Hostname: page-component-848d4c4894-wzw2p Total loading time: 0 Render date: 2024-05-15T01:46:49.141Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of AGN contribution on morphological parameters of their host galaxies

Published online by Cambridge University Press:  29 January 2021

Tilahun Getachew-Woreta ,
Mirjana Pović ,
Josefa Masegosa ,
Jaime Perea ,
Zeleke Beyoro-Amado  and
Isabel Márquez
Tilahun Getachew-Woreta
Affiliation:
Ethiopian Space Science and Technology Institute (ESSTI), Entoto Observatory and Research Center (EORC), Astronomy and Astrophysics Research and Development Division, P.O.Box 33679, Addis Ababa, Ethiopia Addis Ababa University (AAU), P.O.Box 1176, Addis Ababa, Ethiopia Bule Hora University (BHU), P.O.Box 144, Bule Hora, Ethiopia
Mirjana Pović
Affiliation:
Ethiopian Space Science and Technology Institute (ESSTI), Entoto Observatory and Research Center (EORC), Astronomy and Astrophysics Research and Development Division, P.O.Box 33679, Addis Ababa, Ethiopia Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de de la Astronomía, s/n, 18008, Granada, Spain
Josefa Masegosa
Affiliation:
Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de de la Astronomía, s/n, 18008, Granada, Spain
Jaime Perea
Affiliation:
Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de de la Astronomía, s/n, 18008, Granada, Spain
Zeleke Beyoro-Amado
Affiliation:
Ethiopian Space Science and Technology Institute (ESSTI), Entoto Observatory and Research Center (EORC), Astronomy and Astrophysics Research and Development Division, P.O.Box 33679, Addis Ababa, Ethiopia Addis Ababa University (AAU), P.O.Box 1176, Addis Ababa, Ethiopia
Isabel Márquez
Affiliation:
Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de de la Astronomía, s/n, 18008, Granada, Spain
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We tested how the AGN contribution (5%–75% of the total flux) may affect different morphological parameters commonly used in galaxy classification. We carried out all analysis at z ∼ 0 and at higher redshifts that correspond to the COSMOS field. Using a local training sample of >2000 visually classified galaxies, we carried out all measurements with and without the central source, and quantified how the contribution of a bright nuclear point source could affect different morphological parameters, such as: Abraham and Concelice-Bershady indices, Gini, Asymmetry, M20 moment of light, and Smoothness. We found that concentration indexes are less sensitive to both redshift and brightness in comparison to the other parameters. We also found that all parameters change significantly with AGN contribution. At z ∼ 0, up to a 10% of AGN contribution the morphological classification will not be significantly affect, but for ⩾ 25% of AGN contribution late-type spirals follow the range of parameters of elliptical galaxies and can therefore be misclassified early types.

Keywords

AGNmorphologygalSVM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 158 - 162
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

References

Abazajian, K. N., Jennifer, K., Adelman-McCarthy, et al. 2009, ApJS, 182, 543A10.1088/0067-0049/182/2/543CrossRefGoogle Scholar
Abraham, R. G., Valdes, F., Yee, H. K. C., et al. 1994, ApJ, 432, 7510.1086/174550CrossRefGoogle Scholar
Abraham, R. G., van den Bergh, S., Glazebrook, K., et al. 1996, ApJS, 107, 110.1086/192352CrossRefGoogle Scholar
Abraham, R. G., van den Bergh, , et al. 2003, ApJ, 588, 21810.1086/373919CrossRefGoogle Scholar
Adams, M. T. & Rudnick, L. 1977, AJ, 82, 857A10.1086/112139CrossRefGoogle Scholar
Baldwin, J. A., Phillips, M. M., Terlevich, et al. 1981, PASP, 93, 5B10.1086/130766CrossRefGoogle Scholar
Bertin, E. & Arnouts, S. 1996, A&A, 117, 393Google Scholar
Bershady, M. A., Jangren, A., Conselice, C. J., et al. 2000, AJ, 119, 264510.1086/301386CrossRefGoogle Scholar
Beyoro-Amado, Z., Pović, M., Sánchez-Portal, M., et al. 2019, MNRAS, 485, 1528A10.1093/mnras/stz427CrossRefGoogle Scholar
Chang, C. C. & Lin, C. J., 2011, ACM-T IST, 2, 27Google Scholar
Conselice, C. J., Bershady, M. A., Dickinson, M., et al. 2000, ApJ, 529, 88610.1086/308300CrossRefGoogle Scholar
Filippenko, A. 1995, hst.prop, 5792FGoogle Scholar
Heckman, T. M., Balick, B., & Sullivan, W. T., III. 1978, ApJ, 224, 745H10.1086/156423CrossRefGoogle Scholar
Ho Luis, C., 2008, ARAA, 46, 475–539Google Scholar
Huertas-Company, M., Rouan, D., Tasca, L., et al. 2008, A&A, 478, 971Google Scholar
Kauffmann, G., Heckman, T. M., et al. 2003, MNRAS, 346, 105510.1111/j.1365-2966.2003.07154.xCrossRefGoogle Scholar
Kewley, Lisa J. Groves, Brent, et al. 2006, MNRAS, 372, 961K10.1111/j.1365-2966.2006.10859.xCrossRefGoogle Scholar
Lotz, J. M., Primack, J., Madau, et al. 2004, AJ, 128, 163, MNRAS, 485, 452M10.1086/421849CrossRefGoogle Scholar
Moffat, J.W. 1969, PhRv, 177, 2456MGoogle Scholar
Nair, P. B. & Abraham, R. 2010, ApJS, 186, 42710.1088/0067-0049/186/2/427CrossRefGoogle Scholar
Peng, C. J. et al. 2002, AAS, 201, 1303PGoogle Scholar
Peng, C. J. et al. 2010, AAS, 139, 2097Google Scholar
Pierce, C. M., Lotz, J. M. et al. 2010, MNRAS, 405, 718Google Scholar
Pović, M., Sánchez-Portal, M., et al. 2012, A&A, 541, A118Google Scholar
Pović, M., Huertas-Company, M., et al. 2013, MNRAS, 435, 3444P10.1093/mnras/stt1538CrossRefGoogle Scholar
Pović, M., Márquez, I., et al. 2015, MNRAS, 453, 164410.1093/mnras/stv1663CrossRefGoogle Scholar
Scoville, N., Aussel, H., Brusa, M., et al. 2007, ApJS, 172, 110.1086/516585CrossRefGoogle Scholar
Willett, K. W. et al. 2013, MNRAS, 435, 283510.1093/mnras/stt1458CrossRefGoogle Scholar
York, D. G., Adelman, J., et al. 2000, AJ, 120, 157910.1086/301513CrossRefGoogle Scholar