Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-14T07:06:13.608Z Has data issue: false hasContentIssue false
  • English
  • Français

A New Reservoir of Dwarf Galaxy Candidates in the Centaurus A Group

Published online by Cambridge University Press:  30 October 2019

Matthew A. Taylor Open the ORCID record for Matthew A. Taylor [Opens in a new window] ,
Paul Eigenthaler ,
Thomas H. Puzia ,
Roberto P. Muñoz ,
Karen X. Ribbeck ,
Hong-Xin Zhang ,
Yasna Ordenes-Briceño  and
Mia Sauda Bovill
Matthew A. Taylor
Affiliation:
Gemini Observatory, Northern Operations Center, 670 North A’ohoku Place, Hilo, HI 96720-1906, USA email: mtaylor@gemini.edu
Paul Eigenthaler
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Thomas H. Puzia
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Roberto P. Muñoz
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Karen X. Ribbeck
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Hong-Xin Zhang
Affiliation:
CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, China
Yasna Ordenes-Briceño
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
Mia Sauda Bovill
Affiliation:
Texas Christian University, Dept. of Physics and Astronomy, 2800 S. University Dr., Fort Worth, TX 76129, USA
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 have searched optical u′g′r′i′z′ imaging of 22 deg2 centred on the nearby giant elliptical galaxy NGC 5128 for new dwarf galaxies in the Centaurus A group. We report 45 promising new candidates, which are broadly consistent with the properties of nearby dwarf spheroidal galaxies and extend the size-luminosity relation toward fainter total luminosities and smaller sizes for known dwarf galaxies outside the Local Group (LG). Altogether, these new results show NGC 5128 to be the host of a large reservoir of low-mass dwarf galaxies that is at least as rich as that of the LG and is ripe for detailed follow-up observations.

Keywords

galaxies: star clustersgalaxies: dwarfgalaxies: ellipticalgalaxies: individual (NGC5128)galaxies: interactions
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S344: Dwarf Galaxies: From the Deep Universe to the Present , August 2018 , pp. 353 - 356
Copyright
© International Astronomical Union 2019 

References

Bechtol, K., Drlica-Wagner, A., Balbinot, E., et al. 2015, ApJ, 807, 50 10.1088/0004-637X/807/1/50CrossRefGoogle Scholar
Belokurov, V., Walker, M. G., Evans, N. W., et al. 2010, ApJ (Letters), 712, L103 10.1088/2041-8205/712/1/L103CrossRefGoogle Scholar
Bennet, P., Sand, D. J., Crnojevi, D., et al. 2017, ApJ, 850, 109 CrossRefGoogle Scholar
Chiboucas, K., Karachentsev, I. D., & Tully, R. B. 2009, AJ, 137, 3009 CrossRefGoogle Scholar
Crnojevi, D., Sand, D. J., Caldwell, N., et al. 2014, ApJ (Letters), 795, L35 Google Scholar
Crnojevi, D., Sand, D. J., Spekkens, K., et al. 2016, ApJ, 823, 19 10.3847/0004-637X/823/1/19CrossRefGoogle Scholar
Eigenthaler, P., Puzia, T. H., Taylor, M. A., et al. 2018, ApJ, 855, 142 10.3847/1538-4357/aaab60CrossRefGoogle Scholar
Harris, G. L. H., Rejkuba, M., & Harris, W. E. 2010, PASA, 27, 457 10.1071/AS09061CrossRefGoogle Scholar
Henkel, C., Javanmardi, B., Martnez-Delgado, D., Kroupa, P., & Teuwen, K. 2017, A&A, 603, A18 Google Scholar
Ibata, R. A., Lewis, G. F., Conn, A. R., et al. 2013, Nature, 493, 62 CrossRefGoogle Scholar
Javanmardi, B., Martinez-Delgado, D., Kroupa, P., et al. 2016, A&A, 588, A89 Google Scholar
Jester, S., Schneider, D. P., Richards, G. T., et al. 2005, AJ, 130, 873 CrossRefGoogle Scholar
Karachentsev, I., Makarov, D.I., & Kaisina, E.I. 2013, AJ, 145, 101 CrossRefGoogle Scholar
McConnachie, A. W. 2012, AJ, 144, 4 CrossRefGoogle Scholar
Merritt, A., van Dokkum, P., & Abraham, R. 2014, ApJ (Letters), 787, L37 10.1088/2041-8205/787/2/L37CrossRefGoogle Scholar
Müller, O., Jerjen, H., & Binggeli, B. 2015, A&A, 583, A79 Google Scholar
Müller, O., Jerjen, H., & Binggeli, B. 2017a, A&A, 597, A7 Google Scholar
Müller, O., Scalera, R., Binggeli, B., & Jerjen, H. 2017b, A&A, 602, A119 —. 2018a, ArXiv e-prints, arXiv:1802.08657Google Scholar
Müller, O., Pawlowski, M. S., Jerjen, H., & Lelli, F. 2018b, Science, 359, 534 CrossRefGoogle Scholar
Muñoz, R. P., Eigenthaler, P., Puzia, T. H., et al. 2015, ApJ (Letters), 813, L15 CrossRefGoogle Scholar
Muñoz, R. R., Côté, P., Santana, F. A., et al. 2018a, ApJ, 860, 65 —. 2018b, ApJ, 860, 66CrossRefGoogle Scholar
Ordenes-Briceño, Y., Eigenthaler, P., Taylor, M. A., et al. 2018a, ApJ, 859, 52 10.3847/1538-4357/aaba70CrossRefGoogle Scholar
Park, H. S., Moon, D.-S., Zaritsky, D., et al. 2017, ApJ, 848, 19 10.3847/1538-4357/aa88abCrossRefGoogle Scholar
Pawlowski, M. S., Pflamm-Altenburg, J., & Kroupa, P. 2012, MNRAS, 423, 1109 10.1111/j.1365-2966.2012.20937.xCrossRefGoogle Scholar
Peng, C. Y., Ho, L. C., Impey, C. D., & Rix, H.-W. 2010, AJ, 139, 2097 CrossRefGoogle Scholar
Sánchez-Janssen, R., Ferrarese, L., MacArthur, L. A., et al. 2016, ApJ, 820, 69 10.3847/0004-637X/820/1/69CrossRefGoogle Scholar
Sérsic, J. L. 1963, Boletin de la Asociacion Argentina de Astronomia La Plata Argentina, 6, 41 Google Scholar
Smercina, A., Bell, E. F., Slater, C. T., et al. 2017, ApJ (Letters), 843, L6 10.3847/2041-8213/aa78faCrossRefGoogle Scholar
Taylor, M. A., Puzia, T. H., Muñoz, R. P., et al. 2017, MNRAS, 469, 3444 10.1093/mnras/stx1021CrossRefGoogle Scholar
Tully, R. B., Courtois, H. M., Dolphin, A. E., et al. 2013, AJ, 146, 86 CrossRefGoogle Scholar