The most metal-poor galaxies
... IZw18 and IIZw40. They emphasised that they could be genuinely young galaxies in the process of formation, because of their extreme metal under-abundance, more than 10 times less than solar, and even more extreme than that of HII regions found in the outskirts of spiral galaxies. At the time of this ...
... IZw18 and IIZw40. They emphasised that they could be genuinely young galaxies in the process of formation, because of their extreme metal under-abundance, more than 10 times less than solar, and even more extreme than that of HII regions found in the outskirts of spiral galaxies. At the time of this ...
I N S T
... Periodic Error Correction (PEC)..........................................................................................................................................................39 Using Periodic Error Correction ................................................................................ ...
... Periodic Error Correction (PEC)..........................................................................................................................................................39 Using Periodic Error Correction ................................................................................ ...
X-Ray Spectroscopy of Stars
... In cooler stars of spectral classes F to M, magnetic coronae, overall analogous to the solar corona, are at the origin of X-rays, enriched by flares in which unstable magnetic fields reconnect and release enormous amounts of energy in a matter of minutes to hours. The presence of coronae in these st ...
... In cooler stars of spectral classes F to M, magnetic coronae, overall analogous to the solar corona, are at the origin of X-rays, enriched by flares in which unstable magnetic fields reconnect and release enormous amounts of energy in a matter of minutes to hours. The presence of coronae in these st ...
Article PDF - IOPscience
... Received 2009 December 22; accepted 2010 March 11; published 2010 April 5 ...
... Received 2009 December 22; accepted 2010 March 11; published 2010 April 5 ...
Galaxies Astronomy 1 — Elementary Astronomy LA Mission College Spring F2015
... A. It would inevitably get sucked into the black hole with no possibility of escape. B. It would detect the gravitational pull of the black hole and be able to go into orbit around it. C. It would be unable to locate the black hole because it’s, well, black. D. It would be repelled by the black hole ...
... A. It would inevitably get sucked into the black hole with no possibility of escape. B. It would detect the gravitational pull of the black hole and be able to go into orbit around it. C. It would be unable to locate the black hole because it’s, well, black. D. It would be repelled by the black hole ...
Article PDF - IOPscience
... Even though the PS1 3p survey holds great potential for Galactic studies due to its depth and sky coverage, it is a challenging data set for selection of RR Lyrae stars due to its sparse temporal coverage, cadence, and asynchronous multiband observations (see Figure 1). As we described in our previo ...
... Even though the PS1 3p survey holds great potential for Galactic studies due to its depth and sky coverage, it is a challenging data set for selection of RR Lyrae stars due to its sparse temporal coverage, cadence, and asynchronous multiband observations (see Figure 1). As we described in our previo ...
Studies of molecular clouds at the Galactic centre Roland Karlsson DECLINATION (B1950)
... spiral galaxy, with a central bar structure, that harbours a few hundred billion stars and large amounts of gas and dust. At the centre of the Galaxy, a 4 million solar mass supermassive black hole resides, surrounded by a dense core of millions of stars, as well as molecular and dust clouds. The Ga ...
... spiral galaxy, with a central bar structure, that harbours a few hundred billion stars and large amounts of gas and dust. At the centre of the Galaxy, a 4 million solar mass supermassive black hole resides, surrounded by a dense core of millions of stars, as well as molecular and dust clouds. The Ga ...
interstellar dust - Ira-Inaf
... visual and ultraviolet wavelengths, and reradiates the absorbed energy in the far-infrared part of the spectrum, thereby providing a major part (~ 30%) of the total luminosity of the Galaxy. ...
... visual and ultraviolet wavelengths, and reradiates the absorbed energy in the far-infrared part of the spectrum, thereby providing a major part (~ 30%) of the total luminosity of the Galaxy. ...
Observational evidence for AGN feedback in early
... A major amendment in recent models of hierarchical galaxy formation is the inclusion of socalled active galactic nucleus (AGN) feedback. The energy input from an active central massive black hole is invoked to suppress star formation in early-type galaxies at later epochs. A major problem is that th ...
... A major amendment in recent models of hierarchical galaxy formation is the inclusion of socalled active galactic nucleus (AGN) feedback. The energy input from an active central massive black hole is invoked to suppress star formation in early-type galaxies at later epochs. A major problem is that th ...
2 Justification and benefits in joining TMT
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark components is the most fundamental question in (astro-)physics today. The discovery of more than 400 extrasolar planet systems indicates that our solar system may be the exception rather than the norm; ...
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark components is the most fundamental question in (astro-)physics today. The discovery of more than 400 extrasolar planet systems indicates that our solar system may be the exception rather than the norm; ...
Science Case for the Chinese Participation of TMT
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark components is the most fundamental question in (astro-)physics today. The discovery of more than 400 extrasolar planet systems indicates that our solar system may be the exception rather than the norm; ...
... reveal that the Universe is dominated by dark matter and dark energy. The nature of these two dark components is the most fundamental question in (astro-)physics today. The discovery of more than 400 extrasolar planet systems indicates that our solar system may be the exception rather than the norm; ...
The presence of gamma rays in space was known before they were
... White dwarfs are the core remnant of a small sun. When a sun of a certain size, 1.44 solar masses or less, burns up the last of its fusionable material, instead of becoming a black hole or neutron star it becomes a white dwarf. The outer layers of the star are discharged as a planetary nebula. It is ...
... White dwarfs are the core remnant of a small sun. When a sun of a certain size, 1.44 solar masses or less, burns up the last of its fusionable material, instead of becoming a black hole or neutron star it becomes a white dwarf. The outer layers of the star are discharged as a planetary nebula. It is ...
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry
... Cluster with previously measured kinematic properties. The global optical colors are red, with median values for the sample of 0.24 ± 0.03 in (U–B), 0.77 ± 0.02 in (B– V), and 1.02 ± 0.03 in (V–I). We recover the well known color-magnitude relation for cluster galaxies, but find no significant diffe ...
... Cluster with previously measured kinematic properties. The global optical colors are red, with median values for the sample of 0.24 ± 0.03 in (U–B), 0.77 ± 0.02 in (B– V), and 1.02 ± 0.03 in (V–I). We recover the well known color-magnitude relation for cluster galaxies, but find no significant diffe ...
Debris Disks: Seeing Dust, Thinking of Planetesimals and Planets
... is argued that the giant planets and the Kuiper belt have originally formed in a more compact configuration (the “Nice model”, Gomes et al. 2005), and that it went through a short-lasting period of dynamical instability, likely explaining the geologically recorded event of the Late Heavy Bombardment ...
... is argued that the giant planets and the Kuiper belt have originally formed in a more compact configuration (the “Nice model”, Gomes et al. 2005), and that it went through a short-lasting period of dynamical instability, likely explaining the geologically recorded event of the Late Heavy Bombardment ...
Tracing the Evolution and Impact of the Stellar Winds
... There is one section not shown in Figure 1.2 that lies between the termination shock and the heliosphere: the heliosheath. In this region, the solar wind becomes turbulent and continues to slow. The next section of the heliosphere is the heliopause. This is the precise boundary where the winds of th ...
... There is one section not shown in Figure 1.2 that lies between the termination shock and the heliosphere: the heliosheath. In this region, the solar wind becomes turbulent and continues to slow. The next section of the heliosphere is the heliopause. This is the precise boundary where the winds of th ...
LCM SerieS
... computer automated technology. Simple and friendly to use, the LCM telescope is up and running after locating just three bright celestial objects. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the LCM’s built-in Sky Tour featur ...
... computer automated technology. Simple and friendly to use, the LCM telescope is up and running after locating just three bright celestial objects. It’s the perfect combination of power and portability. If you are new to astronomy, you may wish to start off by using the LCM’s built-in Sky Tour featur ...
Carbon, nitrogen and oxygen abundances in
... He I lines the helium abundance He/H and the projected rotational velocity v sin i for 102 B stars. The v sin i values were found to range from 5 to 280 km s−1 ; such a large variation allowed us to analyse a relation between the helium abundances and rotational velocities. The used He I lines are s ...
... He I lines the helium abundance He/H and the projected rotational velocity v sin i for 102 B stars. The v sin i values were found to range from 5 to 280 km s−1 ; such a large variation allowed us to analyse a relation between the helium abundances and rotational velocities. The used He I lines are s ...
Jul y 10-12,
... Almost all Galactic black hole (BH) binaries with low mass donors are transient X-ray sources; we expect most of the X-ray transients (XRTs) observed in external galaxies to be BH binaries also. Obtaining period estimates for extra-galactic XRTs is challenging, but the resulting period distribution ...
... Almost all Galactic black hole (BH) binaries with low mass donors are transient X-ray sources; we expect most of the X-ray transients (XRTs) observed in external galaxies to be BH binaries also. Obtaining period estimates for extra-galactic XRTs is challenging, but the resulting period distribution ...
Untitled - NMSU Astronomy
... wavelength of spectral lines in nanometers, and measure the sizes of features on the Sun that are larger than 100,000 kilometers. ...
... wavelength of spectral lines in nanometers, and measure the sizes of features on the Sun that are larger than 100,000 kilometers. ...
SPICA Yellow Book
... A complete understanding of the formation and evolution of galaxies, stars and planets can only be reached through the investigation of the cold and obscured parts of the Universe, where the basic processes of formation and evolution occur. Deep exploration of the cold Universe using high spatial re ...
... A complete understanding of the formation and evolution of galaxies, stars and planets can only be reached through the investigation of the cold and obscured parts of the Universe, where the basic processes of formation and evolution occur. Deep exploration of the cold Universe using high spatial re ...
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.