ppt - NRAO
... E.g.: Taurus (of course), Orion is much larger than the Orion Nebula, It is not clear if all of Perseus is at the same distance (NGC1333 vs. IC 348), Ophiuchus streamers, etc.. (Note that these regions tend to be heavily obscured, so optical experiments are unlikely to improve significantly the situ ...
... E.g.: Taurus (of course), Orion is much larger than the Orion Nebula, It is not clear if all of Perseus is at the same distance (NGC1333 vs. IC 348), Ophiuchus streamers, etc.. (Note that these regions tend to be heavily obscured, so optical experiments are unlikely to improve significantly the situ ...
Star formation in a galactic outflow
... the spheroidal component of galaxies11,13, and would contribute to the population of highvelocity stars, which could even escape the galaxy13. Such star formation could provide in-situ chemical enrichment of the circumgalactic and intergalactic medium (through supernova explosions of young stars on ...
... the spheroidal component of galaxies11,13, and would contribute to the population of highvelocity stars, which could even escape the galaxy13. Such star formation could provide in-situ chemical enrichment of the circumgalactic and intergalactic medium (through supernova explosions of young stars on ...
The Occurrence and Architecture of Exoplanetary Systems
... Solar System. Isaac Newton realized that the Solar System is more orderly than required by the laws of motion and took this as evidence for God’s hand in creation. Pierre-Simon Laplace was inspired by the same facts to devise a mechanistic theory for the formation of the Solar System. Since then, it ...
... Solar System. Isaac Newton realized that the Solar System is more orderly than required by the laws of motion and took this as evidence for God’s hand in creation. Pierre-Simon Laplace was inspired by the same facts to devise a mechanistic theory for the formation of the Solar System. Since then, it ...
An interesting nebular object in LDN 288
... cavity. The velocity of the dark cloud is ~2.5 km/s and its distance is estimated as (380-990) pc. The object SNO 85 itself is associated with an IRAS point source IRAS 17547-1832, the infrared colors of this source are typical for a non-evolved source embedded in the dense dark cloud. This region i ...
... cavity. The velocity of the dark cloud is ~2.5 km/s and its distance is estimated as (380-990) pc. The object SNO 85 itself is associated with an IRAS point source IRAS 17547-1832, the infrared colors of this source are typical for a non-evolved source embedded in the dense dark cloud. This region i ...
Lec 11 Galileo I Tel..
... Venus should be 40 times as large in one position as in another Venus complete circle = farthest; crescent = closest & largest Mars should be 60 times as large in one as in another Thus: naked eye observations do not confirm Copernicanism Galileo says Copernicus was wise to maintain his vi ...
... Venus should be 40 times as large in one position as in another Venus complete circle = farthest; crescent = closest & largest Mars should be 60 times as large in one as in another Thus: naked eye observations do not confirm Copernicanism Galileo says Copernicus was wise to maintain his vi ...
Riccioli Measures the Stars: Observations of the
... space, or less, to as much as two minutes. The telescope was not then invented which shows that this is an optical delusion, and that they are points of immeasurably small diameter. It was certain to Tycho Brahe, that if the earth did move, the whole motion of the earth in its orbit did not alter th ...
... space, or less, to as much as two minutes. The telescope was not then invented which shows that this is an optical delusion, and that they are points of immeasurably small diameter. It was certain to Tycho Brahe, that if the earth did move, the whole motion of the earth in its orbit did not alter th ...
Document
... • The period depends on the relative angular velocity of Earth and the planet, as seen from the Sun. • The time it takes to complete this period is the synodic period of the planet. ...
... • The period depends on the relative angular velocity of Earth and the planet, as seen from the Sun. • The time it takes to complete this period is the synodic period of the planet. ...
pps - JMMC
... 10 µas astrometry of the galactic center flares – PRIMA can only give partial information on them (1D measurements <=> 1 baseline) – if PRIMA can reach the appropriate limiting magnitude (UTs needed, also because of confusion) and accuracy in 30 min (time scale of flare) – a better instrument for it ...
... 10 µas astrometry of the galactic center flares – PRIMA can only give partial information on them (1D measurements <=> 1 baseline) – if PRIMA can reach the appropriate limiting magnitude (UTs needed, also because of confusion) and accuracy in 30 min (time scale of flare) – a better instrument for it ...
Properties of Wolf-Rayet Stars - Paul Crowther, University of Sheffield
... respect to normal stars by several effects. First, the routine assumption of LTE breaks down for high-temperature stars. Second, the problem of accounting for the effect of millions of spectral lines upon the emergent atmospheric structure and emergent spectrum – known as line blanketing – remains c ...
... respect to normal stars by several effects. First, the routine assumption of LTE breaks down for high-temperature stars. Second, the problem of accounting for the effect of millions of spectral lines upon the emergent atmospheric structure and emergent spectrum – known as line blanketing – remains c ...
PH607lec10-4gal2
... Low Surface brightness galaxies (LSB) Very difficult to detect! Need dedicated surveys Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
... Low Surface brightness galaxies (LSB) Very difficult to detect! Need dedicated surveys Recent automated CCD surveys suggest there may be more LSB galaxies than all the other types of galaxy put together Peculiar Galaxies In particular, interacting galaxies Many cataloged by Arp in 1966 ...
Abstract book
... stellar population has been dramatically disproved. The evidence that most (all?) Galactic globular clusters show multiple stellar populations has been provided us from the extensive photometric and spectroscopic studies carried out in the last decade. In particular, high-quality , high-resolution s ...
... stellar population has been dramatically disproved. The evidence that most (all?) Galactic globular clusters show multiple stellar populations has been provided us from the extensive photometric and spectroscopic studies carried out in the last decade. In particular, high-quality , high-resolution s ...
TWO NEW LONG-PERIOD GIANT PLANETS FROM THE
... Dra B) by the McDonald Observatory planet search. The planet HD95872b has a minimum mass of 4.6MJup and an orbital semimajor axis of 5.2 AU. The giant planet y1 Dra Bb has a minimum mass of 1.5MJup and an orbital semimajor axis of 4.4 AU. Both of these planets qualify as Jupiter analogs. These re ...
... Dra B) by the McDonald Observatory planet search. The planet HD95872b has a minimum mass of 4.6MJup and an orbital semimajor axis of 5.2 AU. The giant planet y1 Dra Bb has a minimum mass of 1.5MJup and an orbital semimajor axis of 4.4 AU. Both of these planets qualify as Jupiter analogs. These re ...
Astronomy Astrophysics First detection of the field star overdensity in the Perseus... &
... Newton Telescope (INT, La Palma). This is the natural photometric system for identifying young stars and obtaining accurate estimates of individual distances and ages. The survey was centered slightly below the plane in order to take into account the warp, and covers Galactic longitudes from ∼ 177 ...
... Newton Telescope (INT, La Palma). This is the natural photometric system for identifying young stars and obtaining accurate estimates of individual distances and ages. The survey was centered slightly below the plane in order to take into account the warp, and covers Galactic longitudes from ∼ 177 ...
Visual Measurements of the Multiple Star
... “known “ double star (a system that has been exten- largest refractor in the world at the time just as the sively studied), and (3) repeating this operation on a 9.5-inch Fraunhofer refractor at Dorpat Observatory “neglected” double star. Neglected double stars are had been in 1824. It was thought t ...
... “known “ double star (a system that has been exten- largest refractor in the world at the time just as the sively studied), and (3) repeating this operation on a 9.5-inch Fraunhofer refractor at Dorpat Observatory “neglected” double star. Neglected double stars are had been in 1824. It was thought t ...
The Milky Way: Spiral galaxies:
... absorption. Note that spin flips are classically “forbidden”: on average, a single hydrogen atom will take 107 years to decay! The probability of an absorption is even rarer. •! HI gas mass is directly proportional to 21 cm line intensity •! HI disk is much more extended than optical light, typicall ...
... absorption. Note that spin flips are classically “forbidden”: on average, a single hydrogen atom will take 107 years to decay! The probability of an absorption is even rarer. •! HI gas mass is directly proportional to 21 cm line intensity •! HI disk is much more extended than optical light, typicall ...
The Formation of Planetary Systems
... gas clouds, fallen meteorites, and Earth’s Moon, as well as of the various planets observed with ground-based telescopes and planetary space probes. Ironically, studies of Earth itself do not help much, because information about our planet’s early stages eroded away long ago. Meteorites and comets p ...
... gas clouds, fallen meteorites, and Earth’s Moon, as well as of the various planets observed with ground-based telescopes and planetary space probes. Ironically, studies of Earth itself do not help much, because information about our planet’s early stages eroded away long ago. Meteorites and comets p ...
the article as PDF - Project VS
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
... VV Cephei eclipsing binary systems offer the most detailed method of studying mass loss from cool supergiant stars. The long-period of VV Cephei gives it a unique place among eclipsing binaries, but 20.4 years between eclipses make it really hard for scientists to study the system. Such a long inter ...
Astro Physics Notes and Study Guide 2015-17
... As explained by the Doppler Effect, as a moving source of light moves away from the receiver the light will “appear” to have a longer wavelength its actual. This will cause the received wavelengths to be shifted towards the side of red, or, red shifted. Because the light received from distant galaxi ...
... As explained by the Doppler Effect, as a moving source of light moves away from the receiver the light will “appear” to have a longer wavelength its actual. This will cause the received wavelengths to be shifted towards the side of red, or, red shifted. Because the light received from distant galaxi ...
Dynamical Mass Measurements of Pre-Main
... There are now 23 dynamical mass measurements for pre-main-sequence (PMS) stars of less than 2 M , with most of the measured stars having masses greater than 0.5 M . The masses of two PMS brown dwarfs have also been precisely measured. The most important application of these dynamical mass measuremen ...
... There are now 23 dynamical mass measurements for pre-main-sequence (PMS) stars of less than 2 M , with most of the measured stars having masses greater than 0.5 M . The masses of two PMS brown dwarfs have also been precisely measured. The most important application of these dynamical mass measuremen ...
ASTRONOMY 113 Laboratory Lab 5: Spectral Classification of the
... Subaru to the Japanese; you might recognize the pattern of the brightest stars as the logo on Subaru automobiles.) The cluster also contains several hundred much fainter stars. Since the Pleiades are close to the Sun (≈120 pc distant), even these fainter stars are accessible to Earth-based telescope ...
... Subaru to the Japanese; you might recognize the pattern of the brightest stars as the logo on Subaru automobiles.) The cluster also contains several hundred much fainter stars. Since the Pleiades are close to the Sun (≈120 pc distant), even these fainter stars are accessible to Earth-based telescope ...
New Double Stars from Asteroidal Occultations, 1971 - 2008
... routine. For the last few years almost 200 occultation events per year have been observed around the world. In the early days of asteroidal occultations, most observations were made visually. For the last several years the great majority of observations are made using video cameras with a time signa ...
... routine. For the last few years almost 200 occultation events per year have been observed around the world. In the early days of asteroidal occultations, most observations were made visually. For the last several years the great majority of observations are made using video cameras with a time signa ...
ASTR1102-002 Potentially useful facts and mathematical relations
... a. The officer measures your car’s “proper motion.” b. The officer relies on a “Doppler shift” measurement. c. The officer measures the apparent brightness of your headlights. d. The officer measures the color of your car. ANS: ...
... a. The officer measures your car’s “proper motion.” b. The officer relies on a “Doppler shift” measurement. c. The officer measures the apparent brightness of your headlights. d. The officer measures the color of your car. ANS: ...
Observational properties of stars
... he made many observations of its position and was able to show that it was a distant object. Estimated V = -4. Thanks to the observations of Tycho and others there is enough data to get a well defined light curve for this object and it is thought to be a type Ia object. Current observations show a w ...
... he made many observations of its position and was able to show that it was a distant object. Estimated V = -4. Thanks to the observations of Tycho and others there is enough data to get a well defined light curve for this object and it is thought to be a type Ia object. Current observations show a w ...
a wide-field survey for variable stars
... 4.2.2 Seeing conditions at Mt. Holomon. . . . . . . . . . . . . . . . . . . . . . . 4.2.3 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.4 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.5 Overall Seeing and Isoplanatic angle measu ...
... 4.2.2 Seeing conditions at Mt. Holomon. . . . . . . . . . . . . . . . . . . . . . . 4.2.3 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.4 Seeing conditions at Mt. Holomon (cont.). . . . . . . . . . . . . . . . . . . 4.2.5 Overall Seeing and Isoplanatic angle measu ...