observations and theory of star cluster formation
... Vogelaar and Wakker 1994). This power law structure includes both gas that is self-gravitating and gas that is non-self-gravitating, so the origin is not purely gravitational fragmentation. The most likely source is some combination of turbulence (see review in Falgarone and Phillips 1991), agglomer ...
... Vogelaar and Wakker 1994). This power law structure includes both gas that is self-gravitating and gas that is non-self-gravitating, so the origin is not purely gravitational fragmentation. The most likely source is some combination of turbulence (see review in Falgarone and Phillips 1991), agglomer ...
The Tip of the Red Giant Branch and Distance of the Magellanic
... formed in the literature. We do not make any attempt to transform a magnitude, i.e. an integrated flux over the passband, into a flux density at a reference wavelength, in order to suppress one step which already makes an assumption on the spectral distribution of the source. We only use the integra ...
... formed in the literature. We do not make any attempt to transform a magnitude, i.e. an integrated flux over the passband, into a flux density at a reference wavelength, in order to suppress one step which already makes an assumption on the spectral distribution of the source. We only use the integra ...
The structure of the compact planetary nebulae Cn 3-1 and M 3
... splitting is observed in the central regions (± 1 arcsec) of the nebula. A maximum velocity difference of line splitting of 0::: 33 km s -1 is observed at the stellar position (defined by the position of the continuum intensity peak in the twodimensional spectra). At other positions, the radial velo ...
... splitting is observed in the central regions (± 1 arcsec) of the nebula. A maximum velocity difference of line splitting of 0::: 33 km s -1 is observed at the stellar position (defined by the position of the continuum intensity peak in the twodimensional spectra). At other positions, the radial velo ...
ASTRONOMIA SPAIN inglés.qxd
... This is the English edition of the book “Astronomía made in Spain”, an idea that materialized in 2009, the International Year of Astronomy. In order to celebrate that event, the Spanish Astronomical Society (Sociedad Española de Astronomía, SEA) had the idea of publishing a book summarising the hist ...
... This is the English edition of the book “Astronomía made in Spain”, an idea that materialized in 2009, the International Year of Astronomy. In order to celebrate that event, the Spanish Astronomical Society (Sociedad Española de Astronomía, SEA) had the idea of publishing a book summarising the hist ...
HWWS 2010 - Monash University
... • Energy released from accretion material onto an object of mass M and radius R is • i.e. the (specific) power-to-mass ratio is just a function of radius… • Neutron stars are the ...
... • Energy released from accretion material onto an object of mass M and radius R is • i.e. the (specific) power-to-mass ratio is just a function of radius… • Neutron stars are the ...
Binary Star Formation Part 2
... Many calculations have not treated radiation transport but have assumed adiabatic heating starting from an assumed transition density but radiation transfer is important ...
... Many calculations have not treated radiation transport but have assumed adiabatic heating starting from an assumed transition density but radiation transfer is important ...
Bez nadpisu
... are different because we view the region where the stream and the outer parts of the disk interact from different angles. On the other hand, the depths of the minima are different because the “nose” of the red star, which is turned toward the white dwarf, is heated by radiation from the disk. After ...
... are different because we view the region where the stream and the outer parts of the disk interact from different angles. On the other hand, the depths of the minima are different because the “nose” of the red star, which is turned toward the white dwarf, is heated by radiation from the disk. After ...
models for low-mass x-ray binaries in the elliptical
... certain features, such as the luminosity break in the observed XLFs of spiral galaxies. The position of this break depends on the star formation history of the galaxy, and Wu suggested that it can be used as a probe of the galaxy’s merger history. In addition, the presence of faint primordial X-ray ...
... certain features, such as the luminosity break in the observed XLFs of spiral galaxies. The position of this break depends on the star formation history of the galaxy, and Wu suggested that it can be used as a probe of the galaxy’s merger history. In addition, the presence of faint primordial X-ray ...
Introduction to Observational Cosmology
... of e.g. luminosity, size, color, (environment), etc.. • Properties of the galaxy population can now be mapped (samples of >10,000) to z~1 and beyond: – disappearance of luminous blue galaxies – Red galaxies are becoming redder, etc.. ...
... of e.g. luminosity, size, color, (environment), etc.. • Properties of the galaxy population can now be mapped (samples of >10,000) to z~1 and beyond: – disappearance of luminous blue galaxies – Red galaxies are becoming redder, etc.. ...
Introduction to Dark Matter
... Apart from these methods, gravitational lensing – i.e. the effects associated with the gravitational deflection of light – has also played an important role in the study of dark matter. The notion that gravity can bend rays of light was proposed already by Newton, although the magnitude of this effe ...
... Apart from these methods, gravitational lensing – i.e. the effects associated with the gravitational deflection of light – has also played an important role in the study of dark matter. The notion that gravity can bend rays of light was proposed already by Newton, although the magnitude of this effe ...
Annual Report 2014 - Max Planck Institute for Astrophysics
... 2.3 An observational and theoretical view of the atomic gas distribution in galaxies . . . . . 2.4 New analytical model for turbulence pressure in galaxy clusters . . . . . . . . . . . . . . 2.5 Resolving the radio sky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6 Stell ...
... 2.3 An observational and theoretical view of the atomic gas distribution in galaxies . . . . . 2.4 New analytical model for turbulence pressure in galaxy clusters . . . . . . . . . . . . . . 2.5 Resolving the radio sky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6 Stell ...
Galaxy Pairs in the Sloan Digital Sky Survey
... We use a sample of close galaxy pairs selected from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) to investigate in what environments galaxy mergers occur and how the results of these mergers depend on differences in local galaxy density. The galaxies are quantified morphologically using tw ...
... We use a sample of close galaxy pairs selected from the Sloan Digital Sky Survey Data Release 4 (SDSS DR4) to investigate in what environments galaxy mergers occur and how the results of these mergers depend on differences in local galaxy density. The galaxies are quantified morphologically using tw ...
Planet Formation: Disk Formation and Evolution
... inside cold molecular clouds the thermal pressure will not provide much support against gravitational collapse. Some clouds, however, have observed supersonic motions1 and thermal gas pressure which may contribute to their stability. (ii) Rotational support: The gravitational force that is trying to ...
... inside cold molecular clouds the thermal pressure will not provide much support against gravitational collapse. Some clouds, however, have observed supersonic motions1 and thermal gas pressure which may contribute to their stability. (ii) Rotational support: The gravitational force that is trying to ...
A Comet-Hunter`s Legacy -
... causing the fuzzy blurring near its center, and emitting huge amounts of radiation, all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer together. At first, this will probably produce more and more extreme waves of star for ...
... causing the fuzzy blurring near its center, and emitting huge amounts of radiation, all the way from the infrared, to the X-ray region. Each hundred-million year passage will probably bring the two galaxies closer together. At first, this will probably produce more and more extreme waves of star for ...
Master`s thesis: On the investigation of dark matter haloes
... the dark matter component is the dominant of the two. This means that our Universe can essentially be expressed by two parameters: Ωm and ΩΛ . Astronomers today try to determine the values of Ωm and ΩΛ with better precision, and the values that best fit the data are approximately Ωm ≈ 0.27 and ΩΛ ≈ ...
... the dark matter component is the dominant of the two. This means that our Universe can essentially be expressed by two parameters: Ωm and ΩΛ . Astronomers today try to determine the values of Ωm and ΩΛ with better precision, and the values that best fit the data are approximately Ωm ≈ 0.27 and ΩΛ ≈ ...
Physical Processes in the Interstellar Medium
... atmospheric opacity these studies can only be done from space, and are limited to pencil-beam measurements of the absorption of light from bright stars or active galactic nuclei (AGN). We note that rotational and ro-vibrational emission lines from H2 have indeed been detected in the infrared, both i ...
... atmospheric opacity these studies can only be done from space, and are limited to pencil-beam measurements of the absorption of light from bright stars or active galactic nuclei (AGN). We note that rotational and ro-vibrational emission lines from H2 have indeed been detected in the infrared, both i ...
Rocky planetesimals as the origin of metals in DZ stars
... Farihi & Zuckerman 2009a). Thus, while there is firm observational evidence of pollution via circumstellar material, as yet there is none favouring the ISM. Aannestad et al. (1993) provided an extensive spatial, kinematical and calcium abundance analysis against which they tested likely scenarios of ...
... Farihi & Zuckerman 2009a). Thus, while there is firm observational evidence of pollution via circumstellar material, as yet there is none favouring the ISM. Aannestad et al. (1993) provided an extensive spatial, kinematical and calcium abundance analysis against which they tested likely scenarios of ...
Debris disks from an astronomical and an astrobiological viewpoint Gianni Cataldi
... We shall first have a brief look on the history of debris disks in astronomy. Advances in our understanding of debris disks have often been connected to new opportunities of observing the sky in the infrared (IR) portion of the electromagnetic spectrum, since the dust making up the disk thermally ra ...
... We shall first have a brief look on the history of debris disks in astronomy. Advances in our understanding of debris disks have often been connected to new opportunities of observing the sky in the infrared (IR) portion of the electromagnetic spectrum, since the dust making up the disk thermally ra ...
Environment and self-regulation in galaxy formation
... 1 − 2 Gyr at given galaxy mass. These differences should become even more pronounced when probing earlier epochs. As discussed in the review by Renzini (2006), however, studies of the intermediate redshift early-type galaxy population do not confirm this picture. The same colour evolution for both f ...
... 1 − 2 Gyr at given galaxy mass. These differences should become even more pronounced when probing earlier epochs. As discussed in the review by Renzini (2006), however, studies of the intermediate redshift early-type galaxy population do not confirm this picture. The same colour evolution for both f ...
Finding Dark Matter
... • Often the source, the lens, or both are moving so the effect is temporal – For SuperMACHO, the time scale is ~80 days ...
... • Often the source, the lens, or both are moving so the effect is temporal – For SuperMACHO, the time scale is ~80 days ...
m, a, e
... telescopes with those obtained while combining several such telescopes into an interferometric array (this technique, long practiced by radio astronomers, allows us to achieve very good, low-angular resolution, observations). ...
... telescopes with those obtained while combining several such telescopes into an interferometric array (this technique, long practiced by radio astronomers, allows us to achieve very good, low-angular resolution, observations). ...
Hubble Space Telescope Imaging of Post
... corresponds to a physical distance of about 22 kpc. It is important to note that since the PSQs were selected using an apparent magnitude cut the total luminosity given in Table 1 reflects contributions from both stellar and AGN components. Thus, some selected PSQs might be included in the sample th ...
... corresponds to a physical distance of about 22 kpc. It is important to note that since the PSQs were selected using an apparent magnitude cut the total luminosity given in Table 1 reflects contributions from both stellar and AGN components. Thus, some selected PSQs might be included in the sample th ...
Hot subdwarf stars-galactic orbits and distribution perpendicular to
... Hot subdwarfs are blue, horizontal-branch like stars, representing the late stages of evolution of stars having started with less than about 2.5 M⊙ on the main sequence. The hotter subdwarf B (sdB) stars form a well defined group. Their luminosity is of the order of 10 L⊙ and their surface temperatu ...
... Hot subdwarfs are blue, horizontal-branch like stars, representing the late stages of evolution of stars having started with less than about 2.5 M⊙ on the main sequence. The hotter subdwarf B (sdB) stars form a well defined group. Their luminosity is of the order of 10 L⊙ and their surface temperatu ...
Influence of the Gould Belt on Interstellar Extinction
... higher than that of the model by Arenou et al. (1992) is unlikely to be possible. To achieve a high accuracy of the extinction correction, it is more preferable to reveal specific absorbing clouds or to determine the individual extinction for each star from its highly accurate multiband photometry. ...
... higher than that of the model by Arenou et al. (1992) is unlikely to be possible. To achieve a high accuracy of the extinction correction, it is more preferable to reveal specific absorbing clouds or to determine the individual extinction for each star from its highly accurate multiband photometry. ...
A numerical study of recent tidal interactions between dwarf galaxies
... has an influence on the evolution of the dwarf galaxies. In all studies tidal stripping and tidal tails were observed. These interactions also led to star formation bursts in the dwarf galaxies. And there was stated by Mayer et al. (2001a) that dwarf galaxies in the Milky Way potential were transfor ...
... has an influence on the evolution of the dwarf galaxies. In all studies tidal stripping and tidal tails were observed. These interactions also led to star formation bursts in the dwarf galaxies. And there was stated by Mayer et al. (2001a) that dwarf galaxies in the Milky Way potential were transfor ...