2023A&A...671A.145D


Query : 2023A&A...671A.145D

2023A&A...671A.145D - Astronomy and Astrophysics, volume 671A, 145 (2023/3-1)

A global view on star formation: The GLOSTAR Galactic plane survey VII. Supernova remnants in the Galactic longitude range 28° < l < 36°.

DOKARA R., GONG Y., REICH W., RUGEL M.R., BRUNTHALER A., MENTEN K.M., COTTON W.D., DZIB S.A., KHAN S., MEDINA S.-N.X., NGUYEN H., ORTIZ-LEON G.N., URQUHART J.S., WYROWSKI F., YANG A.Y., ANDERSON L.D., BEUTHER H., CSENGERI T., MULLER P., OTT J., PANDIAN J.D. and ROY N.

Abstract (from CDS):

Context. While over 1000 supernova remnants (SNRs) are estimated to exist in the Milky Way, only less than 400 have been found to date. In the context of this apparent deficiency, more than 150 SNR candidates were recently identified in the D-configuration Very Large Array (VLA-D) continuum images of the 4-8 GHz global view on star formation (GLOSTAR) survey, in the Galactic longitude range -2° < l < 60°.
Aims. We attempt to find evidence of nonthermal synchrotron emission from 35 SNR candidates in the region of Galactic longitude range 28° < l < 36°, and also to study the radio continuum emission from the previously confirmed SNRs in this region.
Methods. Using the short-spacing corrected GLOSTAR VLA-D+Effelsberg images, we measure the ∼6 GHz total and linearly polarized flux densities of the SNR candidates and the SNRs that were previously confirmed. We also attempt to determine the spectral indices by measuring flux densities from complementary Galactic plane surveys and from the temperature-temperature plots of the GLOSTAR-Effelsberg images.
Results. We provide evidence of nonthermal emission from four candidates that have spectral indices and polarization consistent with a SNR origin, and, considering their morphology, we are confident that three of these (g28.36+0.21, G28.78-0.44, and G29.38+0.10) are indeed SNRs. However, about 25% of the candidates (8 out of 35) have spectral index measurements that indicate thermal emission, and the rest of them are too faint to have a good constraint on the spectral index yet.
Conclusions. Additional observations at longer wavelengths and higher sensitivities will shed more light on the nature of these candidates. A simple Monte Carlo simulation reiterates the view that future studies must persist with the current strategy of searching for SNRs with small angular size to solve the problem of the Milky Way's missing SNRs.

Abstract Copyright: © The Authors 2023

Journal keyword(s): ISM: supernova remnants - radio continuum: ISM - polarization - surveys

Simbad objects: 52

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Number of rows : 52
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 SNR G181.1+09.5 SNR 06 26 45.5 +32 31 00           ~ 14 0
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14463 0
3 GLOSTAR G028.870+00.616 SR? 18 41 49.4 -03 19 58           ~ 2 0
4 SNR G028.36+00.21 SR? 18 42 20 -03 58.3           ~ 3 0
5 GLOSTAR G028.524+00.268 SR? 18 42 25.8 -03 47 59           ~ 2 0
6 SNR G028.88+00.41 SR? 18 42 35 -03 25.1           ~ 4 0
7 SNR G028.21+00.02 SR? 18 42 44 -04 11.5           ~ 4 0
8 SNR G028.33+00.06 SR? 18 42 49 -04 04.0           ~ 4 0
9 SNR G028.64+00.20 SR? 18 42 53 -03 43.7           ~ 5 0
10 SNR G028.22-00.09 SR? 18 43 08 -04 14.2           ~ 4 0
11 GLOSTAR G028.877+00.241 SR? 18 43 10.4 -03 29 53           ~ 2 0
12 SNR G028.92+00.26 SR? 18 43 11 -03 27.1           ~ 3 0
13 GLOSTAR G028.929+00.254 SR? 18 43 13.3 -03 26 45           ~ 2 0
14 SNR G028.56+00.00 SR? 18 43 28 -03 53.2           ~ 7 0
15 GLOSTAR G029.329+00.280 SR? 18 43 51.7 -03 04 42           ~ 2 0
16 SNR G028.6-00.1 Rad 18 43 55 -03 53.0           ~ 57 1
17 GLOSTAR G030.362+00.623 SR? 18 44 31.8 -02 00 09           ~ 2 0
18 SNR G029.38+00.10 SR? 18 44 36 -03 06.9           ~ 4 0
19 SNR G029.6+00.1 Rad 18 44 52 -02 56.5           ~ 56 1
20 GLOSTAR G030.508+00.574 SR? 18 44 58.2 -01 53 42           ~ 2 0
21 SNR G029.92+00.21 SR? 18 45 12 -02 35.1           ~ 3 0
22 GLOSTAR G030.375+00.424 SR? 18 45 15.7 -02 04 55           ~ 2 0
23 SNR G028.78-00.44 SR? 18 45 25 -03 53.6           ~ 7 0
24 SNR G029.41-00.18 SR? 18 45 39 -03 13.0           ~ 4 0
25 GLOSTAR G030.303+00.128 SR? 18 46 11.1 -02 16 52           ~ 2 0
26 SNR G029.7-00.2 SNR 18 46 22.8 -02 59 47           ~ 351 2
27 SNR G031.44+00.36 SR? 18 47 26 -01 09.8           ~ 3 0
28 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 531 0
29 SNR G031.22-00.02 SR? 18 48 23 -01 32.0           ~ 4 0
30 GLOSTAR G031.256-00.041 SR? 18 48 31.6 -01 30 37           ~ 3 0
31 SNR G031.93+00.16 SR? 18 49 01 -00 48.5           ~ 4 0
32 3C 391.0 BL? 18 49 16.3 -00 55 01           ~ 352 2
33 SNR G032.5+00.1 SNR 18 50 05.000 -00 25 00.00           ~ 50 1
34 SNR G032.73+00.15 SR? 18 50 32 -00 06.7           ~ 3 0
35 SNR G032.22-00.21 SR? 18 50 53 -00 43.8           ~ 6 0
36 GLOSTAR G032.458-00.112 SR? 18 50 58.3 -00 28 22           ~ 2 0
37 SNR G031.5-00.6 Rad 18 51.2 -01 31           ~ 32 1
38 4C -00.73 Rad 18 51 46.9 -00 03 19           ~ 100 1
39 SNR G032.37-00.51 SR? 18 52 14 -00 44.0           ~ 4 0
40 SNR G033.6+00.1 SNR 18 52 29.000 +00 38 42.00           ~ 285 1
41 SNR G033.85+00.06 SR? 18 52 54 +00 50.6           ~ 3 0
42 SNR G032.1-00.9 SNR 18 53 10 -01 08.0           ~ 27 0
43 SNR G033.62-00.23 SR? 18 53 31 +00 30.4           ~ 3 0
44 GLOSTAR G034.619+00.240 SR? 18 53 39.7 +01 36 39           ~ 2 0
45 SNR G033.2-00.6 gam 18 53 41.1 -00 02 20           ~ 52 1
46 SNR G034.93-00.24 SR? 18 55 57 +01 40.2           ~ 4 0
47 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 965 2
48 GLOSTAR G035.129-00.343 SR? 18 56 40.1 +01 47 56           ~ 2 0
49 GLOSTAR G034.524-00.761 SR? 18 57 03.1 +01 04 11           ~ 2 0
50 SNR G035.6-00.4 Rad 18 57 55 +02 13.0           ~ 47 1
51 NAME Cyg X BL? 20 30 04.7973633 +40 51 36.002197           ~ 848 1
52 NAME Sct-Cen PoG ~ ~           ~ 231 0

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