain the first image of a multiplanet system in 2007. Four planets are seen to orbit HR 8799, an ordinary star fairly similar to our Sun and some 130 light-years ...
... imaging (eg with adaptive optics) it is possible to separate the light from the planet from that of the host. This technique was used to obtain the first image of a multiplanet system in 2007. Four planets are seen to orbit HR 8799, an ordinary star fairly similar to our Sun and some 130 light-years ...
Age Estimates of Globular Clusters in the Milky Way
... nique yields values for Mv(RR) The key to the success of this that are larger (i.e., fainter) than approach involves the accuracy in the other distance techniques. determining the intrinsic lumiWhen statistical parallax results nosity of the standard candle. are included in the weighted This can be ...
... nique yields values for Mv(RR) The key to the success of this that are larger (i.e., fainter) than approach involves the accuracy in the other distance techniques. determining the intrinsic lumiWhen statistical parallax results nosity of the standard candle. are included in the weighted This can be ...
ppt
... The parametric methods work only when there are two proper-motion groups (cluster and field stars) distributed according to normal bivariate function. The most common departure from these assumptions is the non-Gaussian shape of the field proper-motion distribution (Sun’s peculiar motion + Galactic ...
... The parametric methods work only when there are two proper-motion groups (cluster and field stars) distributed according to normal bivariate function. The most common departure from these assumptions is the non-Gaussian shape of the field proper-motion distribution (Sun’s peculiar motion + Galactic ...
Astronomy Report Southern Cross Authors Maria Constanza Pavez
... ceramic) it is demonstrated that this constellation was important for people’s life and even today their pilgrimage (on march 3rd) is the continuity of the veneration towards the Southern Cross in the antiquity. In India there existed a constellation called SULA (Beam of Crucifixion). It was confir ...
... ceramic) it is demonstrated that this constellation was important for people’s life and even today their pilgrimage (on march 3rd) is the continuity of the veneration towards the Southern Cross in the antiquity. In India there existed a constellation called SULA (Beam of Crucifixion). It was confir ...
Dark Matter -24-------------------------------~-----------R-E-S-O-N-A-N-C
... (i) It doesn't exist; the law of gravitation must be modified so that the stars are all there is to a galaxy. (ii) Dark matter exists, but consists entirely of ord~nary matter - Jupiter-like objects called broum dwarfs that are not massive enough to start the stellar energy-generating process of nuc ...
... (i) It doesn't exist; the law of gravitation must be modified so that the stars are all there is to a galaxy. (ii) Dark matter exists, but consists entirely of ord~nary matter - Jupiter-like objects called broum dwarfs that are not massive enough to start the stellar energy-generating process of nuc ...
CHAPTER 29 STARS 240 points
... spectral lines. Spectral lines help scientists determine the speed of a star’s motion. Motion between the source of light and the observer cause the spectral lines to shift in wavelength. Depending on whether the wavelength is shorter or longer, the observer can determine if the star is moving towar ...
... spectral lines. Spectral lines help scientists determine the speed of a star’s motion. Motion between the source of light and the observer cause the spectral lines to shift in wavelength. Depending on whether the wavelength is shorter or longer, the observer can determine if the star is moving towar ...
Astronomy Talk July 2016 - Unitarian Universalist Church of
... shore and out over the sea, and we see that we’re surrounded by mystery. ...
... shore and out over the sea, and we see that we’re surrounded by mystery. ...
Imaging extrasolar planets
... down into their atmospheres and infer their chemical compoThese theoretical models become increasingly uncertain at sition, temperatures, pressures, and cloud properties by very young ages because the exact initial conditions of how studying their brightness at different wavelengths. This spring the ...
... down into their atmospheres and infer their chemical compoThese theoretical models become increasingly uncertain at sition, temperatures, pressures, and cloud properties by very young ages because the exact initial conditions of how studying their brightness at different wavelengths. This spring the ...
PH607lec12-5gal3
... Since m Vrot2 / R = G M m / R2 , the mass M is proportional to Vrot2 R . Therefore L is proportional to Vrot2 R. The observed flux or Luminosity L of a galaxy can be determined ...
... Since m Vrot2 / R = G M m / R2 , the mass M is proportional to Vrot2 R . Therefore L is proportional to Vrot2 R. The observed flux or Luminosity L of a galaxy can be determined ...
Anatomy of the Sun
... A Useful Fingerprint Each particular type of nucleus will absorb light only with certain preferred wavelengths, leaving gaps in the spectrum. It is as if each element has a distinctive fingerprint that it leaves on light that passes through it. This is very, very useful as it allows astronomers to ...
... A Useful Fingerprint Each particular type of nucleus will absorb light only with certain preferred wavelengths, leaving gaps in the spectrum. It is as if each element has a distinctive fingerprint that it leaves on light that passes through it. This is very, very useful as it allows astronomers to ...
Anatomy of the Sun - Lincoln-Sudbury Regional High School
... A Useful Fingerprint Each particular type of nucleus will absorb light only with certain preferred wavelengths, leaving gaps in the spectrum. It is as if each element has a distinctive fingerprint that it leaves on light that passes through it. This is very, very useful as it allows astronomers to ...
... A Useful Fingerprint Each particular type of nucleus will absorb light only with certain preferred wavelengths, leaving gaps in the spectrum. It is as if each element has a distinctive fingerprint that it leaves on light that passes through it. This is very, very useful as it allows astronomers to ...
Astro 7B – Solution Set 7 1 A Star is Born
... Consider the gravitational collapse of a cloud of gas and dust in the interstellar medium. Assume the temperature of the cloud is such that the cloud is initially marginally Jeans-unstable. The gas consists predominantly of molecular hydrogen. As the cloud collapses inward, its density increases. In ...
... Consider the gravitational collapse of a cloud of gas and dust in the interstellar medium. Assume the temperature of the cloud is such that the cloud is initially marginally Jeans-unstable. The gas consists predominantly of molecular hydrogen. As the cloud collapses inward, its density increases. In ...
6 Minute English
... But once it reaches the sun’s surface – the photosphere – it can escape. In fact, it takes only eight minutes for light energy from the sun to reach the Earth. Scientists these days are able to see the photosphere in fantastic detail using powerful telescopes. Rob Though Galileo observed dark spots ...
... But once it reaches the sun’s surface – the photosphere – it can escape. In fact, it takes only eight minutes for light energy from the sun to reach the Earth. Scientists these days are able to see the photosphere in fantastic detail using powerful telescopes. Rob Though Galileo observed dark spots ...
Ionization structure of an HII region
... 6. Check for stability of ξ (This is not necessary for the first radius, since τ = 0 for all frequencies. If ξ is not accurate enough, recalulate the mean intensities, and go back to Step 3 7. Check whether the outer edge has been reached, either by sufficiently low ξ or sufficiently large τ . If t ...
... 6. Check for stability of ξ (This is not necessary for the first radius, since τ = 0 for all frequencies. If ξ is not accurate enough, recalulate the mean intensities, and go back to Step 3 7. Check whether the outer edge has been reached, either by sufficiently low ξ or sufficiently large τ . If t ...
A Collection of Curricula for the STARLAB Deep Sky Objects
... Nebulae absorb light from nearby stars and radiate it back into space. Most nebulae glow red, the color of hydrogen gas. The brightest nebula is the Orion Nebula (see slide #60) which can be seen with the unaided eye in a dark sky. Nebulae are very important in astronomy because they are the key to ...
... Nebulae absorb light from nearby stars and radiate it back into space. Most nebulae glow red, the color of hydrogen gas. The brightest nebula is the Orion Nebula (see slide #60) which can be seen with the unaided eye in a dark sky. Nebulae are very important in astronomy because they are the key to ...
Exploration of the Milky Way and Nearby galaxies
... To observe diffusion in action is to compare the elemental abundances for heavy elements near the Fe-peak of MS versus red giant and sub-giant stars in metalpoor globular clusters ...
... To observe diffusion in action is to compare the elemental abundances for heavy elements near the Fe-peak of MS versus red giant and sub-giant stars in metalpoor globular clusters ...
Presidential
... For the OSD model, {g_00} is necessarily Unity. We now allow it to be non-zero, this amounts to introducing small non-zero tangential pressures (with M=M_0 only). ...
... For the OSD model, {g_00} is necessarily Unity. We now allow it to be non-zero, this amounts to introducing small non-zero tangential pressures (with M=M_0 only). ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.