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 ...
Astronomy Astrophysics Detailed abundances of a large sample of giant stars in... and in the Sagittarius nucleus
... the small (mainly disk) objects such as M 4 and M 71 to the more massive (mainly inner halo) clusters such as NGC 7078 (M 15) and NGC 2808. This universality of the chemical pattern is the result of the superposition of at least two stellar generations; these are slightly spaced in time, and distinc ...
... the small (mainly disk) objects such as M 4 and M 71 to the more massive (mainly inner halo) clusters such as NGC 7078 (M 15) and NGC 2808. This universality of the chemical pattern is the result of the superposition of at least two stellar generations; these are slightly spaced in time, and distinc ...
2 The Concept of “Spectral Classes”
... often refer to chemical abundance anomalies, and they tend to differ from one spectral type to another, and each of their values is distinct from any other. So, for example, a value P4 = 3 for A star spectra has a different meaning than P4 =3 for M stars. The Appendix B tables for these codes are de ...
... often refer to chemical abundance anomalies, and they tend to differ from one spectral type to another, and each of their values is distinct from any other. So, for example, a value P4 = 3 for A star spectra has a different meaning than P4 =3 for M stars. The Appendix B tables for these codes are de ...
Pulsed Accretion in the Young Binary &
... - 8due to the circumstellar / circumbinary disk, and the blue and ultraviolet excesses and the stellar winds are due to accretion (Herbst et al. 1994). Herbig (1962) defined the optical characteristics of CTTS as: (i) Hydrogen Balmer lines and Ca II, H, and K lines in emission; (ii) anomalous emiss ...
... - 8due to the circumstellar / circumbinary disk, and the blue and ultraviolet excesses and the stellar winds are due to accretion (Herbst et al. 1994). Herbig (1962) defined the optical characteristics of CTTS as: (i) Hydrogen Balmer lines and Ca II, H, and K lines in emission; (ii) anomalous emiss ...
SherwoodWA_1973redux - Edinburgh Research Archive
... which have been adapted for this thesis by Herr W. David Cooper and ...
... which have been adapted for this thesis by Herr W. David Cooper and ...
sections 19-22 instructor notes
... velocities of hydrogen clouds along such lines of sight in the 1st and 4th quadrants, respectively, must originate from gas located at the tangent points, if there is any. In general terms there will always be some hydrogen gas at the tangent points, but their maximum and/or minimum radial motions w ...
... velocities of hydrogen clouds along such lines of sight in the 1st and 4th quadrants, respectively, must originate from gas located at the tangent points, if there is any. In general terms there will always be some hydrogen gas at the tangent points, but their maximum and/or minimum radial motions w ...
sections 19-22 instructor notes
... velocities of hydrogen clouds along such lines of sight in the 1st and 4th quadrants, respectively, must originate from gas located at the tangent points, if there is any. In general terms there will always be some hydrogen gas at the tangent points, but their maximum and/or minimum radial motions w ...
... velocities of hydrogen clouds along such lines of sight in the 1st and 4th quadrants, respectively, must originate from gas located at the tangent points, if there is any. In general terms there will always be some hydrogen gas at the tangent points, but their maximum and/or minimum radial motions w ...
![arXiv:1502.03605v2 [astro-ph.EP] 24 Apr 2015](http://s1.studyres.com/store/data/017598977_1-7182fa8223b5ceaded332d6412cd3a07-300x300.png)
Red supergiants around the obscured open cluster Stephenson 2
... Context. Several clusters of red supergiants have been discovered in a small region of the Milky Way close to the base of the ScutumCrux Arm and the tip of the Long Bar. Population synthesis models indicate that they must be very massive to harbour so many supergiants. Amongst these clusters, Stephe ...
... Context. Several clusters of red supergiants have been discovered in a small region of the Milky Way close to the base of the ScutumCrux Arm and the tip of the Long Bar. Population synthesis models indicate that they must be very massive to harbour so many supergiants. Amongst these clusters, Stephe ...
Ferraro et al. 2006
... BSS surface coming from a deeply peeled parent star, as expected in the case of mass-transfer formation channel Bologna-Dipartimento di (Ferraro et al. 2006) ...
... BSS surface coming from a deeply peeled parent star, as expected in the case of mass-transfer formation channel Bologna-Dipartimento di (Ferraro et al. 2006) ...
The Classification of Stellar Spectra
... The early spectral classification system was based on the appearance of the spectra, but the physical reason for these differences in spectra were not understood until the 1930’s and 1940’s. Then it was realized that, while there were some chemical differences among stars, the main thing that determ ...
... The early spectral classification system was based on the appearance of the spectra, but the physical reason for these differences in spectra were not understood until the 1930’s and 1940’s. Then it was realized that, while there were some chemical differences among stars, the main thing that determ ...
Emergency Land Navigation
... GEM1506K Heavenly Mathematics Advancements in navigational technology have made finding way much easier than before. Nowadays, all kinds of navigational equipment are available, from the basic compass, map, sextant and almanacs to the highly efficient radars and GPS devices. Although technology bri ...
... GEM1506K Heavenly Mathematics Advancements in navigational technology have made finding way much easier than before. Nowadays, all kinds of navigational equipment are available, from the basic compass, map, sextant and almanacs to the highly efficient radars and GPS devices. Although technology bri ...
Abstract book
... Title: Density or mass, which control the early stages of the star formation process? Abstract. How do stellar clusters form is a one of the key questions for understanding the physical mechanisms that drive the transformation of cold molecular gas into stars in different environments. In particular ...
... Title: Density or mass, which control the early stages of the star formation process? Abstract. How do stellar clusters form is a one of the key questions for understanding the physical mechanisms that drive the transformation of cold molecular gas into stars in different environments. In particular ...
Space, Earth and Celestial Objects Test Prep
... (3) larger, hotter, and less luminous (4) larger, cooler, and more luminous Astronomers viewing light from distant galaxies observe a shift of spectral lines toward the red end of the visible spectrum. This shift provides evidence that (1) orbital velocities of stars are decreasing (2) Earth’s atmos ...
... (3) larger, hotter, and less luminous (4) larger, cooler, and more luminous Astronomers viewing light from distant galaxies observe a shift of spectral lines toward the red end of the visible spectrum. This shift provides evidence that (1) orbital velocities of stars are decreasing (2) Earth’s atmos ...
THE MONTHLY SKY GUIDE, SIXTH EDITION
... streak of light dash across the sky like a cosmic laser beam, lasting no more than a second or so. This is a meteor, popularly termed a shooting star. Do not misidentify shooting stars with satellites or high-flying aeroplanes, which look like moving stars but drift at a more leisurely pace. Despite ...
... streak of light dash across the sky like a cosmic laser beam, lasting no more than a second or so. This is a meteor, popularly termed a shooting star. Do not misidentify shooting stars with satellites or high-flying aeroplanes, which look like moving stars but drift at a more leisurely pace. Despite ...
Lu_Ye
... The tidal disruption of a solar type star by an IMBH with a mass of 2104Msoalr is proposed for the special event of GRB 060614, which is nearby long burst but is not associated with a supernova ...
... The tidal disruption of a solar type star by an IMBH with a mass of 2104Msoalr is proposed for the special event of GRB 060614, which is nearby long burst but is not associated with a supernova ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.