Two and Three Dimensional Shape Distribution of Elliptical Galaxy NGC 315 Using Photometry

  • Unique Paper ID: 153324
  • Volume: 8
  • Issue: 6
  • PageNo: 432-435
  • Abstract:
  • The three dimensional shapes of the light distribution of elliptical galaxies can be determined by addng the photometric data profiles which is taken from the literature. We have used triaxial models which is sum of different models. In this paper, ensembles of models are used to make the shape estimates model independent. The methodology used was as described in Statler (1994), Chakraborty et al. (2008), Chakraborty et al. (2011), Singh (2011), Singh (2015) and Singh (2019) using flat prior and Singh & Diwakar (2020). In this paper a modified prior is applied to determine the shape of NGC 315. This paper shows that how the parameters get constrained at short to long axial ratios at very small and at very large radii, and the absolute value of the triaxiality difference are well constrained shape parameters. The three dimensional shape of elliptical galaxy NGC 315 is determined using a flat prior. The above three dimensional shape distribution can also be determined using modified prior. These results are compared with the previous estimates which are determined by using flat prior. The plot shows the intrinsic shapes distribution of the NGC 315 as a function of (q0,q∞,|Td|) for three dimensional shapes, where q0 and q∞ are the short to long axial ratios at small and at very large radii and |Td| is the absolute values of the triaxiality difference, defined as |Td| = |T∞-T0 |. The probability is shown by the plot of dark grey region; darker is the region it means that higher is the probability.

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Copyright © 2025 Authors retain the copyright of this article. This article is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

BibTeX

@article{153324,
        author = {Dr. Arun Kumar Singh},
        title = {Two and Three Dimensional Shape Distribution of Elliptical Galaxy NGC 315 Using Photometry},
        journal = {International Journal of Innovative Research in Technology},
        year = {},
        volume = {8},
        number = {6},
        pages = {432-435},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=153324},
        abstract = {The three dimensional shapes of the light distribution of elliptical galaxies can be determined by addng the photometric data profiles which is taken from the literature. We have used triaxial models which is sum of different models. In this paper, ensembles of models are used to make the shape estimates model independent. The methodology used was as described in Statler (1994), Chakraborty et al. (2008), Chakraborty et al. (2011), Singh (2011), Singh (2015) and Singh (2019) using flat prior and Singh & Diwakar (2020). In this paper a modified prior is applied to determine the shape of NGC 315. This paper shows that how the parameters get constrained at short to long axial ratios at very small and at very large radii, and the absolute value of the triaxiality difference are well constrained shape parameters. The three dimensional shape of elliptical galaxy NGC 315 is determined using a flat prior. The above three dimensional shape distribution can also be determined using modified prior. These results are compared with the previous estimates which are determined by using flat prior. The plot shows the intrinsic shapes distribution of the NGC 315 as a function of  (q0,q∞,|Td|) for three dimensional shapes, where q0 and q∞ are the short to long axial ratios at small and at very large radii and |Td| is the absolute values of the triaxiality difference, defined as |Td| = |T∞-T0 |. The probability is shown by the plot of dark grey region; darker is the region it means that higher is the probability. },
        keywords = {The three dimensional shapes of the light distribution of elliptical galaxies can be determined by addng the photometric data profiles which is taken from the literature. We have used triaxial models which is sum of different models. In this paper, ensembles of models are used to make the shape estimates model independent. The methodology used was as described in Statler (1994), Chakraborty et al. (2008), Chakraborty et al. (2011), Singh (2011), Singh (2015) and Singh (2019) using flat prior and Singh & Diwakar (2020). In this paper a modified prior is applied to determine the shape of NGC 315. This paper shows that how the parameters get constrained at short to long axial ratios at very small and at very large radii, and the absolute value of the triaxiality difference are well constrained shape parameters. The three dimensional shape of elliptical galaxy NGC 315 is determined using a flat prior. The above three dimensional shape distribution can also be determined using modified prio},
        month = {},
        }

Cite This Article

  • ISSN: 2349-6002
  • Volume: 8
  • Issue: 6
  • PageNo: 432-435

Two and Three Dimensional Shape Distribution of Elliptical Galaxy NGC 315 Using Photometry

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