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Topic: Sagittarius B2

    Note: these results are not from the primary (high quality) database.

Cloud Collision-Induced Star Formation in Sagittarius B2. I. Large-Scale Kinematics CO cloud consists of two components: a compact core of 3 pc in diameter roughly centered on Sgr B2 (M) and an extended plateau of 17 pc * 7.5 pc area containing the maser sources and most of the HII regions. We present maps of a 14 pc * 20 pc region covering the Sgr B2 molecular cloud complex in the The obtained intensity distributions are compared with those of molecular masers and compact HII regions reported in the literature. www.aoc.nrao.edu /~gcnews/gcnews/Vol.11/satofm@u-gakugei.ac.jp_sgrbpaper.tex.abs.shtml

Energy Citations Database (ECD) Document #6405566 - 1300 micron continuum observations of the Sagittarius B2 molecular cloud core Energy Citations Database (ECD) Document #6405566 - 1300 micron continuum observations of the Sagittarius B2 molecular cloud core 1300 micron continuum observations of the Sagittarius B2 molecular cloud core www.osti.gov /energycitations/product.biblio.jsp?osti_id=6405566

Astronomy - A sugary star cloud - Francis Reddy (09/21/2004) A stronomers have discovered a frigid reservoir of simple sugar molecules in Sagittarius B2, a molecular cloud complex located near the center of our Milky Way Galaxy, some 26,000 light-years away. The massive Sagittarius B2 cloud is a well-known source of complex molecules, including acetic acid (CH H), ethanol (C Shock waves ripple through the cloud, or nebula, as stars are born and die. www.astronomy.com /default.aspx?c=a&id=2468

Astronomical Society of Western Australia (Inc.) NUNKI is described in Burnham's as the brightest and the northernmost of the stars that outline the so-called "Milk Dipper" of Sagittarius, though this may be more familiar to many as the handle of the Teapot of Sagittarius. With an apparent magnitude of 2.12 and a spectral class of B2, Nunki's computed distance of about 300 light years gives it an actual luminosity some 1100 times greater than our Sun and an absolute magnitude of about -2.7. Citing the Babylonian Tablet of the Thirty Stars as a reference, Burnham goes on to state that the name probably came from the fact that the star heralds the approach of the "watery" constellations Capricornus, Aquarius and Pisces, as well as Cetus and Piscis Austrinus. www.aswa.info /nunki.html

Space Science Division Neufeld, D.A., M.L.N. Ashby, E.A. Bergin, G. Chin, N.R. Erickson, P.F. Goldsmith, M. Harwit, J.E. Howe, S.C. Kleiner, D.G. Koch, B.M. Patten, R. Plume, R. Schieder, R.L. Snell, J.R. Stauffer, V. Tolls, Z. Wang, G. Winnewisser, Y.F. Zhang, and G.J. Melnick ''Observations of Absorption by Water Vapor toward Sagittarius B2.'' Astrophys. Snell, R.L., J.E. Howe, M.L.N. Ashby, E.A. Bergin, G. Chin, N.R. Erickson, P.F. Goldsmith, M. Harwit, S.C. Kleiner, D.G. Koch, D.A. Neufeld, B.M. Patten, R. Plume, R. Schieder, J.R. Stauffer, V. Tolls, Z. Wang, G. Winnewisser, Y.F. Zhang, and G.J. Melnick ''Submillimeter Wave Astronomy Satellite Observations of Extended Water Emission in Orion.'' Astrophys. Howe, J.E., Ashby, M.L.N., Bergin, E.A., Chin, G., Erickson, N.R., Goldsmith, P.F., Harwit, M., Hollenbach, D.J., Kaufman, M.J., Kleiner, S.C., Koch, D.G., Neufeld, D.A., Patten, B.M., Plume, R., Schieder, R., Snell, R.L., Stauffer, J.R., Tolls, V., Wang, Z., Winnewisser, G., Zhang, Y.F., and Melnick, G.J. ''Extended [C I] and 13CO (5-->4) Emission in M17SW.'' Astrophys. www-space.arc.nasa.gov /2000_Citations.htm

USNO RECENT PUBLICATIONS De Pree, C. G., Goss, W. M., and Gaume, R. "Ionized Gas in Sagittarius B2 Main on Scales of 0.065 Arcsecond (600 AU)," Astrophys. Claussen, M. J, Frail, D. A., Goss, W. M, and Gaume, R. "Polarization Observations of the 1720 MHz OH Masers toward the Three Supernova Remnants W28, W44, and IC 443," Astrophys. Kirkpatrick, J. D., Cutri, R. M., Nelson, B., Beichman C. A., Reid, I. Liebert, J., Dahn, C. C., Monet, D. G., and Skrutskie, M. "Field Brown Dwarfs discovered by 2MASS and the Definition of a New Spectral Type Cooler than `M'," Bull. www.usno.navy.mil /library/libsource/PUBS97.HTML

NAM 2002 detailed programme Detection of HD in emission towards Sagittarius B2 Jonathan Rawlings (UCL) CO isotopes as a measure of the depletion due to freeze out in pre-stellar cores www.star.bris.ac.uk /nam/programme_details.html

Scientists Discover Two New Interstellar Molecules: Point to Probable Pathways for Chemical Evolution in Space The 8-atom molecule propenal and the 10-atom molecule propanal were detected in a large cloud of gas and dust some 26,000 light-years away in an area known as Sagittarius B2. Molecules with the aldehyde group are particularly interesting since several biologically significant molecules, including a family of sugar molecules, are aldehydes. An aldehyde is a molecule that contains the aldehyde group (CHO): a carbon atom singly bonded to a hydrogen atom and double-bonded to an oxygen atom; the remaining bond on that same carbon atom bonds to the rest of the molecule. www.nrao.edu /pr/2004/GBTMolecules

A Low-Frequency Atlas of the Galactic Center There are a number of prominent regions of star formation in the Milky Way's center including Sgr B1 and B2 and part of Sgr D. When hot stars run out of fuel, they collapse, producing massive explosions known as supernovae. Sagittarius, abbreviation Sgr.) Deep within Sgr A is the source Sgr A*, which astronomers have identified as possibly being a black hole with a mass millions of times that of the Sun. This panoramic view of the center of our Milky Way Galaxy is at a radio wavelength (color) of approximately 1 meter. rsd-www.nrl.navy.mil /7213/lazio/GC   (766 words)

NIST: Freq. Interstellar Molec. Micro. Trans. - Table Descrip. Most often the molecular cloud listed is Orion A (OriMC-1), Sagittarius B2 (SgrB2), Taurus Molecular Cloud 1 (TMC-1), or the circumstellar envelope of the infrared star IRC+10216, since these are the richest molecular sources and often provide the most intense emission lines. The chemical formula for each molecular species is given in column (2), the chemical name in column (3), and the quantum number labels are shown in column (4). In Table 1 and Table 2 the species are listed in alphabetic sequence according to empirical formula (Hill system) in the first column along with the common names of the molecule in the second column, and molecular formula in the third column. physics.nist.gov /PhysRefData/Micro/Html/sec3.html   (413 words)

Scientists Discover Two New Interstellar Molecules: Point to Probable Pathways for Chemical Evolution in Space The 8-atom molecule propenal and the 10-atom molecule propanal were detected in a large cloud of gas and dust some 26,000 light-years away in an area known as Sagittarius B2. "Interstellar molecules are identified by means of the frequencies that are unique to the rotational spectrum of each molecule," said Lovas. Such clouds, often many light-years across, are the raw material from which new stars are formed. www.nrao.edu /pr/2004/GBTMolecules   (898 words)

Astronomy - A sugary star cloud - Francis Reddy (09/21/2004) A stronomers have discovered a frigid reservoir of simple sugar molecules in Sagittarius B2, a molecular cloud complex located near the center of our Milky Way Galaxy, some 26,000 light-years away. Astronomers find a molecular cloud with a sweet filling. Nevertheless, the cold glycoaldehyde detections were surprisingly strong when compared to the original find, which hints that the cloud contains a considerable quantity of sugar. www.astronomy.com /default.aspx?c=a&id=2468   (898 words)

Scotsman.com News - Sci-Tech - Frozen sugar at centre of Milky Way Molecules of a simple sugar, glycolaldehyde, were detected in a cloud of gas and dust called Sagittarius B2 about 26,000 light years away. The clouds, which are often many light years across, provide the raw material from which new stars and planets are formed. ASTRONOMERS have found a cloud of frozen sugar near the centre of our galaxy, the Milky Way, it was revealed yesterday. news.scotsman.com /scitech.cfm?id=1109672004   (898 words)

Geoff Blake / Caltech / Publications [64] "HCl Absorption Toward Sagittarius B2" J. Zmuidzinas, Geoffrey A. Blake, John Carlstrom, Jocelyn Keene, & David Miller 1995, Ap.J.(Letters) 447, L125. [122] ``A Theoretical Study of the Conversion of Gas Phase Methanediol to Formaldehyde'' David R. Kent IV, Susanna L. Widicus, Geoffrey A.Blake, and William A. Goddard III 2003, J. [128] ``The Millimeter and Submillimeter Rotational Spectrum of 1,3-Dihydroxyacetone'' Susanna L. Widicus, Rogier Braakman, David R. Kent, and Geoffrey A. Blake 2004, J. www.gps.caltech.edu /~gab/publications/publications.html   (5159 words)

CH<sub>2</sub>OHCHO Interstellar propenal and propanal were detected in emission toward the Galactic center source Sagittarius B2(N) with the 100 m Green Bank Telescope (GBT) by means of centimeter-wave rotational transitions. www.cv.nrao.edu /%7Eawootten/ch2chcho.html   (5159 words)

[No title] LETTERS - Detection of HD in emission towards Sagittarius B2 Two short-period Saturnian companions to HD 108147 and HD 168746 FORMATION, STRUCTURE AND EVOLUTION OF STARS- Phase-resolved X-ray and optical spectroscopy of the massive binary HD 93403 www.lib.hokudai.ac.jp /cgi-bin/opac/swets/contents-query?smode=0&key=&zcode=30003795&issn=00046361&vol=00388&issue=00002&part=&year=0   (5159 words)

A&A Vol. 388 No. 2 Detection of HD in emission towards Sagittarius B2 p. Phase-resolved X-ray and optical spectroscopy of the massive binary HD 93403 p. The CORALIE survey for southern extra-solar planets VII - Two short-period Saturnian companions to HD 108147 and HD 168746 p. www.edpsciences.org /articles/aa/abs/2002/23/contents/contents.html   (5159 words)

A&A Vol. 388 No. 2 Detection of HD in emission towards Sagittarius B2 p. The CORALIE survey for southern extra-solar planets VII - Two short-period Saturnian companions to HD 108147 and HD 168746 p. Radio lobe dynamics and the environment of microquasars p. www.edpsciences.org /articles/aa/abs/2002/23/contents/contents.html   (5159 words)

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