Near-infrared jets in the Galactic microquasar GRS1915+105
Article Abstract:
The Galactic microquasar GRS1915+105 emits near-infrared jets from the same position angle as radio jets. The luminosity of the near-infrared jets is more than that of radio jets and their lifetime is less than two years. The central source luminosity, jet brightness temperature and jet length are related. The emission of the jets are redshifted and the approaching and receding jets have a redshift of about 0.75 and 2.36 respectively. The total near-infrared magnitude of the southwest jet is more than the weakest magnitude of the total source. The near-infrared emissions are only partially polarized.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Obscured objects of desire
Article Abstract:
The apparent rarity of quasars in the earliest stages of the development of the Universe is attributed to the inability of instruments to detect them. BR1202-0725 is a quasar under extensive study. It lies at a redshift of 4.69, and its large masses of dust and carbon monoxide show that the primordial hydrogen and helium gas is enriched with heavier elements. However, instruments are unable to detect quasars beyond a redshift of 5. This limitation is overcome by the Submillimeter Common-User Bolometer Array and the Green Bank Telescope.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Hosts of possibilities
Article Abstract:
The Hubble Space Telescope (HST), used to study quasars, is unable to give information about many features seen while studying galaxies such as un-resolved knots which may be clusters of hot stars, the nuclei of merging galaxies and tidal tails. HST is unable to detect faint structures in the quasar host galaxies because the Wide-Field Planetary Camera 2 has a temporally and spatially variable point-spread function. However, it effectively removes the scattered and diffracted nuclear light from the host-galaxy images.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
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