Tidal Dwarf Galaxies and Missing Baryons
Author
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-10-26
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Tidal dwarf galaxies form during the interaction, collision, or merger of massive spiral galaxies.
They can resemble “normal” dwarf galaxies in terms of mass, size, and become dwarf satellites orbiting around their massive progenitor.
They nevertheless keep some signatures from their origin, making them interesting targets for cosmological studies.
In particular, they should be free from dark matter from a spheroidal halo.
Flat rotation curves and high dynamical masses may then indicate the presence of an unseen component, and constrain the properties of the “missing baryons,” known to exist but not directly observed.
The number of dwarf galaxies in the Universe is another cosmological problem for which it is important to ascertain if tidal dwarf galaxies formed frequently at high redshift, when the merger rate was high, and many of them survived until today.
In this paper, “dark matter” is used to refer to the nonbaryonic matter, mostly located in large dark halos, that is, CDM in the standard paradigm, and “missing baryons” or “dark baryons” is used to refer to the baryons known to exist but hardly observed at redshift zero, and are a baryonic dark component that is additional to “dark matter”.
American Psychological Association (APA)
Bournaud, Frederic. 2009. Tidal Dwarf Galaxies and Missing Baryons. Advances in Astronomy،Vol. 2010, no. 2010, pp.1-7.
https://search.emarefa.net/detail/BIM-494477
Modern Language Association (MLA)
Bournaud, Frederic. Tidal Dwarf Galaxies and Missing Baryons. Advances in Astronomy No. 2010 (2010), pp.1-7.
https://search.emarefa.net/detail/BIM-494477
American Medical Association (AMA)
Bournaud, Frederic. Tidal Dwarf Galaxies and Missing Baryons. Advances in Astronomy. 2009. Vol. 2010, no. 2010, pp.1-7.
https://search.emarefa.net/detail/BIM-494477
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-494477