Star Formation Thresholds in Low Surface Brightness Dwarf Galaxies
نویسندگان
چکیده
منابع مشابه
Star Formation in Massive Low Surface Brightness Galaxies
Massive low surface brightness galaxies have disk central surface brightnesses at least one magnitude fainter than the night sky, but total magnitudes and masses that show they are among the largest galaxies known. Like all low surface brightness (LSB) galaxies, massive LSB galaxies are often in the midst of star formation yet their stellar light has remained diffuse, raising the question of ho...
متن کاملThe Formation of Low Surface Brightness Galaxies
The formation of low surface brightness galaxies is an unavoidable prediction of any hierarchical clustering scenario. In these models, low surface brightness galaxies form at late times from small initial overdensities, and make up most of the faint end of the galaxy luminosity function. Because there are tremendous observational biases against finding low surface brightness galaxies, the obse...
متن کاملStar Formation in Dwarf Galaxies
We explore mechanisms for the regulation of star formation in dwarf galaxies. We concentrate primarily on a sample in the Virgo cluster, which has HI and blue total photometry, for which we collected Hα data at the Wise Observatory. We find that dwarf galaxies do not show the tight correlation of the surface brightness of Hα (a star formation indicator) with the HI surface density, or with the ...
متن کاملStar Formation in Galaxies with Large Lower Surface Brightness Disks
We present B, R, and Hα imaging data of 19 large disk galaxies whose properties are intermediate between classical low surface brightness galaxies and ordinary high surface brightness galaxies. We use data taken from the Lowell 1.8m Perkins telescope to determine the galaxies’ overall morphology, color, and star formation properties. Morphologically, the galaxies range from Sb through Irr and i...
متن کاملDWARF AND LOW SURFACE BRIGHTNESS GALAXIES Field Populations
The terms `dwarf' and `low surface brightness' are commonly used to mean a variety of di erent things, and are sometimes used interchangeably. It is thus necessary to explicitly quantify the de nitions which are adopted. Here I shall limit the discussion to eld galaxies which are [exponential] disks characterized by a scale size h and central surface brightness 0. The word dwarf implies things ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1999
ISSN: 0252-9211
DOI: 10.1017/s0252921100054440