Browsing Research and Publications - Department of Physics & Astronomy by Author "Laurikainen, E."

Browsing Research and Publications - Department of Physics & Astronomy by Author "Laurikainen, E."

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  • Laurikainen, E.; Salo, H.; Buta, Ronald J.; Knapen, J. H. (2009-01-21)
    The origin of S0 galaxies is discussed in the framework of early mergers in a cold dark matter cosmology, and in a scenario where S0s are assumed to be former spirals stripped of gas. From an analysis of 127 early-type ...
  • Grouchy, R. D.; Buta, R.; Salo, H.; Laurikainen, E.; Speltincx, T. (American Astronomical Society, 2008-07-31)
    ESO 297-27, an intermediate-to-late-type spiral galaxy, exhibits a rare counter-winding spiral structure in which two sets of nonoverlapping arms open in opposite senses. We imaged ESO 297-27 along with 41 other galaxies ...
  • Buta, R.; Vasylyev, S.; Salo, H.; Laurikainen, E. (2005)
    The distribution of bar strengths in disk galaxies is a fundamental property of the galaxy population that has only begun to be explored. We have applied the bar-spiral separation method of Buta and coworkers to derive the ...
  • Buta, Ronald J.; Laurikainen, E.; Salo, H. (2004)
    The maximum value of the ratio of the tangential force to the mean background radial force is a useful quantitative measure of the strength of nonaxisymmetric perturbations in disk galaxies. Here we consider the distribution ...
  • Buta, R.; Laurikainen, E.; Salo, H.; Block, D. L.; Knapen, J. H. (American Astronomical Society, 2006-09-26)
    This paper reports on a near-infrared survey of early-type galaxies designed to provide information on bar strengths, bulges, disks, and bar parameters in a statistically well-defined sample of S0-Sa galaxies. Early-type ...
  • Truethardt, P.; Buta, R.; Salo, H.; Laurikainen, E. (American Astronomical Society, 2007-07-26)
    We have applied the Tremaine-Weinberg continuity equation method to derive the bar pattern speed in the SB(r)b galaxy NGC 2523 and the SB(r)0/a galaxy NGC 4245 using the calcium triplet absorption lines. These galaxies ...
  • Grouchy, R. D.; Buta, R. J.; Salo, H.; Laurikainen, E. (American Astronomical Society, 2010-05-10)
    Nonbarred ringed galaxies are relatively normal galaxies showing bright rings of star formation in spite of lacking a strong bar. This morphology is interesting because it is generally accepted that a typical galactic disk ...
  • Laurikainen, E.; Salo, H.; Athanassoula, E.; Bosma, A.; Buta, Ronald J.; Janz, J. (2013-02-26)
    The fractions and dimension of bars, rings and lenses are studied in the near-infrared (IR) S0 galaxy survey, which is a sample of ~200 early-type disc galaxies, mainly S0s. We find evidence that multiple lenses in some ...

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