منابع مشابه
The age of blue LSB galaxies
Context. Low metallicities, large gas-to-star mass ratios, and blue colors of most low surface brightness (LSB) galaxies imply that these systems may be younger than their high surface brightness counterparts. Aims. We seek to find observational signatures that can help to constrain the age of blue LSB galaxies. Methods. We use numerical hydrodynamic modelling to study the long-term (∼ 13 Gyr) ...
متن کاملGas-rich LSB Galaxies – Progenitors of Blue Compact Dwarfs?
We analyze deep CCD images of nearby Blue Compact Dwarf (BCD) galaxies in an attempt to understand the nature of the progenitors which are hosting the current burst of star formation. In particular, we ask whether BCDs are hosted by normal or low-surface-brightness dI galaxies. We conclude that BCDs are in fact hosted by gas-rich galaxies which populate the extreme high-central-mass-density end...
متن کاملThe Chemical Evolution of LSB Galaxies
We have derived oxygen and nitrogen abundances of a sample of late-type, low surface brightness (LSB) galaxies found in the Sloan Digital Sky Survey (SDSS). Furthermore, we have computed a large grid (5000 models) of chemical evolution models (CEMs) testing various time-scales for infall, baryon densities and several power-law initial mass functions (IMFs) as well. Because of the rather stable ...
متن کاملLSB Galaxies and the Tully-Fisher Relation
We present Very Large Array (VLA) Hi imaging of four low surface brightness (LSB) galaxies ([OBC97] P01-3, [OBC97] C06-1, [OBC97] C04-1, [OBC97] C04-2)1 which were thought to strongly deviate from the Tully-Fisher (TF) relation based on Arecibo singledish observations. We do not detect three of the four targeted LSB galaxies in Hi down to a 4σ limit of 0.08Jy km s−1. We find that two of the fou...
متن کاملSurface photometry of LSB edge-on galaxies
We present results of surface photometry for eleven edge-on galaxies observed with the 6-m telescope at the Special Astrophysical Observatory of the Russian Academy of Sciences. The photometric scale length, the scale height, and the central surface brightness of the stellar disks for the galaxies were found using photometric cuts made parallel to the major and the minor axes for each galaxy. W...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200810320