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Gauss's Law: Planar Symmetry01:27

Gauss's Law: Planar Symmetry

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A planar symmetry of charge density is obtained when charges are uniformly spread over a large flat surface. In planar symmetry, all points in a plane parallel to the plane of charge are identical with respect to the charges. Suppose the plane of the charge distribution is the xy-plane, and the electric field at a space point P with coordinates (x, y, z) is to be determined. Since the charge density is the same at all (x, y) - coordinates in the z = 0 plane, by symmetry, the electric field at P...
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Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
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A charge distribution has cylindrical symmetry if the charge density depends only upon the distance from the axis of the cylinder and does not vary along the axis or with the direction about the axis. In other words, if a system varies if it is rotated around the axis or shifted along the axis, it does not have cylindrical symmetry. In real systems, we do not have infinite cylinders; however, if the cylindrical object is considerably longer than the radius from it that we are interested in,...
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Gauss's Law: Spherical Symmetry01:26

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A charge distribution has spherical symmetry if the density of charge depends only on the distance from a point in space and not on the direction. In other words, if the system is rotated, it doesn't look different. For instance, if a sphere of radius R is uniformly charged with charge density ρ0, then the distribution has spherical symmetry. On the other hand, if a sphere of radius R is charged so that the top half of the sphere has a uniform charge density ρ1 and the bottom half has a...
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S-PLUS: LEnticular Galaxies in Stripe 82 (LEGS82).

Arianna Cortesi1, Kanak Saha2, Fabricio Ferrari3

  • 1Observatório do Valongo (OV), Ladeira do Pedro Antônio 43, Centro, 20080-090 Rio de Janeiro, RJ, Brazil.

Anais Da Academia Brasileira De Ciencias
|May 19, 2021
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This summary is machine-generated.

This study combines Southern Photometric Local Universe Survey (S-PLUS) and SDSS data to analyze lenticular galaxy structures. Preliminary findings reveal correlations between galaxy shapes and stellar populations, enhancing our understanding of the nearby universe.

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Area of Science:

  • Astronomy
  • Astrophysics
  • Cosmology

Background:

  • Lenticular galaxies are crucial for understanding galaxy evolution.
  • The Stripe 82 region offers a valuable dataset for astronomical studies.
  • Novel multi-wavelength surveys like S-PLUS provide unprecedented data for galaxy research.

Purpose of the Study:

  • To investigate the structural properties of lenticular galaxies in the Stripe 82 region.
  • To combine photometric and morphological data for a comprehensive galaxy analysis.
  • To explore the relationship between galaxy morphology and stellar population.

Main Methods:

  • Utilizing data from the Southern Photometric Local Universe Survey (S-PLUS) and Sloan Digital Sky Survey (SDSS).
  • Employing Bayesian Spectral type (BPZ) for stellar population analysis and photometric redshift estimation.
  • Applying Morfometryka (MFMTK) for non-parametric morphological quantification (e.g., asymmetry, concentration).

Main Results:

  • Demonstrated the effectiveness of combining BPZ and MFMTK for galaxy analysis.
  • Presented preliminary correlations between lenticular galaxy shapes and their stellar contents.
  • Highlighted the potential of the new S-PLUS dataset for extragalactic research.

Conclusions:

  • The combined S-PLUS and SDSS dataset offers a novel approach to studying galaxy structure and evolution.
  • Preliminary results suggest a link between the physical structure of lenticular galaxies and their stellar populations.
  • This research opens new avenues for understanding the nearby universe through detailed galaxy analysis.