Astro 6590: Galaxies and the Universe Astro
... and about 10X as much by mass of dark matter. The stars and gas are about 70% hydrogen by mass and 25% helium, the rest being heavier elements (called "metals"). • Typical scales are: masses between 106 to 1012 M (1 solar mass is 2 x 1030 kg), and sizes ~ 1-100 kpc (1 pc = 3.1 x 1016 m). Galaxies t ...
... and about 10X as much by mass of dark matter. The stars and gas are about 70% hydrogen by mass and 25% helium, the rest being heavier elements (called "metals"). • Typical scales are: masses between 106 to 1012 M (1 solar mass is 2 x 1030 kg), and sizes ~ 1-100 kpc (1 pc = 3.1 x 1016 m). Galaxies t ...
File - Mr. Pelton Science
... times the mass of our Sun. • Dwarf ellipticals = 1 million x Sun’s mass • Large spirals = 100 billion x Sun’s mass • Giant ellipticals = 1 trillion x Sun’s mass ...
... times the mass of our Sun. • Dwarf ellipticals = 1 million x Sun’s mass • Large spirals = 100 billion x Sun’s mass • Giant ellipticals = 1 trillion x Sun’s mass ...
Orion the Hunter
... Hunter. Its brightest stars form one of the best known celestial shapes, which is visible even from cities. The plane of the Milky Way clips the northeast corner of the constellation and manifests itself as a featureless, hazy band through the neighboring constellations of Gemini and Monoceros. Or ...
... Hunter. Its brightest stars form one of the best known celestial shapes, which is visible even from cities. The plane of the Milky Way clips the northeast corner of the constellation and manifests itself as a featureless, hazy band through the neighboring constellations of Gemini and Monoceros. Or ...
1/20/09 301 Physics Chapter 12 The Family of Stars Triangulation
... also differ in average density, not just diameter • Typical density of main-sequence star is 1 g/cm3, while for a giant it is 10-6 g/cm3 ...
... also differ in average density, not just diameter • Typical density of main-sequence star is 1 g/cm3, while for a giant it is 10-6 g/cm3 ...
Star formation and internal kinematics of irregular galaxies
... single feature they display. Besides absent spiral structure, Irregulars commonly have a patchy light distribution and frequently lack a centre of (rotational) symmetry. A definable nucleus is rare, and they lack bulges. Hubble’s initial Irregular designation encompassed all galaxies ‘later’ than Sc ...
... single feature they display. Besides absent spiral structure, Irregulars commonly have a patchy light distribution and frequently lack a centre of (rotational) symmetry. A definable nucleus is rare, and they lack bulges. Hubble’s initial Irregular designation encompassed all galaxies ‘later’ than Sc ...
1 Introduction - High Point University
... Table 1: Example distance moduli calculated using Equation (1). One of the best known distance indicators are RR Lyrae Stars. These are pulsating variable stars—stars that change in brightness over time because they are periodically growing larger and smaller much like breathing. These stars pulsate ...
... Table 1: Example distance moduli calculated using Equation (1). One of the best known distance indicators are RR Lyrae Stars. These are pulsating variable stars—stars that change in brightness over time because they are periodically growing larger and smaller much like breathing. These stars pulsate ...
Ch13_Lecture - Chemistry at Winthrop University
... Temperature’s Effect on Spectra • Consequently, absorption lines will be present or absent depending on the presence or absence of an electron at the right energy level and this is very much dependent on temperature • Adjusting for temperature, a star’s composition can be found – interestingly, vir ...
... Temperature’s Effect on Spectra • Consequently, absorption lines will be present or absent depending on the presence or absence of an electron at the right energy level and this is very much dependent on temperature • Adjusting for temperature, a star’s composition can be found – interestingly, vir ...
SMMP_BISANA - Infinity and Beyond
... Despite the many mentions of the stars in Greek and early Roman texts, by far the most thorough star catalogue from ancient times belongs to the Roman Ptolemy of Alexandria, who grouped 1022 stars into 48 constellations during the 2nd century A.D. Although Ptolemy's Almagest does not include the co ...
... Despite the many mentions of the stars in Greek and early Roman texts, by far the most thorough star catalogue from ancient times belongs to the Roman Ptolemy of Alexandria, who grouped 1022 stars into 48 constellations during the 2nd century A.D. Although Ptolemy's Almagest does not include the co ...
EarthComm_c1s9
... understand when and how these events occur. Not only are these nebulae interesting, but they also show scientists what the fate of our solar system will be billions of years from now. What would happen if there were a supernova explosion in our stellar neighborhood some time in the future? Depending ...
... understand when and how these events occur. Not only are these nebulae interesting, but they also show scientists what the fate of our solar system will be billions of years from now. What would happen if there were a supernova explosion in our stellar neighborhood some time in the future? Depending ...
The Great Nebula in Orion
... under the reasonable assumption that the Orion Nebula is a typical star-forming region, it presents astronomers with a valuable laboratory for observing star and planetary system formation in a controlled—or at least understandable—setting. The exact correspondences to the situation of the early Sol ...
... under the reasonable assumption that the Orion Nebula is a typical star-forming region, it presents astronomers with a valuable laboratory for observing star and planetary system formation in a controlled—or at least understandable—setting. The exact correspondences to the situation of the early Sol ...
ph507lecnote06
... Distance: Distance is an easy concept to understand: it is just a length in some units such as in feet, km, light years, parsecs etc. It has been excrutiatingly difficult to measure astronomical distances until this century. Unfortunately most stars are so far away that it is impossible to directly ...
... Distance: Distance is an easy concept to understand: it is just a length in some units such as in feet, km, light years, parsecs etc. It has been excrutiatingly difficult to measure astronomical distances until this century. Unfortunately most stars are so far away that it is impossible to directly ...
r*=13.6 km MPA1 EOS
... arXiv:1106.3131 Denis A. Leahy, Sharon M. Morsink and Yi Chou The accreting millisecond pulsar XTE J1807-294 is studied through a pulse-shape modeling analysis. The model includes blackbody and Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation ...
... arXiv:1106.3131 Denis A. Leahy, Sharon M. Morsink and Yi Chou The accreting millisecond pulsar XTE J1807-294 is studied through a pulse-shape modeling analysis. The model includes blackbody and Comptonized emission from the one visible hot spot and makes use of the Oblate Schwarzschild approximation ...
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 ...
don_lamb - New Views of the Universe
... First observation of optical afterglow of short GRB First secure identification of host galaxy First secure measurement of distance to short GRB First determination of where in host galaxy burst occurred ...
... First observation of optical afterglow of short GRB First secure identification of host galaxy First secure measurement of distance to short GRB First determination of where in host galaxy burst occurred ...
Tutorial: Luminosity
... Luminosity (brightness) of a Star Absolute Brightness: The luminosity per square meter emitted by the star at it’s surface. This is an intrinsic property of the star. Apparent Brightness: The power per square meter as measured at a distance d from the star. If the observation of brightness of the s ...
... Luminosity (brightness) of a Star Absolute Brightness: The luminosity per square meter emitted by the star at it’s surface. This is an intrinsic property of the star. Apparent Brightness: The power per square meter as measured at a distance d from the star. If the observation of brightness of the s ...
The Dynamics of the Galaxies in the Local Group
... 2.5 million light years away Similar to Milky Way (shape, size, mass) One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
... 2.5 million light years away Similar to Milky Way (shape, size, mass) One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
Chapter14(4-7-11)
... Stellar Populations • Turns out that there are two types of stars in the Galaxy – Population I: Relatively young. Similar to the Sun. Tend to be in the galactic disk. Richer in heavy elements – Population II: Few heavy elements, very old (12-14 billion years), tend to be in the center of the galax ...
... Stellar Populations • Turns out that there are two types of stars in the Galaxy – Population I: Relatively young. Similar to the Sun. Tend to be in the galactic disk. Richer in heavy elements – Population II: Few heavy elements, very old (12-14 billion years), tend to be in the center of the galax ...
the magellanic clouds newsletter - Keele University Astrophysics
... We present the Planck catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with the Early Release Compact Source Catalogue (ERCS ...
... We present the Planck catalogue of Galactic Cold Clumps (PGCC), an all-sky catalogue of Galactic cold clump candidates detected by Planck. This catalogue is the full version of the Early Cold Core (ECC) catalogue, which was made available in 2011 with the Early Release Compact Source Catalogue (ERCS ...
The Stars: Distance, Luminosity, Size
... The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a mass sequence! ...
... The more massive a Main Sequence star is, the hotter (bluer), and more luminous. The Main Sequence is a mass sequence! ...
Characteristics of Our Galaxy
... variables (useful for judging distances), pre-main sequence stars, T-Tauri stars, Herbigharo objects, and even some A stars can be found in the arms. These stars are very metal rich and have highly circular orbits, although they comprise likely less than one percent of Milky Way stars. Young thin d ...
... variables (useful for judging distances), pre-main sequence stars, T-Tauri stars, Herbigharo objects, and even some A stars can be found in the arms. These stars are very metal rich and have highly circular orbits, although they comprise likely less than one percent of Milky Way stars. Young thin d ...
Results from the search for tidal disruption flares in the GALEX Deep
... emission requires excitation by a persistent Seyfert nucleus. ...
... emission requires excitation by a persistent Seyfert nucleus. ...
Star
... • When a star explosively brightens, it is called a nova (new star). Excessively large explosions are called supernovas. • During the outburst, the outer layer of the star is ejected at high speed. • After reaching maximum brightness in a few days, the nova slowly returns in a year or so to its orig ...
... • When a star explosively brightens, it is called a nova (new star). Excessively large explosions are called supernovas. • During the outburst, the outer layer of the star is ejected at high speed. • After reaching maximum brightness in a few days, the nova slowly returns in a year or so to its orig ...
The Milky Way Galaxy is Heading for a Major Cosmic Collision
... 2.5 million light years away Similar to Milky Way (shape, size, mass) One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
... 2.5 million light years away Similar to Milky Way (shape, size, mass) One of few galaxies that can be seen with naked eye First described by astronomers >1000 years ago ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.