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Astronomy / Astrophysics / Space Science

In this discipline: 70,421 papers · 663 groups

Discipline summary

Astronomy is the study of all objects and phenomena beyond the atmospheric boundaries of the Earth. Astrophysics is a subset of astronomy and physics concerned with the attributes that govern celestial objects. The differences between these disciplines were historically based on astronomy as an observational science, charged with the describing and cataloguing space, and astrophysics as a theoretical science; however, these differences are now largely semantic. Astronomers and astrophysicists today use a combination of observational and theoretical tools such as telescopes and analytical models.

Popular papers

  1. Libraries of stellar spectra are fundamental tools for the study of stellar populations, and both empirical and synthetic libraries have been used for this purpose. In this paper, a new library of high resolution synthetic spectra is presented,…
  2. The solar chemical composition is an important ingredient in our understanding of the formation, structure and evolution of both the Sun and our solar system. Furthermore, it is an essential reference standard against which the elemental contents of…
  3. We use N-body simulations to investigate the structure of dark halos in the standard Cold Dark Matter cosmogony. Halos are excised from simulations of cosmologically representative regions and are resimulated individually at high resolution. We…
  4. (Abridged) The WMAP 5-year data strongly limit deviations from the minimal LCDM model. We constrain the physics of inflation via Gaussianity, adiabaticity, the power spectrum shape, gravitational waves, and spatial curvature. We also constrain the…
  5. In Figure 6 we inadvertently labeled the proxy circular velocity as the virial velocity of the dark matter halo instead of what is actually plotted, the maximum circular velocity of the dark matter halo. The maximum halo circular velocity is a much…
  6. We present a full sky 100 micron map that is a reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with the zodiacal foreground and confirmed point sources removed. Before using the ISSA maps, we remove the remaining artifacts from the IRAS…
  7. The Sloan Digital Sky Survey (SDSS) will provide the data to support detailed investigations of the distribution of luminous and non- luminous matter in the Universe: a photometrically and astrometrically calibrated digital imaging survey of pi…
  8. Between 1997 June and 2001 February the Two Micron All Sky Survey (2MASS) collected 25.4 Tbytes of raw imaging data covering 99.998% of the celestial sphere in the near-infrared J (1.25 μm), H (1.65 μm), and Ks (2.16 μm) bandpasses. Observations…
  9. Standard star photometry dominated the latter half of the twentieth century reaching its zenith in the 1980s. It was introduced to take advantage of the high sensitivity and large dynamic range of photomultiplier tubes compared to photographic…
  10. We review the current theory of how galaxies form within the cosmological framework provided by the cold dark matter paradigm for structure formation. Beginning with the pre-galactic evolution of baryonic material we describe the analytical and…
  11. We present a comprehensive study of the physical properties of ~ 105 galaxies with measurable star formation in the Sloan Digital Sky Survey (SDSS). By comparing physical information extracted from the emission lines with continuum properties, we…
  12. At luminosities above 1011 luminosity of sun), infrared galaxies become the dominant population of extragalactic objects in the local Universe (z {approximately less than} 0.3), being more numerous than optically selected starburst and Seyfert…

Popular groups

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