Galaxy Assembly through Mergers
... The assembly of new galaxies through mergers of galaxies already in place has been long studied as a path of galaxy formation. Within this hierarchical model, where larger structures are built from smaller ones, more massive galaxies can then be assembled from less massive galaxies, thus contributin ...
... The assembly of new galaxies through mergers of galaxies already in place has been long studied as a path of galaxy formation. Within this hierarchical model, where larger structures are built from smaller ones, more massive galaxies can then be assembled from less massive galaxies, thus contributin ...
Supernova - Wikipedia, the free encyclopedia
... Swiss astrophysicist and astronomer Fritz Zwicky,[4][5] and was first used in print in 1926.[6] Several types of supernovae exist. Types I and II can be triggered in one of two ways, either turning off or suddenly turning on the production of energy through nuclear fusion. After the core of an aging ...
... Swiss astrophysicist and astronomer Fritz Zwicky,[4][5] and was first used in print in 1926.[6] Several types of supernovae exist. Types I and II can be triggered in one of two ways, either turning off or suddenly turning on the production of energy through nuclear fusion. After the core of an aging ...
THE 2MASS WIDE-FIELD T DWARF SEARCH. II. DISCOVERY OF
... ranged from clear and dry (September 20 and 24) to light cirrus and clouds (September 21–23 ), and seeing was poor (e1>5) on September 20 and 23, but excellent (d100 ) on the remaining nights. Pairs of 15 s integrations were obtained for each object, dithered 1000 –2000 between exposures. The sensit ...
... ranged from clear and dry (September 20 and 24) to light cirrus and clouds (September 21–23 ), and seeing was poor (e1>5) on September 20 and 23, but excellent (d100 ) on the remaining nights. Pairs of 15 s integrations were obtained for each object, dithered 1000 –2000 between exposures. The sensit ...
Document
... – Among one of the brightest members of the new class – The best studied of the sample – Showed a good range of the absorption/emission features used to characterize the set of stars ...
... – Among one of the brightest members of the new class – The best studied of the sample – Showed a good range of the absorption/emission features used to characterize the set of stars ...
X-Ray Spectroscopy of Stars
... late-type giants has meanwhile been identified in X-rays with characteristics grossly similar to what we know from the Sun. This includes objects as diverse as G- and K-type “solarlike” main-sequence stars, late-M dwarf “flare stars” and brown dwarfs (which are, however, fully convective and for whi ...
... late-type giants has meanwhile been identified in X-rays with characteristics grossly similar to what we know from the Sun. This includes objects as diverse as G- and K-type “solarlike” main-sequence stars, late-M dwarf “flare stars” and brown dwarfs (which are, however, fully convective and for whi ...
Communications in Asteroseismology
... “Mi-shell Brezhair” in France and Quebec! Mike is a man of many names, but for his more than 35 postgraduate students and many others he is also known as “mentor”, and all of us know him as “friend” and “colleague”. I (DWK) was Mike’s first PhD student at the University of Texas over 30 years ago. Wh ...
... “Mi-shell Brezhair” in France and Quebec! Mike is a man of many names, but for his more than 35 postgraduate students and many others he is also known as “mentor”, and all of us know him as “friend” and “colleague”. I (DWK) was Mike’s first PhD student at the University of Texas over 30 years ago. Wh ...
Power Point Presentation
... sources that you know are the same brightness The apparent brightness of the distant source will allow you to calculate its distance, compared to the nearby source This is because the brightness decreases like 1/(distance)2 March 11, 2003 ...
... sources that you know are the same brightness The apparent brightness of the distant source will allow you to calculate its distance, compared to the nearby source This is because the brightness decreases like 1/(distance)2 March 11, 2003 ...
The Lupus clouds - European Southern Observatory
... evolution and perhaps the origin of the complex. The entire variety of objects related to the various stages of early stellar evolution are represented in Lupus, including some of the best studied T Tauri stars like RU Lup. The determination of many properties of the clouds, as well as their associa ...
... evolution and perhaps the origin of the complex. The entire variety of objects related to the various stages of early stellar evolution are represented in Lupus, including some of the best studied T Tauri stars like RU Lup. The determination of many properties of the clouds, as well as their associa ...
kdtalk_jun2005 - The HST Treasury Program on Eta Carinae
... by dust. Result: The stellar wind is essentially polar -- a fairly revolutionary result for wind theory in general. · STIS 1998-2001: [ Sr II ] and other weird emission lines. · STIS 2000: Three-dimensional shape and orientation of the Homunculus. Found that the equatorial debris was ejected in two ...
... by dust. Result: The stellar wind is essentially polar -- a fairly revolutionary result for wind theory in general. · STIS 1998-2001: [ Sr II ] and other weird emission lines. · STIS 2000: Three-dimensional shape and orientation of the Homunculus. Found that the equatorial debris was ejected in two ...
THE DEMOGRAPHICS OF LONG-PERIOD COMETS ABSTRACT
... a conservative upper limit: most of these lost objects were most likely either not real to begin with or fastmoving objects only visible for a short window of time. Secondly, some comets might have been inactive at these large heliocentric distances, and hence classified as minor planets. The minor p ...
... a conservative upper limit: most of these lost objects were most likely either not real to begin with or fastmoving objects only visible for a short window of time. Secondly, some comets might have been inactive at these large heliocentric distances, and hence classified as minor planets. The minor p ...
Comet Kirch in Art and Astronomy
... Descriptions Made by Witnesses and Explorers The Kirch Comet is one of the brightest comets during the 17th century, visible even during the day. Because of this, many stories were preserved by its spectators and observers. In America it caused an unusual stir. Here is an extract of the book “Histor ...
... Descriptions Made by Witnesses and Explorers The Kirch Comet is one of the brightest comets during the 17th century, visible even during the day. Because of this, many stories were preserved by its spectators and observers. In America it caused an unusual stir. Here is an extract of the book “Histor ...
High-mass star-forming cloud G0.38+0.04 in the Galactic center dust
... Sgr B2 (M): there is only one SiO maser spot in Sgr B2, located near Mehringer et al. (1994) H2 CO Source C (not to be confused with Cloud C, the topic of this paper). The Sgr B2 H2 CO maser C is peculiar even among the Sgr B2 masers in that the emission appears to be spatially and spectrally resolv ...
... Sgr B2 (M): there is only one SiO maser spot in Sgr B2, located near Mehringer et al. (1994) H2 CO Source C (not to be confused with Cloud C, the topic of this paper). The Sgr B2 H2 CO maser C is peculiar even among the Sgr B2 masers in that the emission appears to be spatially and spectrally resolv ...
Here - NASA/IPAC Extragalactic Database
... the morphology of H ii regions is generally rather complex on all scales. Typical hydrogen densities n are 103 – 104 cm−3 for compact H ii regions. The average densities in giant extragalactic H ii regions are lower, typically 102 cm−3 since giant H ii regions encompass also zones of diffuse materia ...
... the morphology of H ii regions is generally rather complex on all scales. Typical hydrogen densities n are 103 – 104 cm−3 for compact H ii regions. The average densities in giant extragalactic H ii regions are lower, typically 102 cm−3 since giant H ii regions encompass also zones of diffuse materia ...
NAVIGATION SCHOOL AND COLLEGE
... If! recent years a number of schools and colleges have introduced navigation into their curricula because of the subject's broad educational value, and the examining bodies for the General Certificate of Education and the Scottish Certificate of Education have been setting examination papers in navi ...
... If! recent years a number of schools and colleges have introduced navigation into their curricula because of the subject's broad educational value, and the examining bodies for the General Certificate of Education and the Scottish Certificate of Education have been setting examination papers in navi ...
my dissertation (PhD. Thesis) - Argelander
... Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned by research conducted on galaxies at various distances. • Galaxies at cosmological distances may sh ...
... Group to galaxies at a redshift of z ' 11 and higher. Each approach can deliver different information and has its advantages and disadvantages. In the following, I briefly describe what can be learned by research conducted on galaxies at various distances. • Galaxies at cosmological distances may sh ...
The Formation of Population III Stars in Gas Accretion Stage: Effects
... a collapsing primordial cloud with a simple initial setting and showed fragmentation before protostar formation (see also Machida et al. 2008, 2009a,b). Recently, starting from the cosmological setting, Turk et al. (2009) also showed the possibility of fragmentation during the gas collapsing phase. ...
... a collapsing primordial cloud with a simple initial setting and showed fragmentation before protostar formation (see also Machida et al. 2008, 2009a,b). Recently, starting from the cosmological setting, Turk et al. (2009) also showed the possibility of fragmentation during the gas collapsing phase. ...
Hubble 2006: Science Year in Review
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
Report from the Subaru Telescope for External
... To detect the faint light from distant galaxies, the Subaru research team had often used narrow-band filters to catch the redshifted Lyman α emissions from distant galaxies. Observations of Lyα selected galaxies, also known as Lyα emitters (LAEs), have indicated that the Lyα luminosity functions (LFs ...
... To detect the faint light from distant galaxies, the Subaru research team had often used narrow-band filters to catch the redshifted Lyman α emissions from distant galaxies. Observations of Lyα selected galaxies, also known as Lyα emitters (LAEs), have indicated that the Lyα luminosity functions (LFs ...
The properties of a spectroscopically selected sample of cataclysmic variables Amornrat Aungwerojwit
... and patience, the work presented in this thesis could not have been satisfactory. I am grateful for his enthusiasm, which has inspired me and has picked me up out of the depths of despair numerous times. I am greatly indebted for his introducing me to the world of research and helping me to be invol ...
... and patience, the work presented in this thesis could not have been satisfactory. I am grateful for his enthusiasm, which has inspired me and has picked me up out of the depths of despair numerous times. I am greatly indebted for his introducing me to the world of research and helping me to be invol ...
astronomical dating of edvard munch`s - Digital Collections
... consulted biographies of Munch, exhibition catalogues, and a detailed year-by-year Munch chronology, which date this painting to 1893.3,4 We were intrigued to see that the list of 1893 works includes two other Åsgårdstrand paintings with astronomical content. In The Storm (Fig. 2), a bright star shi ...
... consulted biographies of Munch, exhibition catalogues, and a detailed year-by-year Munch chronology, which date this painting to 1893.3,4 We were intrigued to see that the list of 1893 works includes two other Åsgårdstrand paintings with astronomical content. In The Storm (Fig. 2), a bright star shi ...
Corvus (constellation)
Corvus is a small constellation in the Southern Celestial Hemisphere. Its name comes from the Latin word ""raven"" or ""crow"". It includes only 11 stars with brighter than 4.02 magnitudes. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations. The four brightest stars, Gamma, Delta, Epsilon, and Beta Corvi from a distinctive quadrilateral in the night sky. The young star Eta Corvi has been found to have two debris disks.