Next Article in Journal / Special Issue
Back to the Green Valley: How to Rejuvenate an S0 Galaxy through Minor Mergers
Previous Article in Journal / Special Issue
The CALIFA Survey: Exploring the Oxygen Abundance in the Local Universe
Article Menu

Export Article

Open AccessArticle
Galaxies 2015, 3(4), 184-191; doi:10.3390/galaxies3040184

Tidal Dwarf Galaxies: Disc Formation at \(z\simeq0\)

1
Department of Astronomy, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106,
2
Laboratoire AIM, CNRS, CEA/DSM, Université Paris Diderot, F-91191 Gif-sur-Yvette, France
3
Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield, AL10 9AB, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Alexei Moiseev, José Alfonso López Aguerri and Enrichetta Iodice
Received: 15 October 2015 / Revised: 28 October 2015 / Accepted: 2 November 2015 / Published: 5 November 2015
View Full-Text   |   Download PDF [804 KB, uploaded 12 November 2015]   |  

Abstract

Collisional debris around interacting and post-interacting galaxies often display condensations of gas and young stars that can potentially form gravitationally bound objects: Tidal Dwarf Galaxies (TDGs). We summarise recent results on TDGs, which are originally published in Lelli et al. (2015, A&A).We study a sample of six TDGs around three different interacting systems, using high-resolution HI observations from the Very Large Array. We find that the HI emission associated to TDGs can be described by rotating disc models. These discs, however, would have undergone less than one orbit since the time of the TDG formation, raising the question of whether they are in dynamical equilibrium. Assuming that TDGs are in dynamical equilibrium, we find that the ratio of dynamical mass to baryonic mass is consistent with one, implying that TDGs are devoid of dark matter. This is in line with the results of numerical simulations where tidal forces effectively segregate dark matter in the halo from baryonic matter in the disc, which ends up forming tidal tails and TDGs. View Full-Text
Keywords: interacting galaxies; peculiar galaxies interacting galaxies; peculiar galaxies
Figures

Figure 1

This 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. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Lelli, F.; Duc, P.-A.; Brinks, E.; McGaugh, S.S. Tidal Dwarf Galaxies: Disc Formation at \(z\simeq0\). Galaxies 2015, 3, 184-191.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Galaxies EISSN 2075-4434 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top