Module 11.1.1: Galaxies: Morphology and the Hubble Sequence
... basic constituents of the universe, obviously distinct units when you look at the sky. And the reason for that is that they are over-‐dense by a factor of 1,000 relative to the extrapolation of ...
... basic constituents of the universe, obviously distinct units when you look at the sky. And the reason for that is that they are over-‐dense by a factor of 1,000 relative to the extrapolation of ...
Laboratory A
... A. The Naval Prototype Optical Interferometer (NPOI) is located on a piece of property that is roughly a square that is 375 m by 375 m. 1. What is the length of property in kilometers? 0.375 km 2. What is the length of the property in centimeters? ...
... A. The Naval Prototype Optical Interferometer (NPOI) is located on a piece of property that is roughly a square that is 375 m by 375 m. 1. What is the length of property in kilometers? 0.375 km 2. What is the length of the property in centimeters? ...
Barium and europium abundances in cool dwarf stars and
... Ba abundance consist of 88% and 12%, respectively, according to Cameron (1982), 87% and 13% according to Käppeler et al. (1989), and 81% and 19% according to the most recent data of Arlandini et al. (1999). The solar europium mostly originated from the r-process: 91% according to Cameron (1982) and ...
... Ba abundance consist of 88% and 12%, respectively, according to Cameron (1982), 87% and 13% according to Käppeler et al. (1989), and 81% and 19% according to the most recent data of Arlandini et al. (1999). The solar europium mostly originated from the r-process: 91% according to Cameron (1982) and ...
On the asymmetry of the distribution of observable comets induced
... we used the spherically symmetric cloud with Duncan et al. (1987) distributions of the cometary semimajor axis and the eccentricity and assumed a uniform distribution of the mean anomaly of comets. Any errors introduced by numerical reconstruction of the semimajor axis and eccentricity distributions ...
... we used the spherically symmetric cloud with Duncan et al. (1987) distributions of the cometary semimajor axis and the eccentricity and assumed a uniform distribution of the mean anomaly of comets. Any errors introduced by numerical reconstruction of the semimajor axis and eccentricity distributions ...
Lecture 3 - University of Washington
... instabilities, stochastic spirals, and the shocks patterns that can arise in shearing gas disks when forced by bars. There are (at least) two popular theories, one of which is more commonly used to explain grand design spirals, the other for ...
... instabilities, stochastic spirals, and the shocks patterns that can arise in shearing gas disks when forced by bars. There are (at least) two popular theories, one of which is more commonly used to explain grand design spirals, the other for ...
ASTRONOMY AND ASTROPHYSICS Barium and europium
... halo stars are of the r-process origin. Much observational efforts were invested in testing this idea. For extremely metalpoor stars with metallicities [Fe/H] ≤ −2.4 McWilliam (1998) has derived an average [Eu/Ba] = 0.69, consistent with pure rprocess nucleosynthesis provided that the data of Arland ...
... halo stars are of the r-process origin. Much observational efforts were invested in testing this idea. For extremely metalpoor stars with metallicities [Fe/H] ≤ −2.4 McWilliam (1998) has derived an average [Eu/Ba] = 0.69, consistent with pure rprocess nucleosynthesis provided that the data of Arland ...
Imaging the Universe Robert Mutel A Laboratory Manual for Introductory Astronomy
... student. The reason is simple: the student looks forward to viewing and photographing celestial objects firsthand, possibly with a quality telescope and camera. Unfortunately, the traditional photographic camera techniques and manually operated telescopes used in undergraduate labs have been too cum ...
... student. The reason is simple: the student looks forward to viewing and photographing celestial objects firsthand, possibly with a quality telescope and camera. Unfortunately, the traditional photographic camera techniques and manually operated telescopes used in undergraduate labs have been too cum ...
Physics 1114OL - Normandale Community College
... eyepiece, objective, chromatic aberration, reflecting and refracting telescopes, Schmidt-Cassegrain reflector, space telescope, focal length, radio telescope, radio interferometer, observatory. Learning Outcomes: 1. State the speed of light and describe how it was first measured. 2. Explain the dual ...
... eyepiece, objective, chromatic aberration, reflecting and refracting telescopes, Schmidt-Cassegrain reflector, space telescope, focal length, radio telescope, radio interferometer, observatory. Learning Outcomes: 1. State the speed of light and describe how it was first measured. 2. Explain the dual ...
Stars: HR Diagaram Stellar Evolution Astronomy 1 — Elementary Astronomy LA Mission College
... Independently in 1913 American astronomer Henry Norris Russell plotted spectral class against absolute magnitude ...
... Independently in 1913 American astronomer Henry Norris Russell plotted spectral class against absolute magnitude ...
Mapping of the extinction in giant molecular clouds using optical star
... spectrum of interstellar clouds can also be understood assuming a fractal structure (Elmegreen & Falgarone, 1996). Larson (1995) went further, showing that the Taurus cloud also presents a fractal structure in the distribution of its young stellar objects. Blitz and Williams (1997) claim, however, t ...
... spectrum of interstellar clouds can also be understood assuming a fractal structure (Elmegreen & Falgarone, 1996). Larson (1995) went further, showing that the Taurus cloud also presents a fractal structure in the distribution of its young stellar objects. Blitz and Williams (1997) claim, however, t ...
Series Telescopes INSTRUCTION MANUAL
... light-gathering characteristics you can take a serious interest in deep space astronomy even on a modest budget. Newtonian Reflector telescopes do require more care and maintenance because the primary mirror is exposed to air and dust. However, this small drawback does not hamper this type of telesc ...
... light-gathering characteristics you can take a serious interest in deep space astronomy even on a modest budget. Newtonian Reflector telescopes do require more care and maintenance because the primary mirror is exposed to air and dust. However, this small drawback does not hamper this type of telesc ...
MEarth
... 2. Transits from the habitable zones of M dwarfs happen much more frequently. At 0.074 AU from the M5, a planet would transit once every 14.5 days, compared to 1 year for the Earth-Sun system. This is critical for detectability, as dramatically less observational time is required to achieve a transi ...
... 2. Transits from the habitable zones of M dwarfs happen much more frequently. At 0.074 AU from the M5, a planet would transit once every 14.5 days, compared to 1 year for the Earth-Sun system. This is critical for detectability, as dramatically less observational time is required to achieve a transi ...
Galaxy formation in the Planck cosmology - II. Star
... to that described in this paper, i.e. the distribution of formation times of all the stars that make up the galaxy.2 Measures of the SFH of the main galactic component can only be inferred statistically by observing populations of galaxies at different redshifts and making some assumptions about mer ...
... to that described in this paper, i.e. the distribution of formation times of all the stars that make up the galaxy.2 Measures of the SFH of the main galactic component can only be inferred statistically by observing populations of galaxies at different redshifts and making some assumptions about mer ...
Betelgeuse - TeacherWeb
... This protosun was about 10 to 50,000 K. After thousands of years Betelgeuse turned a yellow color, about 5,500 K. Now it is between the yellow and bright red stage. ...
... This protosun was about 10 to 50,000 K. After thousands of years Betelgeuse turned a yellow color, about 5,500 K. Now it is between the yellow and bright red stage. ...
Galaxy Spiral Arms
... rotation of a "rigid toy pinwheel"? The critical point is that the local rotational velocity of any point on such a pinwheel is directly proportional to radius? Larger radius should therefore imply proportionately larger revolutionary velocity, at least in the Spiral Arms, in our Galaxy. This reason ...
... rotation of a "rigid toy pinwheel"? The critical point is that the local rotational velocity of any point on such a pinwheel is directly proportional to radius? Larger radius should therefore imply proportionately larger revolutionary velocity, at least in the Spiral Arms, in our Galaxy. This reason ...
![Neutral material around the B[e] supergiant star LHA 115](http://s1.studyres.com/store/data/015508749_1-459b4c864ff7fdb1bc1eff2b9c6df4c4-300x300.png)
Neutral material around the B[e] supergiant star LHA 115
... to Ci and Ni. The group of emission lines with the strong central absorption contains by far the largest number of lines. We could identify more than 230 lines, most of them belonging to transitions of Feii, Crii, and Tiii. But few lines from other elements like Mnii, Mgi, Caii, Siii, and Fei were a ...
... to Ci and Ni. The group of emission lines with the strong central absorption contains by far the largest number of lines. We could identify more than 230 lines, most of them belonging to transitions of Feii, Crii, and Tiii. But few lines from other elements like Mnii, Mgi, Caii, Siii, and Fei were a ...
Planetary Nebula
... Planetary Nebula OH231.8+4.2 Rotten Egg Nebula The object shown in this Hubble image is a remarkable example of a star going through death throes just as it dramatically transforms itself from a normal red giant star into a planetary nebula. This process happens so quickly that such objects are qui ...
... Planetary Nebula OH231.8+4.2 Rotten Egg Nebula The object shown in this Hubble image is a remarkable example of a star going through death throes just as it dramatically transforms itself from a normal red giant star into a planetary nebula. This process happens so quickly that such objects are qui ...
Characterization and Subtraction of Well
... time dependence of the PSF. By characterizing this anomaly ...
... time dependence of the PSF. By characterizing this anomaly ...
A physical interpretation of the `red Sirius` anomaly
... The crucial test of this hypothesis is the degree of dimming of the light of Sirius that accompanies sufficient reddening (Whittet 1977). The optical properties of interstellar dust are rather welldetermined, so a quantitative evaluation can be made. Fig. 1 plots V magnitude against B 2 V colour, ...
... The crucial test of this hypothesis is the degree of dimming of the light of Sirius that accompanies sufficient reddening (Whittet 1977). The optical properties of interstellar dust are rather welldetermined, so a quantitative evaluation can be made. Fig. 1 plots V magnitude against B 2 V colour, ...
Spectral Line VLBI - Australia Telescope National Facility
... Properties of a Maser • The maser components are extremely small (mas) and narrow (fractions of a km/s) Measure position and velocity of components with great accuracy ...
... Properties of a Maser • The maser components are extremely small (mas) and narrow (fractions of a km/s) Measure position and velocity of components with great accuracy ...
1e 1048.1−5937, xte j1810−197 and 4u 0142+61
... line center and black body temperatures) are given in Table 1. What is remarkable is that in each case, the detected emission feature is at an energy of ≈13 keV. In the magnetar model the common interpretation is that these lines are proton-cyclotron in origin, implying a magnetic field of ≈2 × 1015 ...
... line center and black body temperatures) are given in Table 1. What is remarkable is that in each case, the detected emission feature is at an energy of ≈13 keV. In the magnetar model the common interpretation is that these lines are proton-cyclotron in origin, implying a magnetic field of ≈2 × 1015 ...
Discovery of an Unusual Optical Transient with the Hubble Space
... For a galactic source, the slope of the red continuum gives a lower limit blackbody temperature of 6500 K. The absorption features at 4320 and 4870 Å are consistent with Hγ (4341 Å) and Hβ (4861 Å) respectively, including uncertainty in the shape of the underlying continuum. However, there is no ...
... For a galactic source, the slope of the red continuum gives a lower limit blackbody temperature of 6500 K. The absorption features at 4320 and 4870 Å are consistent with Hγ (4341 Å) and Hβ (4861 Å) respectively, including uncertainty in the shape of the underlying continuum. However, there is no ...
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.