ON THE BARYONIC CONTENTS OF LOW-MASS GALAXIES

Journal Article · Wed Aug 01 00:00:00 EDT 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/754/2/113· OSTI ID:22039234

Gnedin, Nickolay Y., E-mail: [e-mail] ^[1]

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1. Particle Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510 (United States)

The baryonic Tully-Fisher relation is an important observational constraint on cosmological and galactic models. However, it is critical to keep in mind that in observations only stars and molecular and atomic gas are counted, while the contribution of the ionized gas is almost universally missed. The ionized gas is, however, expected to be present in the gaseous disks of dwarf galaxies simply because they are exposed to the cosmic ionizing background and to the stellar radiation that manages to escape from the central regions of the galactic disks into their outer layers. Such an expectation is, indeed, born out both by cosmological numerical simulations and by simple analytical models.

• OSTI ID: 22039234
• Journal Information: Astrophysical Journal, Vol. 754, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTRONOMY
ASTROPHYSICS
BARYONS
COMPUTERIZED SIMULATION
COSMIC GASES
COSMOLOGICAL MODELS
GALAXIES
IONIZATION
LAYERS
MASS
STARS
STELLAR RADIATION