Millimeter-Wave Continuum Around NGC 7538-IRS1, IRS2, and IRS3
نویسندگان
چکیده
منابع مشابه
MPIfR 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 ...
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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 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 کاملInvestigating the Nature of the Dust Emission around Massive Protostar Ngc 7538 Irs 1: Circumstellar Disk and Outflow?
We have obtained high resolution mid-infrared images of the high mass protostar NGC 7538 IRS 1 using Michelle on Gemini North and find that the circumstellar dust associated with this source is extended on both large and small scales. The large-scale mid-infrared emission is asymmetric about the peak of IRS 1, being more extended to the northwest than the southeast. The position angle of the mi...
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: International Astronomical Union Colloquium
سال: 1994
ISSN: 0252-9211
DOI: 10.1017/s0252921100019692