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  GLOSTAR: Radio Source Catalog I. 28¬∞ < ‚Ñì < 36¬∞ and |b| < 1¬∞

Medina, S.-.-N.-X., Urquhart, J. S., Dzib, S. A., Brunthaler, A., Cotton, B., Menten, K. M., et al. (2019). GLOSTAR: Radio Source Catalog I. 28° < ℓ < 36° and |b| < 1°. Astronomy and Astrophysics, 627.

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Medina, S. -N. X.1, Author
Urquhart, J. S.1, Author
Dzib, S. A.1, Author
Brunthaler, A.1, Author
Cotton, B.1, Author
Menten, K. M.1, Author
Wyrowski, F.1, Author
Beuther, H.1, Author
Billington, S. J.1, Author
Carrasco-Gonzalez, C.1, Author
Csengeri, T.1, Author
Gong, Y.1, Author
Hofner, P.1, Author
Nguyen, H.1, Author
Ortiz-León, G. N.1, Author
Ott, J.1, Author
Pandian, J. D.1, Author
Roy, N.1, Author
Sarkar, E.1, Author
Wang, Y.1, Author
Winkel, B.1, Author more..
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              


Free keywords: surveys radiation mechanisms: thermal radio continuum: general stars: formation techniques: interferometric radiation mechanisms: non-thermal Astrophysics - Astrophysics of Galaxies Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Solar and Stellar Astrophysics
 Abstract: Context. Radio continuum surveys of the Galactic plane are an excellent way to identify different source populations such as planetary nebulae, H II regions, and radio stars and characterize their statistical properties. The Global View of Star Formation in the Milky Way (GLOSTAR) survey will study the star formation in the Galactic plane between -2¬∞ &lt; ‚Ñì &lt; 85¬∞ and |b| &lt; 1¬∞ with unprecedented sensitivity in both flux density (~40 ŒºJy beam-1) and range ofangular scales (~1".5 to the largest radio structures in the Galaxy).
Aims: In this paper we present the first results obtained from a radio continuum map of a 16-square-degree-sized region of the Galactic plane centered on ℓ = 32° and b = 0° (28° &lt; ℓ &lt; 36° and |b| &lt; 1°). This map has a resolution of 18″ and a sensitivity of ~60-150 μJy beam-1.
Methods: We present data acquired in 40 h of observations with the VLA in D-configuration. Two 1 GHz wide sub-bands were observed simultaneously and they were centered at 4.7 and 6.9 GHz. These data were calibrated and imaged using the Obit software package. The source extraction was performed using the BLOBCAT software package and verified through a combination of visual inspection and cross-matching with other radio and mid-infrared surveys.
Results: The final catalog consists of 1575 discrete radio sources and 27 large scale structures (including W43 and W44). By cross-matching with other catalogs and calculating the spectral indices (S(ν) ∝ να), we have classified 231 continuum sources as H II regions, 37 as ionization fronts, and 46 as planetary nebulae. The longitude and latitude distribution and negative spectral indices are all consistent with the vast majority of the unclassified sources being extragalactic background sources.
Conclusions: We present a catalog of 1575 radio continuum sources and discuss their physical properties, emission nature, and relation to previously reported data. These first GLOSTAR results have increased the number of reliable H II regions in this part of the Galaxy by a factor of four. Full version of Table 7 and data from Figs. 7, 9, and 17 are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr/">http://cdsarc.u-strasbg.fr</A> ( or via <A href="http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/627/A175">http://cdsarc.u-strasbg.fr/viz- bin/qcat?J/A+A/627/A175</A>


 Dates: 2019
 Publication Status: Issued
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Title: Astronomy and Astrophysics
Source Genre: Journal
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Pages: - Volume / Issue: 627 Sequence Number: - Start / End Page: - Identifier: -