J/A+A/558/A81 NGC 7538 IRS1 maps in CH3OH, HCN and HCO+ (Beuther+, 2013)
Fragmentation, infall and outflow around the showcase massive protostar
NGC 7538 IRS1 at 500AU resolution.
Beuther H., Linz H., Henning T.
<Astron. Astrophys. 558, A81 (2013)>
=2013A&A...558A..81B 2013A&A...558A..81B
ADC_Keywords: Infrared sources ; Millimetric/submm sources ; Interferometry
Keywords: stars: formation - stars: early-type -
stars: individual: NGC 7538 IRS1 - stars: massive
Abstract:
Revealing the fragmentation, infall, and outflow processes in the
immediate environment around massive young stellar objects is crucial
for understanding the formation of the most massive stars.
With this goal in mind we present the so far highest
spatial-resolution thermal submm line and continuum observations
toward the young high-mass protostar NGC 7538 IRS1. Using the
Plateau de Bure Interferometer in its most extended configuration at
843um wavelength, we achieved a spatial resolution of 0.2"x0.17",
corresponding to ∼500AU at a distance of 2.7kpc.
Description:
NGC 7538 IRS1 was observed, together with NGC 7538S, in a
shared-track mode in A configuration on February 27, 2012, with the
PdBI at 843um in its most extended configuration.
Objects:
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RA (2000) DE Designation(s)
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23 13 45.4 +61 28 12 NGC 7538 IRS1 = [WBN74] NGC 7538 IRS1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 147 7 List of FITS maps
maps/* . 7 Individual FITS maps
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 F4.2 arcsec/pix Scale [0.03] Scale of the image
25- 27 I3 pix Nx [512] Number of pixels along X-axis
28 A1 --- --- [x]
29- 31 I3 pix Ny [512] Number of pixels along Y-axis
33- 35 I3 km/s dvl ? Lower value of velocity interval
37- 39 I3 km/s dvu ? Upper value of velocity interval
41- 45 A5 --- Mol Molecule (cont for continuum)
47- 80 A34 --- FileName Name of FITS file in subdirectory maps
82-147 A66 --- Title Title of the file
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Acknowledgements:
Henrik Beuther, beuther(at)mpia-hd.mpg.de
(End) Patricia Vannier [CDS] 08-Oct-2013