2019A&A...627A.175M


Query : 2019A&A...627A.175M

2019A&A...627A.175M - Astronomy and Astrophysics, volume 627A, 175-175 (2019/7-2)

GLOSTAR: Radio Source Catalog. I. 28° < l < 36° and |b| < 1°.

MEDINA S.-N.X., URQUHART J.S., DZIB S.A., BRUNTHALER A., COTTON B., MENTEN K.M., WYROWSKI F., BEUTHER H., BILLINGTON S.J., CARRASCO-GONZALEZ C., CSENGERI T., GONG Y., HOFNER P., NGUYEN H., ORTIZ-LEON G.N., OTT J., PANDIAN J.D., ROY N., SARKAR E., WANG Y. and WINKEL B.

Abstract (from CDS):

Context. Radio continuum surveys of the Galactic plane are an excellent way to identify different source populations such as planetary nebulae, HII 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°<l<85° and |b|<1° with unprecedented sensitivity in both flux density (~=40µJy/beam) 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°<l<36° and |b|<1°). This map has a resolution of 18'' and a sensitivity of ∼60-150µJy/beam. Methods. We present data acquired in 40h of observations with the VLA in D-configuration. Two 1GHz wide sub-bands were observed simultaneously and they were centered at 4.7 and 6.9GHz. 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 HII 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 HII regions in this part of the Galaxy by a factor of four.

Abstract Copyright: © S.-N. X. Medina et al. 2019

Journal keyword(s): surveys - radiation mechanisms: thermal - radio continuum: general - stars: formation - techniques: interferometric - radiation mechanisms: non-thermal

VizieR on-line data: <Available at CDS (J/A+A/627/A175): table7.dat table2.dat table5.dat fits/* fig17/*>

Nomenclature: Table 7: GLOSTAR GLLL.lll+BB.bbb N=1575.

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2820 2
2 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4351 2
3 QSO B1801+010 QSO 18 04 15.9844623720 +01 01 32.407105836     19.00 17.32   ~ 83 1
4 PSR B1842-04 Psr 18 45 34.709 -04 34 29.80           ~ 36 0
5 [RM2010] SFC 17 SFR 18 47 15 -02 05.7           ~ 2 0
6 PSR B1844-04 Psr 18 47 22.8222581784 -04 02 13.031112264           ~ 111 0
7 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 531 0
8 PSR J1850-0026 Psr 18 50 14.714 -00 26 11.60           ~ 18 1
9 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 506 0
10 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 965 2
11 GAL 034.8-00.6 Cld 18 56 47 +01 22.1           ~ 8 0
12 [RM2010] SFC 23 SFR 19 01 19 +04 45.6           ~ 2 0

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