Dzib, SA and Yang, AY and Urquhart, JS and Medina, S-NX and Brunthaler, A and Menten, KM and Wyrowski, F and Cotton, WD and Dokara, R and Ortiz-León, GN and Rugel, MR and Nguyen, H and Gong, Y and Chakraborty, A and Beuther, H and Billington, SJ and Carrasco-Gonzalez, C and Csengeri, T and Hofner, P and Ott, J and Pandian, JD and Roy, N and Yanza, V (2023) A global view on star formation: The GLOSTAR Galactic plane survey: I. Overview and first results for the Galactic longitude range 28° < l < 36. In: Astronomy and Astrophysics, 670 .
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Abstract
Aims. Surveys of the Milky Way at various wavelengths have changed our view of star formation in our Galaxy considerably in recent years. In this paper we give an overview of the GLOSTAR survey, a new survey covering large parts (145 square degrees) of the northern Galactic plane using the Karl G. Jansky Very Large Array in the frequency range 4-8 GHz and the Effelsberg 100-m telescope. This provides for the first time a radio survey covering all angular scales down to 1.5 arcsecond, similar to complementary near-IR and mid-IR galactic plane surveys. We outline the main goals of the survey and give a detailed description of the observations and the data reduction strategy. Methods. In our observations we covered the radio continuum in full polarization, as well as the 6.7 GHz methanol maser line, the 4.8 GHz formaldehyde line, and seven radio recombination lines. The observations were conducted in the most compact D configuration of the VLA and in the more extended B configuration. This yielded spatial resolutions of 18″ and 1.5″ for the two configurations, respectively. We also combined the D configuration images with the Effelsberg 100-m data to provide zero spacing information, and we jointly imaged the D- and B-configuration data for optimal sensitivity of the intermediate spatial ranges. Results. Here we show selected results for the first part of the survey, covering the range of 28° < l < 36° and |b|< 1°, including the full low-resolution continuum image, examples of high-resolution images of selected sources, and the first results from the spectral line data.
| Item Type: | Journal Article |
|---|---|
| Publication: | Astronomy and Astrophysics |
| Publisher: | EDP Sciences |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Astrophysics; Giant stars, Angular resolution; Catalog; Galactic plane; Global view; H II regions; Radio continuum: general; Radio sources; Stars formation; Technique: interferometric; Very large arrays, Radio astronomy |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 16 Feb 2023 04:17 |
| Last Modified: | 16 Feb 2023 04:17 |
| URI: | https://eprints.iisc.ac.in/id/eprint/80289 |
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