Galaxy Evolution Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mauro Giavalisco
... masses per year or M yr−1 (this is the total stellar mass, not the number, of new stars). The STELLAR MASSES of freshly produced stars are not all equal, but vary approximately between 100 solar masses to about one tenth of solar mass (i.e. stars whose mass is between one hundred times and one tent ...
... masses per year or M yr−1 (this is the total stellar mass, not the number, of new stars). The STELLAR MASSES of freshly produced stars are not all equal, but vary approximately between 100 solar masses to about one tenth of solar mass (i.e. stars whose mass is between one hundred times and one tent ...
Galaxy Evolution
... masses per year or M yr−1 (this is the total stellar mass, not the number, of new stars). The STELLAR MASSES of freshly produced stars are not all equal, but vary approximately between 100 solar masses to about one tenth of solar mass (i.e. stars whose mass is between one hundred times and one tent ...
... masses per year or M yr−1 (this is the total stellar mass, not the number, of new stars). The STELLAR MASSES of freshly produced stars are not all equal, but vary approximately between 100 solar masses to about one tenth of solar mass (i.e. stars whose mass is between one hundred times and one tent ...
here
... minutes to 24.8 arc minutes but increases in illumination from 27% to 48% during the course of the month. As the sun rises in late May, Venus will reach an altitude of about 23 degrees for observers at 40 degrees north. The brightest planet is at the descending node on May 9th. On May 22nd, Venus li ...
... minutes to 24.8 arc minutes but increases in illumination from 27% to 48% during the course of the month. As the sun rises in late May, Venus will reach an altitude of about 23 degrees for observers at 40 degrees north. The brightest planet is at the descending node on May 9th. On May 22nd, Venus li ...
Measuring distances to the edge of the local group
... Scientific Justification Be sure to include overall significance to astronomy. For standard proposals limit text to one page with figures, captions and references on no more than two additional pages. We propose to measure the distance to the nearby dwarf irregular galaxies Sextans A, B, and NGC 310 ...
... Scientific Justification Be sure to include overall significance to astronomy. For standard proposals limit text to one page with figures, captions and references on no more than two additional pages. We propose to measure the distance to the nearby dwarf irregular galaxies Sextans A, B, and NGC 310 ...
Astronomers` Observing Guides
... scheme of things. The second covers observing techniques, instrumental considerations and suggested activities and programs for the telescope user. ...
... scheme of things. The second covers observing techniques, instrumental considerations and suggested activities and programs for the telescope user. ...
2 Statistical properties of a sample of periodically variable B-type supergiants
... van Genderen et al. 1989; Lamers et al. 1998; van Genderen 2001). Burki (1978) considered a sample of 32 B- to G-type supergiants and derived an empirical semi-period-luminositycolour (PLC) relation (see his Eq. 5), from which he suggested the variability to be caused by oscillations rather than mas ...
... van Genderen et al. 1989; Lamers et al. 1998; van Genderen 2001). Burki (1978) considered a sample of 32 B- to G-type supergiants and derived an empirical semi-period-luminositycolour (PLC) relation (see his Eq. 5), from which he suggested the variability to be caused by oscillations rather than mas ...
NGC 6231: a young open cluster under X-rays
... • The canonical relation is tightly constrained V but still not understood on firm theoretical ground ! • Our sample is inhomogeneous in terms of spectral sub-type and luminosity class same mechanism for all • Confirmed by a recent study by Anthokin et al. on Cyg OB2 • Very limited room for the B ...
... • The canonical relation is tightly constrained V but still not understood on firm theoretical ground ! • Our sample is inhomogeneous in terms of spectral sub-type and luminosity class same mechanism for all • Confirmed by a recent study by Anthokin et al. on Cyg OB2 • Very limited room for the B ...
exoplanet observing for amateurs
... camera lens attached to an astronomer’s CDD, monitors a set of star fields for several months before moving on to another set of star fields. When a star appears to fade by a small amount for a short time (e.g., <0.030 magnitude for ~3 hours), and when these fading events occur at regular intervals ...
... camera lens attached to an astronomer’s CDD, monitors a set of star fields for several months before moving on to another set of star fields. When a star appears to fade by a small amount for a short time (e.g., <0.030 magnitude for ~3 hours), and when these fading events occur at regular intervals ...
Sample pages 1 PDF
... However, he could not explain this possible relationship. Was it that of cause and effect between the two, or was there something else involved that “… gave origin to both the change of weather and the meteors?” (Olmsted 1834a, p. 402). The meteors were at their most striking in frequency and brilli ...
... However, he could not explain this possible relationship. Was it that of cause and effect between the two, or was there something else involved that “… gave origin to both the change of weather and the meteors?” (Olmsted 1834a, p. 402). The meteors were at their most striking in frequency and brilli ...
comets, asteroids
... the Oort cloud after the man who discovered it Jan Oort. The Oort cloud is located 1000 times further away from the Sun than Neptune and Pluto. 27. What keeps the comet in orbit? 28. The Sun’s pulling power which is called gravity. It is the same force that keeps the Earth and other planets circling ...
... the Oort cloud after the man who discovered it Jan Oort. The Oort cloud is located 1000 times further away from the Sun than Neptune and Pluto. 27. What keeps the comet in orbit? 28. The Sun’s pulling power which is called gravity. It is the same force that keeps the Earth and other planets circling ...
Star Formation in the Rosette Complex
... Region. This region comprises the Mon OB1 Cloud (host of NGC 2264 and the Cone Nebula), the Monoceros Loop (NGC 2252), and the Mon OB2 Cloud in which the Rosette is one of the most prominent features (see Figure 2). The catalog name for the Rosette can be somewhat confusing because it is not unique: ...
... Region. This region comprises the Mon OB1 Cloud (host of NGC 2264 and the Cone Nebula), the Monoceros Loop (NGC 2252), and the Mon OB2 Cloud in which the Rosette is one of the most prominent features (see Figure 2). The catalog name for the Rosette can be somewhat confusing because it is not unique: ...
I. Constellations
... ____stars____ named after ____an animal____, ____a person____ or ___ an object ____. B. In modern astronomy, a constellation is defined as a specific ____area____ of the sky as determined by the International Astronomical Union (IAU). C. The celestial sphere is divided into __88___ contiguous region ...
... ____stars____ named after ____an animal____, ____a person____ or ___ an object ____. B. In modern astronomy, a constellation is defined as a specific ____area____ of the sky as determined by the International Astronomical Union (IAU). C. The celestial sphere is divided into __88___ contiguous region ...
The Life Cycle of Stars: Supernovae in Starbursts by Jason Kezwer
... 3.8 Representative reference star difference plots in H. . . . . . . . 3.9 Representative nuclear light curve in J. . . . . . . . . . . . . . . 3.10Representative reference star difference plots in J. . . . . . . . . 3.11K-band PSF at epoch #6 (after magnification) used for convolution with NICMOS d ...
... 3.8 Representative reference star difference plots in H. . . . . . . . 3.9 Representative nuclear light curve in J. . . . . . . . . . . . . . . 3.10Representative reference star difference plots in J. . . . . . . . . 3.11K-band PSF at epoch #6 (after magnification) used for convolution with NICMOS d ...
Article PDF - IOPscience
... wide range of colors (and include RR Lyrae variables), Fornax 4 is seen to have a red horizontal branch. Fornax 4 is D3 Gyr younger than the other Fornax globulars. Buonanno et al. draw attention to the fact that the colormagnitude diagram of Fornax 4 exhibits a strong resemblance to that of the ““ ...
... wide range of colors (and include RR Lyrae variables), Fornax 4 is seen to have a red horizontal branch. Fornax 4 is D3 Gyr younger than the other Fornax globulars. Buonanno et al. draw attention to the fact that the colormagnitude diagram of Fornax 4 exhibits a strong resemblance to that of the ““ ...
Astrometric accuracy during the past 2000 years
... After four centuries with gradual improvements another much larger jump in accuracy was obtained by the ESA satellite giving the Hipparcos and Tycho-2 catalogues containing a total of 2.5 million stars. Detailed explanation Errors of star position coordinates and parallaxes in accurate catalogues ar ...
... After four centuries with gradual improvements another much larger jump in accuracy was obtained by the ESA satellite giving the Hipparcos and Tycho-2 catalogues containing a total of 2.5 million stars. Detailed explanation Errors of star position coordinates and parallaxes in accurate catalogues ar ...
WILLIAM HERSCHEL AND THE `GARNET` STARS: μ CEPHEI AND
... Abstract: Although William Herschel‘s ‗Garnet Star‘ (µ Cephei) is a prominent object, the story of the discovery of this famous red star is not well documented. Prior to and after Herschel, the identification of this star was the subject of confusion in various catalogues and atlases. The case is co ...
... Abstract: Although William Herschel‘s ‗Garnet Star‘ (µ Cephei) is a prominent object, the story of the discovery of this famous red star is not well documented. Prior to and after Herschel, the identification of this star was the subject of confusion in various catalogues and atlases. The case is co ...
Hunting for Substructure in the Milky Way
... chemodynamical analysis and gives the best picture of the star’s history, and subsequently the history of the Milky Way. Studies are based on the principle that old, low mass stars retain information from the past, including when and where they formed. A star forms in the interstellar medium of the ...
... chemodynamical analysis and gives the best picture of the star’s history, and subsequently the history of the Milky Way. Studies are based on the principle that old, low mass stars retain information from the past, including when and where they formed. A star forms in the interstellar medium of the ...
Magnetic cycles of Sun-like stars with different levels of coronal and
... al. 2015 have studied a sample of ∼ 120 000 F, G and K stars from the LAMOST DR1 archive, which is an unprecedentedly large sample for a study of the H&K CaII emission. The δS index was measured for these stars, calculated as the difference between standard S-index and a ’zero’ emission line fitted ...
... al. 2015 have studied a sample of ∼ 120 000 F, G and K stars from the LAMOST DR1 archive, which is an unprecedentedly large sample for a study of the H&K CaII emission. The δS index was measured for these stars, calculated as the difference between standard S-index and a ’zero’ emission line fitted ...
On the nature of sn stars. I. A detailed abundance study
... sharp Balmer lines, sharp metallic lines (C II, Si II, Ca II, Ti II, Fe II), and broad coreless He I lines. Some of the sn stars seem to be related to CP stars. Initially Abt & Levato proposed a shell-like nature to explain the sn stars, although this scenario was subsequently questioned. There is n ...
... sharp Balmer lines, sharp metallic lines (C II, Si II, Ca II, Ti II, Fe II), and broad coreless He I lines. Some of the sn stars seem to be related to CP stars. Initially Abt & Levato proposed a shell-like nature to explain the sn stars, although this scenario was subsequently questioned. There is n ...
Spectral Matching for Elemental Abundances of Evolved Stars of Globular Clusters
... used to estimate the oxygen abundance of the stars, leading to a determination of whether a particular star was oxygen-rich or oxygen-poor. From this a catalogue of abundances of iron, carbon and barium of 848 giant branch stars were determined, of which 557 also had well-defined nitrogen abundances ...
... used to estimate the oxygen abundance of the stars, leading to a determination of whether a particular star was oxygen-rich or oxygen-poor. From this a catalogue of abundances of iron, carbon and barium of 848 giant branch stars were determined, of which 557 also had well-defined nitrogen abundances ...
Boötes
Boötes /boʊˈoʊtiːz/ is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from the Greek Βοώτης, Boōtēs, meaning herdsman or plowman (literally, ox-driver; from βοῦς bous “cow”). The ""ö"" in the name is a diaeresis, not an umlaut, meaning that each 'o' is to be pronounced separately.One of the 48 constellations described by the 2nd century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth brightest star in the night sky, the orange-hued Arcturus. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye.