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  • 1
    Electronic Resource
    Electronic Resource
    SOURCES OF RELATIVISTIC JETS IN THE GALAXY (1999)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Astronomy and Astrophysics 37 (1999), S. 409-443 
    Details
    ISSN: 0066-4146
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Notes: Abstract Black holes of stellar mass and neutron stars in binary systems are first detected as hard X-ray sources using high-energy space telescopes. Relativistic jets in some of these compact sources are found by means of multiwavelength observations with ground-based telescopes. The X-ray emission probes the inner accretion disk and immediate surroundings of the compact object, whereas the synchrotron emission from the jets is observed in the radio and infrared bands, and in the future could be detected at even shorter wavelengths. Black-hole X-ray binaries with relativistic jets mimic, on a much smaller scale, many of the phenomena seen in quasars and are thus called microquasars. Because of their proximity, their study opens the way for a better understanding of the relativistic jets seen elsewhere in the Universe. From the observation of two-sided moving jets it is inferred that the ejecta in microquasars move with relativistic speeds similar to those believed to be present in quasars. The simultaneous multiwavelength approach to microquasars reveals in short timescales the close connection between instabilities in the accretion disk seen in the X-rays, and the ejection of relativistic clouds of plasma observed as synchrotron emission at longer wavelengths. Besides contributing to a deeper understanding of accretion disks and jets, microquasars may serve in the future to determine the distances of jet sources using constraints from special relativity, and the spin of black holes using general relativity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.astro.37.1.409
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  • 2
    Electronic Resource
    Electronic Resource
    A double-sided radio jet from the compact Galactic Centre annihilator 1E1740.7–2942 (1992)
    [s.l.] : Nature Publishing Group
    Nature 358 (1992), S. 215-217 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] After the first observations with SIGMA, we initiated radio monitoring, at several wavelengths, of 1E1740.7-2942, the dominant hard X-ray source (&30keV) near the Galactic Centre4. The hard X-ray spectrum in its normal state resembles that of Cygnus X-l, one of the best candidates for ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/358215a0
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  • 3
    Electronic Resource
    Electronic Resource
    ANISOTROPIC MASS OUTFLOW IN REGIONS OF STAR FORMATION (1982)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 395 (1982), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1982.tb43393.x
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  • 4
    Electronic Resource
    Electronic Resource
    A superluminal source in the Galaxy (1994)
    [s.l.] : Nature Publishing Group
    Nature 371 (1994), S. 46-48 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the course of a general study of radio counterparts of /-ray sources we observed with the Very Large Array a remarkable ejection event in the transient source GRS1915+105 (ref. 6). After the observation of strong radio outbursts7'8, we have fol-lowed the large proper motions of a pair of bright ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/371046a0
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  • 5
    Electronic Resource
    Electronic Resource
    Microquasars in our Galaxy (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 392 (1998), S. 673-676 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Microquasars are stellar-mass black holes in our Galaxy that mimic, on a smaller scale, many of the phenomena seen in quasars. Their discovery opens the way for a new understanding of the connection between the accretion of matter onto black holes and the origin of the relativistic jets observed in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/33603
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  • 6
    Electronic Resource
    Electronic Resource
    Spherical episodic ejection of material from a young star (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 411 (2001), S. 277-280 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The exact processes by which interstellar matter condenses to form young stars are of great interest, in part because they bear on the formation of planets like our own from the material that fails to become part of the star. Theoretical models suggest that ejection of gas during early phases ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35077020
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  • 7
    Electronic Resource
    Electronic Resource
    Compact protoplanetary disks around the stars of a young binary system (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 395 (1998), S. 355-357 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Planet formation is believed to occur in the disks of gas and dust that surround young solar-type stars. Most stars, however, form in multiple systems, where the presence of a close companion could affect the structure of the disk and perhaps interfere with planet formation. It has been ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/26421
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  • 8
    Electronic Resource
    Electronic Resource
    Soft gamma-ray bursts from the superluminal source GRS 1915+105? (1995)
    Springer
    Astrophysics and space science 231 (1995), S. 65-68 
    Details
    ISSN: 1572-946X
    Keywords: Soft Gamma Ray Bursts ; Hard X-ray Transients ; Superluminal Sources
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The power required to eject relativistic plasma clouds in the hard X-ray transient GRS 1915+105 is at least 100 times the luminosity of the softϒ-ray bursts (SGRs) that were observed by BATSE from the same region of the sky in the year 1992. We show that there are spatial, time, and spectral coincidences between GRS 1915+105 and the SGRs observed by BATSE which suggest that they are one and the same source. However, the position of the SGRs is rather uncertain and until better positions are obtained, the question on the association of GRS 1915+105 with the SGRs must remain open.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00658589
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  • 9
    Electronic Resource
    Electronic Resource
    Molecular clouds around outflow sources (1990)
    Springer
    Astrophysics and space science 171 (1990), S. 161-162 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The (J, K)=(1,1) ammonia transition emission has been observed toward six regions with signs of active star formation (AFGL 5142, HH 33/40, AFGL 5157, AFGL 6366S, HHL 73, and S140N), using the 37 m antenna of the Haystack Observatory. We detected and mapped the ammonia emission in all of these sources with the exception of HH 33/40. The (J, K)-(2,2), ammonia transition was also observed at the peak position of each source in order to obtain the rotational temperature of the ammonia clumps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646838
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  • 10
    Electronic Resource
    Electronic Resource
    The Serpens Radio Jet: evidence of precession of nutation (1994)
    Springer
    Astrophysics and space science 216 (1994), S. 137-138 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Previous VLA observations of the triple radio continuum source in Serpens showed that it has very unusual and extraordinary characteristics. While this source is associated with a star forming region, its outer components exhibit a combination of thermal and nonthermal spectra and large proper motions, Furthermore, the NW lobe has knotty and extended emission connecting the central source with the bright outer knot. Here, we present results of new VLA radio continuum high-angular resolution observations of this Radio Jet. Combining these observations with those obtained previously, we find that: a) one of the knots along the main body of the radio jet (knot G) exhibits proper motions similar to those observed in the outer NW and SE components, and the time variable knot A; b) the outer knots are moving away from the central source in slightly different directions; and c) the orientation of the central source seems to change with time. These results are consistent with a central precessing source that undergoes periodic ejection of material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982482
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