منابع مشابه
Galaxies at High Redshifts
Several conclusions have been reached over the last few years concerning high-redshift galaxies: (1) The excess of faint blue galaxies is due to dwarf galaxies. (2) Star formation peaks at redshifts z ≈ 1 − 2. (3) It appears to occur piecemeal in any given galaxy and there is no evidence for starbursting throughout a large ∼ 10 kpc galaxy. (4) There is significant and sharp diminution in the nu...
متن کاملConstraints on the prevalence of luminous , dusty starbursts at very high redshifts
Constraints on the prevalence of luminous, dusty starbursts at very high redshifts Abstract. At a conference devoted to ever deeper surveys hunting for ever more distant galaxies, I posed a question for which a concensus view has been difficult to reach: 'Is there evidence for, or can we rule out, a significant population of dust-obscured starbursts at z > 3?' If, as seems likely, submm-selecte...
متن کاملRed Quasars Not so Dusty
Webster et al (1995) claimed that up to 80% of QSOs may be obscured by dust. They inferred the presence of this dust from the remarkably broad range of B?K optical-infrared colours of a sample of at-spectrum PKS radio QSOs. If such dust is typical of QSOs, it will have rendered invisible most of those which would otherwise been have detected by optical surveys. We used the William Herschel Tele...
متن کاملHerschel ⋆ - ATLAS : Properties of dusty massive galaxies at low and high redshifts
We present a comparison of the physical properties of a rest-frame 250μm selected sample of massive, dusty galaxies from 0 < z < 5.3. Our sample comprises 29 highredshift submillimetre galaxies (SMGs) from the literature, and 843 dusty galaxies at z < 0.5 from the Herschel -ATLAS, selected to have a similar stellar mass to the SMGs. The z > 1 SMGs have an average SFR of 390 −70M⊙yr −1 which is ...
متن کاملAccretion of gaseous disks at high redshifts and the depolarization asymmetry of radio-loud quasars
Anew scenario is explored to understand the striking depolarization asymmtery observed between the two lobes of powerful radio sources exhibiting one-sided jets. According to this tight correlation, commonly known as theLaing-Garrington effect, the lobe on the counter-jet side is found to depolarize more rapidly at longer radio wavelengths, compared to the opposite lobe. Conventionally, this is...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2016
ISSN: 1538-4357
DOI: 10.3847/0004-637x/828/1/43