منابع مشابه
Outflow Structures from the Young High-mass Star Ngc 7538 Irs1 Revealed by Near-infrared Bispectrum Speckle Interferometry
BISPECTRUM SPECKLE INTERFEROMETRY. S. Kraus ([email protected]), K.-H. Hofmann, Th. Preibisch, D. Schertl, G. Weigelt, Max-Planck-Institute for Radioastronomy, Auf dem Hügel 69, 53121 Bonn, Germany, M. Elitzur, Department of Physics & Astronomy, University of Kentucky, Lexington, KY 40506, USA, M. R. Pestalozzi, School of Physics, Astronomy and Mathematics, Univ. of Herfordshire, AL9 10A...
متن کاملMPIfR Molecular jet simulation with a large precession angle and its application to emission from NGC 7538 IRS1
Recent high resolution bispectrum speckle interferometric observations in the near-infrared have revealed that the area surrounding NGC 7538 IRS1 is associated with a fan-like region that contains several stars and regions of diffuse emission. An interpretation of the speckle, CO, radio continuum, and methanol maser data, which shows the current position angle of the protostar’s accretion disk ...
متن کاملOutflows from the high-mass protostars NGC 7538 IRS1/2 observed with bispectrum speckle interferometry Signatures of flow precession
Context. NGC 7538 IRS1 is a high-mass (30 M⊙) protostar with a CO outflow, an associated ultracompact H II region, and a linear methanol maser structure, which might trace a Keplerian-rotating circumstellar disk. The directions of the various associated axes are misaligned with each other. Aims. We investigate the near-infrared morphology of the source to clarify the relations among the various...
متن کاملMethane Abundance Variations toward the Massive Protostar Ngc 7538 Irs 9
Absorption and emission lines originating from the 3 C H stretching manifold of gas-phase CH4 were discovered in the high-resolution (R 1⁄4 25;000) infrared L-band spectrum along the line of sight toward NGC 7538 IRS 9. These observations provide a diagnostic of the complex dynamics and chemistry in a massive star-forming region. The line shapes resemble P Cygni profiles with the absorption and...
متن کاملSubmillimeter Imaging Polarimetry of the Ngc 7538 Region
Imaging polarimetry of the 850 km continuum emission in the NGC 7538 region, obtained with the SCUBA Polarimeter, is presented. The polarization map is interpreted in terms of thermal radiation by magnetically aligned dust grains. Two prominent cores associated with IRS 1 and IRS 11, IRS 1(SMM), and IRS 11(SMM), are found in the surface brightness map. Although these cores look similar in surfa...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2019
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201834948