The Best of Two Worlds: ALMA + IRAM30M Observations of the Orion Integral Shape Filament

Author(s)

Alvaro Hacar Gonzalez

Abstract

We have investigated the internal gas structure of the Orion Integral

Shape filament using two large-scale, 150-pointing ALMA-12m mosaics and

previous IRAM30m single-dish (SD) observations. From the combination of

both single-dish and interferometric data we have produced a

high-dynamic range and high-sensitivity map describing the internal gas

structure of this filament at scales between 2 pc and 2000 AU (Hacar et

al, submitted to A&A). In a series of individual CASA reductions

(w/o SD data + w/o feathering), we have investigated the impact of the

different uv-coverages on both the total flux and line velocity

structure of our ALMA maps. Our analysis highlights the critical role

played by the zero-spacing data at the different stages of the cleaning

process. The results of these ALMA+IRAM30m experiments emphasize the

need of high-sensitivity SD observations for the analysis of large-scale

interferometric maps. During my talk, I will discuss the implications of

these experiments on the dawn of the ALMA era and in the context of the

new AtLAST telescope.

Organisation(s)

Department of Astrophysics

External organisation(s)

Leiden University

Pages

11

DOI

https://doi.org/10.5281/zenodo.1159023

Publication date

01-2018

Peer reviewed

Yes

Austrian Fields of Science 2012

103004 Astrophysics

Keywords

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