Collapse of an unstable Neutron Star to a Black Hole
... star merger process a new supramassive or hypermassive neutron star is formed, which could be stable for longer times or collapse almost immediately to a black hole. During this process a short gamma ray burst is emitted, releasing in less than one second the energy emitted by our Galaxy over one ye ...
... star merger process a new supramassive or hypermassive neutron star is formed, which could be stable for longer times or collapse almost immediately to a black hole. During this process a short gamma ray burst is emitted, releasing in less than one second the energy emitted by our Galaxy over one ye ...
upperMS - CWRU Astronomy
... OBC stars are more difficult to “make” than OBN stars. Mass transfer in a binary can only lead to OBC by stripping part of the carbon-oxygen core of the primary. Carbon enhancement most likely from supernovae. Early forming massive stars could go supernova and enrich nearby protostars. Mass loss an ...
... OBC stars are more difficult to “make” than OBN stars. Mass transfer in a binary can only lead to OBC by stripping part of the carbon-oxygen core of the primary. Carbon enhancement most likely from supernovae. Early forming massive stars could go supernova and enrich nearby protostars. Mass loss an ...
Galaxy Questions Info
... (pinwheel-shaped) arms, a bulge at its center, and a halo. Spiral galaxies have a variety of shapes, and they are classified according to the size of the bulge and the tightness and appearance of the arms. The spiral arms, which wrap around the bulge, contain many young blue stars and lots of gas an ...
... (pinwheel-shaped) arms, a bulge at its center, and a halo. Spiral galaxies have a variety of shapes, and they are classified according to the size of the bulge and the tightness and appearance of the arms. The spiral arms, which wrap around the bulge, contain many young blue stars and lots of gas an ...
NearInfrared
... emitting source. Since dust is formed during the late stages of stellar evolution regions such as nuclei of galaxies, where many generations of stars are actively forming or have formed, evolved and “died” are often enshrouded by dust which absorbs light. This extinction of light though, depends on ...
... emitting source. Since dust is formed during the late stages of stellar evolution regions such as nuclei of galaxies, where many generations of stars are actively forming or have formed, evolved and “died” are often enshrouded by dust which absorbs light. This extinction of light though, depends on ...
7 November 2012 X-ray Astrophysics
... violent and dramatic regions of our Universe. Synchrotron Emission X-rays can also be produced by charged particles that are moving fast and accelerated when trapped to spiral around magnetic field lines. Such acceleration continually supplies the particle with extra energy, which it then releases a ...
... violent and dramatic regions of our Universe. Synchrotron Emission X-rays can also be produced by charged particles that are moving fast and accelerated when trapped to spiral around magnetic field lines. Such acceleration continually supplies the particle with extra energy, which it then releases a ...
Why Aren`t All Galaxies Barred?
... Although the initial disk of stars in Fig. 3 was in equilibrium, the equilibrium is about as unstable as a pencil balanced on its point. Just as a tiny disturbance will cause the pencil to fall, so a slight clumping of stars will attract more, making the attraction stronger and so dragging in yet m ...
... Although the initial disk of stars in Fig. 3 was in equilibrium, the equilibrium is about as unstable as a pencil balanced on its point. Just as a tiny disturbance will cause the pencil to fall, so a slight clumping of stars will attract more, making the attraction stronger and so dragging in yet m ...
Virgo constellation
... circles the bulge of the galaxy, and it is rich with gas, dust and hydrogen gas. Because it has all the elements needed for star formation, it’s not surprising that astronomers have found many sites of stars inside. (space-facts.com) Along with M104’s core being unusually large and bright, another o ...
... circles the bulge of the galaxy, and it is rich with gas, dust and hydrogen gas. Because it has all the elements needed for star formation, it’s not surprising that astronomers have found many sites of stars inside. (space-facts.com) Along with M104’s core being unusually large and bright, another o ...
Tyler Gray - Angelfire
... Lyrae variables) yields roughly 26,000 light years. These data, if of significance, wouldn't immediately effect values for distances of particular objects in the Milky Way or beyond. The solar system is situated within a smaller spiral arm, called the Local or Orion ...
... Lyrae variables) yields roughly 26,000 light years. These data, if of significance, wouldn't immediately effect values for distances of particular objects in the Milky Way or beyond. The solar system is situated within a smaller spiral arm, called the Local or Orion ...
Integrated Science
... Earth, one teaspoonful would weigh a billion tons! Because of its small size and high density, a neutron star possesses a surface gravitational field about 2 x 1011 times that of Earth. Neutron stars can also have magnetic fields a million times stronger than the strongest magnetic fields produced o ...
... Earth, one teaspoonful would weigh a billion tons! Because of its small size and high density, a neutron star possesses a surface gravitational field about 2 x 1011 times that of Earth. Neutron stars can also have magnetic fields a million times stronger than the strongest magnetic fields produced o ...
Multiple Choice, continued Stars, Galaxies, and the Universe
... that light travels through space in 1 year. Because the speed of light through space is about 300,000 km/ s, light travels approximately 9.46 trillion kilometers in one year. Even after astronomers figured out that stars were far from Earth, the nature of the universe was hard to understand. Some as ...
... that light travels through space in 1 year. Because the speed of light through space is about 300,000 km/ s, light travels approximately 9.46 trillion kilometers in one year. Even after astronomers figured out that stars were far from Earth, the nature of the universe was hard to understand. Some as ...
CHAPTER 30: STARS, GALAXIES AND THE UNIVERSE Analyzing
... Some massive stars produce leftovers too massive to become a stable neutron star. These stars contract, and the force of the contraction leaves a black hole. black hole an object so massive and dense that even light cannot escape its gravity Constellations Dividing Up the Sky constellation one of 88 ...
... Some massive stars produce leftovers too massive to become a stable neutron star. These stars contract, and the force of the contraction leaves a black hole. black hole an object so massive and dense that even light cannot escape its gravity Constellations Dividing Up the Sky constellation one of 88 ...
White Dwarfs
... 18. Which of the following statements accurately describe some observed properties of type Ia and type II supernovae? a. Type Ia supernovae have hydrogen lines in their spectra. b. Type II supernovae have hydrogen lines in their spectra. c. Type Ia supernovae are more luminous. d. Both a and c above ...
... 18. Which of the following statements accurately describe some observed properties of type Ia and type II supernovae? a. Type Ia supernovae have hydrogen lines in their spectra. b. Type II supernovae have hydrogen lines in their spectra. c. Type Ia supernovae are more luminous. d. Both a and c above ...
The Missing Mass
... where P and a are the period and semi-major axis of the orbit, and the atom of gas is much less massive than the galaxy. If the atom’s orbit is circular, then a is the radius of the circle (r), and, according to Kepler’s 2nd law, the atom’s speed is constant. So ...
... where P and a are the period and semi-major axis of the orbit, and the atom of gas is much less massive than the galaxy. If the atom’s orbit is circular, then a is the radius of the circle (r), and, according to Kepler’s 2nd law, the atom’s speed is constant. So ...
Penentuan Jarak dalam Astronomi II
... spectacular phenomena on the heavens Last two SNe in our Milky Way Galaxy: SN 1572 (Tycho Brage’s supernova Ia (?) in the Cassiopeia constellation) achieved -4m at the maximun brightness SN 1604 (Kepler’s supernova Ia in the Ophiuchus constellation) achieved -2.5m As expected, we could have miss a n ...
... spectacular phenomena on the heavens Last two SNe in our Milky Way Galaxy: SN 1572 (Tycho Brage’s supernova Ia (?) in the Cassiopeia constellation) achieved -4m at the maximun brightness SN 1604 (Kepler’s supernova Ia in the Ophiuchus constellation) achieved -2.5m As expected, we could have miss a n ...
Friday, April 25 - Otterbein University
... • Conclusion: there are no stars beyond a certain distance ...
... • Conclusion: there are no stars beyond a certain distance ...
GRB jets and their interaction with the progenitor star
... opening angle of 10o and =10 is propagated through polytropic stars of varying mass and radius. The break-out time depends very mildly on the mass, so too the energy deposited into the star ...
... opening angle of 10o and =10 is propagated through polytropic stars of varying mass and radius. The break-out time depends very mildly on the mass, so too the energy deposited into the star ...
Distance
... Ques4ons • How much does the apparent brightness of stars we see in the sky vary? Why? • Stars have different colors? So is the amount of light at different wavelengths the same? • Can we tell the difference between a very luminous star that is far away and in intrinsically low luminosity st ...
... Ques4ons • How much does the apparent brightness of stars we see in the sky vary? Why? • Stars have different colors? So is the amount of light at different wavelengths the same? • Can we tell the difference between a very luminous star that is far away and in intrinsically low luminosity st ...
Formation of a Black Hole in the Dark - CEA-Irfu
... that the black holes in these two x-ray binaries were formed through different evolutionary paths. The black hole in GRO J1655-40 has a mass of (5.4 ± 0.3) MՎ (13) and was formed through an energetic supernova explosion and fall-back on a neutron star. The black hole in Cygnus X-1 which has a mass o ...
... that the black holes in these two x-ray binaries were formed through different evolutionary paths. The black hole in GRO J1655-40 has a mass of (5.4 ± 0.3) MՎ (13) and was formed through an energetic supernova explosion and fall-back on a neutron star. The black hole in Cygnus X-1 which has a mass o ...
The densest galaxy - SelectedWorks
... of only ∼24 pc, M60-UCD1 is more massive than any ultra-compact dwarfs of comparable size, and is arguably the densest galaxy known in the local universe. It has a two-component structure well fit by a sum of Sérsic functions, with an elliptical, compact (rh = 14 pc; n ∼ 3.3) inner component and a r ...
... of only ∼24 pc, M60-UCD1 is more massive than any ultra-compact dwarfs of comparable size, and is arguably the densest galaxy known in the local universe. It has a two-component structure well fit by a sum of Sérsic functions, with an elliptical, compact (rh = 14 pc; n ∼ 3.3) inner component and a r ...
Part I Light, Telescopes, Atoms and Stars
... cooler type of star called an L dwarf has been observed that extends the classifications one more full notch cooler ...
... cooler type of star called an L dwarf has been observed that extends the classifications one more full notch cooler ...
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... siblings, and that they all have spectra that are very blue—with the brightest wavelengths shining in the ultraviolet. According to Quimby, the two mysterious supernovae—2005ap and SCP 06F6—had looked diffe ...
... siblings, and that they all have spectra that are very blue—with the brightest wavelengths shining in the ultraviolet. According to Quimby, the two mysterious supernovae—2005ap and SCP 06F6—had looked diffe ...
Death of Stars notes
... explosions called supernovae, the chemical elements forged in the stars’ interiors-and created in the heat and pressure of the explosion--are released into space as a debris cloud of hot gas and dust. • Scientists had evidence of such dust formation, but couldn’t be sure that the dust wasn’t destroy ...
... explosions called supernovae, the chemical elements forged in the stars’ interiors-and created in the heat and pressure of the explosion--are released into space as a debris cloud of hot gas and dust. • Scientists had evidence of such dust formation, but couldn’t be sure that the dust wasn’t destroy ...
THE DENSEST GALAXY
... of templates of the same resolution and wavelength coverage, as described by Strader et al. (2011). This value is σp = 68 ± 5 km s−1 . The radial velocity of M60-UCD1 is 1290 ± 5 km s−1 ; the systemic velocity of M60 is 1117 km s−1 (González 1993). We estimate a dynamical mass for M60-UCD1 using th ...
... of templates of the same resolution and wavelength coverage, as described by Strader et al. (2011). This value is σp = 68 ± 5 km s−1 . The radial velocity of M60-UCD1 is 1290 ± 5 km s−1 ; the systemic velocity of M60 is 1117 km s−1 (González 1993). We estimate a dynamical mass for M60-UCD1 using th ...
Gamma-ray burst
Gamma-ray bursts (GRBs) are flashes of gamma rays associated with extremely energetic explosions that have been observed in distant galaxies. They are the brightest electromagnetic events known to occur in the universe. Bursts can last from ten milliseconds to several hours. The initial burst is usually followed by a longer-lived ""afterglow"" emitted at longer wavelengths (X-ray, ultraviolet, optical, infrared, microwave and radio).Most observed GRBs are believed to consist of a narrow beam of intense radiation released during a supernova or hypernova as a rapidly rotating, high-mass star collapses to form a neutron star, quark star, or black hole. A subclass of GRBs (the ""short"" bursts) appear to originate from a different process – this may be due to the merger of binary neutron stars. The cause of the precursor burst observed in some of these short events may be due to the development of a resonance between the crust and core of such stars as a result of the massive tidal forces experienced in the seconds leading up to their collision, causing the entire crust of the star to shatter.The sources of most GRBs are billions of light years away from Earth, implying that the explosions are both extremely energetic (a typical burst releases as much energy in a few seconds as the Sun will in its entire 10-billion-year lifetime) and extremely rare (a few per galaxy per million years). All observed GRBs have originated from outside the Milky Way galaxy, although a related class of phenomena, soft gamma repeater flares, are associated with magnetars within the Milky Way. It has been hypothesized that a gamma-ray burst in the Milky Way, pointing directly towards the Earth, could cause a mass extinction event.GRBs were first detected in 1967 by the Vela satellites, a series of satellites designed to detect covert nuclear weapons tests. Hundreds of theoretical models were proposed to explain these bursts in the years following their discovery, such as collisions between comets and neutron stars. Little information was available to verify these models until the 1997 detection of the first X-ray and optical afterglows and direct measurement of their redshifts using optical spectroscopy, and thus their distances and energy outputs. These discoveries, and subsequent studies of the galaxies and supernovae associated with the bursts, clarified the distance and luminosity of GRBs. These facts definitively placed them in distant galaxies and also connected long GRBs with the explosion of massive stars, the only possible source for the energy outputs observed.