The Sky
... the sky contains a number of less formally defined groupings called asterisms. – The Big Dipper, for example, is a well-known asterism that is part of the constellation Ursa Major (Great Bear). – Another asterism is the Great Square of Pegasus, which includes three stars from Pegasus and one (Alpher ...
... the sky contains a number of less formally defined groupings called asterisms. – The Big Dipper, for example, is a well-known asterism that is part of the constellation Ursa Major (Great Bear). – Another asterism is the Great Square of Pegasus, which includes three stars from Pegasus and one (Alpher ...
Binarity in carbon-enhanced metal-poor stars
... The large class of CEMP-s stars is thought to obtain their overabundant carbon and s-process elements from a companion star that has gone through the asymptotic giant branch (AGB) phase and deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in fav ...
... The large class of CEMP-s stars is thought to obtain their overabundant carbon and s-process elements from a companion star that has gone through the asymptotic giant branch (AGB) phase and deposited large amounts of newly formed carbon and s-process material on its neighbour. Strong evidence in fav ...
xrayecc
... This transfer leads to variations in the orbital parameters, including the eccentricity, orbital period and separation. In some binary systems, the accreting component is degenerate, that is a neutron star, or black hole. The infalling matter thus loses a large amount of gravitational energy as it f ...
... This transfer leads to variations in the orbital parameters, including the eccentricity, orbital period and separation. In some binary systems, the accreting component is degenerate, that is a neutron star, or black hole. The infalling matter thus loses a large amount of gravitational energy as it f ...
WISE General Presentation - Georgia Southern University
... astronomers have been observing astronomical objects in Infrared Light to get a more complete picture ...
... astronomers have been observing astronomical objects in Infrared Light to get a more complete picture ...
SUMSS - 京都大学
... supermassive black holes (~109 solar masses) in nuclei of many ellipticals. Beyond z~2, radio galaxies have ‘disturbed’ optical morphology (Miley et al.), possibly implying that black hole formation precedes star formation? ...
... supermassive black holes (~109 solar masses) in nuclei of many ellipticals. Beyond z~2, radio galaxies have ‘disturbed’ optical morphology (Miley et al.), possibly implying that black hole formation precedes star formation? ...
Scientific Evidence for A
... When anti-matter and normal matter come into contact with each other, they destroy each other, producing energy in the form of Gamma-rays! e- + b+ 2 g ( 511 kev) ...
... When anti-matter and normal matter come into contact with each other, they destroy each other, producing energy in the form of Gamma-rays! e- + b+ 2 g ( 511 kev) ...
Notes for Class 5, February 16
... within the errors? (also from Part F) A. Find the highest and lowest divided averages from #2 and subtract them (= DIFF) B. Find the two highest errors from 1 and add them (= ...
... within the errors? (also from Part F) A. Find the highest and lowest divided averages from #2 and subtract them (= DIFF) B. Find the two highest errors from 1 and add them (= ...
Distance Measures: Parallax
... methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (for example, the Moon), and the Hubble Law being useful at the farthest distances. In this exercise, we investigate the ...
... methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (for example, the Moon), and the Hubble Law being useful at the farthest distances. In this exercise, we investigate the ...
Annual Report 2006/2007
... Stars form in galaxies from interstellar material, and at the end of their lives return chemicallyenriched material to the interstellar medium from which new generations of stars and planets form. The most massive and luminous stars evolve fastest, and leave neutron stars and black holes. This life ...
... Stars form in galaxies from interstellar material, and at the end of their lives return chemicallyenriched material to the interstellar medium from which new generations of stars and planets form. The most massive and luminous stars evolve fastest, and leave neutron stars and black holes. This life ...
Distance Measures: Parallax
... methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (for example, the Moon), and the Hubble Law being useful at the farthest distances. In this exercise, we investigate the ...
... methods of determining distances: radar, parallax, standard candles, and the Hubble Law. Each of these methods is most useful at certain distances, with radar being useful nearby (for example, the Moon), and the Hubble Law being useful at the farthest distances. In this exercise, we investigate the ...
ISP205L, Week 13 Computer Lab Activity The Distance to the Pleiades
... (g) Refer to the answer sheet, which the TA will have passed out at the start of the lab session. It includes a list of Right Ascension (RA) and Declination (Dec) coordinates for the stars that you need to observe. To slew to the first star, you have two choices. a. You can click on the N, S, E or W ...
... (g) Refer to the answer sheet, which the TA will have passed out at the start of the lab session. It includes a list of Right Ascension (RA) and Declination (Dec) coordinates for the stars that you need to observe. To slew to the first star, you have two choices. a. You can click on the N, S, E or W ...
01-Star Atlas Project - Mapping the Heavens
... of caution: up and down on the maps correspond to north and south on the celestial sphere only because people always hold maps with the north side up. In the sky, they are definitely not synonymous (as you'll learn in Chapter 2). Right ascension on the equatorial maps increases to the left, so left ...
... of caution: up and down on the maps correspond to north and south on the celestial sphere only because people always hold maps with the north side up. In the sky, they are definitely not synonymous (as you'll learn in Chapter 2). Right ascension on the equatorial maps increases to the left, so left ...
Effect of the stellar spin history on the tidal evolution of close
... Methods. We used a standard equilibrium tidal model to compute the orbital evolution of single planets orbiting both Sun-like stars and very low-mass stars (0.1 M ). We tested two stellar spin evolution profiles, one with fast initial rotation (1.2 day rotation period) and one with slow initial rot ...
... Methods. We used a standard equilibrium tidal model to compute the orbital evolution of single planets orbiting both Sun-like stars and very low-mass stars (0.1 M ). We tested two stellar spin evolution profiles, one with fast initial rotation (1.2 day rotation period) and one with slow initial rot ...
... 2449981. The phasing with Kholopov et al.’s (1987) period of 0.28779276 d gave a small displacements of the maximum light. A Phase Dispersion Minimization (PDM) analysis of our data produced a period of 0.288712 ± 0.000005 d. In the RRL data base of GEOS (2012) one can find a list of 96 times of max ...
PH607lec08
... Irregular galaxies come in two types: • Irr I which are in some sense a logical extension of the Hubble tuning fork, having characteristics "beyond" those of class Sc - high gas content, dominant presence of a young ...
... Irregular galaxies come in two types: • Irr I which are in some sense a logical extension of the Hubble tuning fork, having characteristics "beyond" those of class Sc - high gas content, dominant presence of a young ...
compound sentences
... B. 1. Connor had seen many parks in his life, but he never had seen a park like this one. 2. Dad brought a pair of binoculars, and Nate used them to look for animals. 3. He saw his first live bear, and the hair stood up on his arms. 4. It was an exciting moment, but it only lasted a second. 5. The b ...
... B. 1. Connor had seen many parks in his life, but he never had seen a park like this one. 2. Dad brought a pair of binoculars, and Nate used them to look for animals. 3. He saw his first live bear, and the hair stood up on his arms. 4. It was an exciting moment, but it only lasted a second. 5. The b ...
Radio Bubbles, Cooling X-ray Gas, Galaxy Interactions, and Star
... presence of gas ranging over a factor of two in X-ray temperature. High resolution imaging (to ∼ 100 ) by Chandra has revealed bubbles in the intracluster medium (ICM), gently inflated (not shocked) by radio plasma (McNamara et al. 2001, 2000; Bı̂rzan et al. 2004), as well as X-ray fronts, which are ...
... presence of gas ranging over a factor of two in X-ray temperature. High resolution imaging (to ∼ 100 ) by Chandra has revealed bubbles in the intracluster medium (ICM), gently inflated (not shocked) by radio plasma (McNamara et al. 2001, 2000; Bı̂rzan et al. 2004), as well as X-ray fronts, which are ...
Chemical analysis of 24 dusty (pre-) main
... Herbig Ae/Be (HAEBE) stars are generally thought to be the somewhat more massive analogues of the T Tauri stars, which are low-mass pre-main-sequence stars. They were first defined as a class in 1960 by Herbig, based on three observational criteria: the stars have spectral type A or earlier, display ...
... Herbig Ae/Be (HAEBE) stars are generally thought to be the somewhat more massive analogues of the T Tauri stars, which are low-mass pre-main-sequence stars. They were first defined as a class in 1960 by Herbig, based on three observational criteria: the stars have spectral type A or earlier, display ...
Multiple sources or late injection of short-lived r
... Irrespective of their mean-lives, if extinct r-radionuclides were derived from GCE with the same free decay interval, they should lie on a unique curve parameterized by the previous equation for a specific value of ∆. Wasserburg et al. [5] and Qian et al. [6] did a similar analysis. They concluded th ...
... Irrespective of their mean-lives, if extinct r-radionuclides were derived from GCE with the same free decay interval, they should lie on a unique curve parameterized by the previous equation for a specific value of ∆. Wasserburg et al. [5] and Qian et al. [6] did a similar analysis. They concluded th ...
Mid-infrared imaging of the dust shell around the post
... for each filter by exposing on sky and on a polystyrene flat-field source without chopping and nodding and the flat-field constructed using the OFLAT task, which is part of the GEMINI package within IRAF. The observing details are summarized in Table 1. The observations were reduced using the OREDUC ...
... for each filter by exposing on sky and on a polystyrene flat-field source without chopping and nodding and the flat-field constructed using the OFLAT task, which is part of the GEMINI package within IRAF. The observing details are summarized in Table 1. The observations were reduced using the OREDUC ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.