J/A+A/587/A47      SMA 1.3mm image of OMC 1 North              (Teixeira+, 2016)

Two-level hierarchical fragmentation in the northern filament of the Orion Molecular Cloud 1. Teixeira P.S., Takahashi S., Zapata L.A., Ho P.T.P. <Astron. Astrophys. 587, A47 (2016)> =2016A&A...587A..47T 2016A&A...587A..47T (SIMBAD/NED BibCode)
ADC_Keywords: Molecular clouds ; Radio sources Keywords: techniques: interferometric - stars: formation - ISM: clouds - ISM: structure - stars: protostars - submillimeter: ISM Abstract: The filamentary structure of molecular clouds may set important constraints on the mass distribution of stars forming within them. It is therefore important to understand which physical mechanism dominates filamentary cloud fragmentation and core formation. Orion A is the nearest giant molecular cloud, and its so-called S-shaped filament is a very active star-forming region that is a good target for such a study. We have recently reported on the collapse and fragmentation properties of the northernmost part of this structure, located ∼2.4pc north of Orion KL - Orion Molecular Cloud (OMC) 3. As part of our project to study the S-shaped filament, we analyze the fragmentation properties of the northern OMC 1 filament (located ≲0.3pc north of Orion KL). This filament is a dense structure previously identified by JCMT/SCUBA submillimeter continuum and VLA NH3 observations and was shown to have fragmented into clumps. Our aim is to search for cores and young protostars embedded within OMC 1n and to study how the filament is fragmenting to form them. We observed OMC 1North (hereafter OMC 1n) with the Submillimeter Array (SMA) at 1.3mm and report on our analysis of the continuum data. Description: We observed OMC 1n using the eight 6m antennas of the SMA1 in the compact configuration on December 4, 20, and 24, 2008 (2007B-S028, P.I.: L. Zapata) and in the subcompact configuration on February 1, 2009 (2008B-S072, P.I.: L. Zapata) at 230GHz. The primary beam at this frequency is 55", and the nine pointing centers were distributed in a Nyquist-sampled grid. Objects: ----------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------- 05 35 14.5 -05 22 07 OMC 1n = NAME OMC 1N ----------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file list.dat 114 1 Informations of fits image map.fits 2880 5426 Fits image -------------------------------------------------------------------------------- Byte-by-byte Description of file: list.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.4 deg RAdeg Lower value of right ascension interval (J2000) 9- 15 F7.4 deg B_RA Upper value of right ascension interval 17- 24 F8.5 deg DEdeg Lower value of declination interval (J2000) 26- 33 F8.5 deg B_DE Upper value of declination interval 35- 38 I4 --- Nx Number of pixels along X-axis 40- 43 I4 --- Ny Number of pixels along Y-axis 45- 65 A21 --- Obs.Date Observation date 67- 77 E11.6 m/s Vlsr LSR velocity 79- 83 I5 Kibyte size Size of FITS file 85- 92 A8 --- FileName Name of FITS file 94-114 A21 --- Title Title of the FITS file -------------------------------------------------------------------------------- Acknowledgements: Paula Teixeira, paula.teixeira(at)univie.ac.at
(End) Patricia Vannier [CDS] 24-Feb-2016
The document above follows the rules of the Standard Description for Astronomical Catalogues; from this documentation it is possible to generate f77 program to load files into arrays or line by line