2014AJ....148...41B

Query : 2014AJ....148...41B

2014AJ....148...41B - Astron. J., 148, 41 (2014/September-0)

A search for supernova remnants in NGC 6946 using the [Fe II] 1.64 µm line.

BRUURSEMA J., MEIXNER M., LONG K.S. and OTSUKA M.

Abstract (from CDS):

Shock models indicate and observations show that in the infrared (IR), supernova remnants (SNRs) emit strongly in [Fe II] at 1.64 µm. Here, we report the results of a search for SNRs in NGC 6946 relying on [Fe II] 1.64 µm line emission, where we employed an adjacent [Fe II]Off filter to accurately assess the local continuum levels. For this study, we used the WIYN High Resolution Infrared Camera on the WIYN 3.5 m telescope to image NGC 6946 in broadbands J and H and narrowbands [Fe II], [Fe II]Off, Paβ, and PaβOff. From our search, we have identified 48 SNR candidates (SNRcs), 6 of which are coincident with sources found in prior radio, optical, and/or X-ray studies. The measured [Fe II] fluxes of our SNRcs range from 1.5x10–16 to 4.2x10–15 erg/s/cm2 and are among the highest of previously published extragalactic SNR [Fe II] fluxes. All of the candidates now need to be confirmed spectroscopically. However, the fact that we detect as many objects as we did suggests that [Fe II] can be used as an effective search tool to find extragalactic SNRs.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual: NGC 6946 - ISM: supernova remnants

Nomenclature: Fig. 3, Table 4: [BML2014] NN (Nos 1-48).

Simbad objects: 60

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Number of rows : 60
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
3 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
5 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
6 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
7 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
8 [BML2014] 1 SR? 20 33 55.8408 +60 07 09.524           ~ 1 0
9 [BML2014] 2 SR? 20 33 59.4288 +60 07 04.635           ~ 1 0
10 [BML2014] 3 SR? 20 34 05.9472 +60 04 30.703           ~ 1 0
11 [BML2014] 4 SR? 20 34 17.3208 +60 07 43.101           ~ 1 0
12 [BML2014] 5 SR? 20 34 18.0552 +60 09 18.421           ~ 1 0
13 [BML2014] 6 SR? 20 34 18.3432 +60 11 50.410           ~ 1 0
14 [BML2014] 7 SR? 20 34 19.6200 +60 11 03.977           ~ 1 0
15 [BML2014] 8 SR? 20 34 27.3048 +60 05 52.565           ~ 1 0
16 [BML2014] 9 SR? 20 34 29.3616 +60 08 42.963           ~ 1 0
17 [BML2014] 10 SR? 20 34 30.8424 +60 07 18.711           ~ 1 0
18 [BML2014] 11 SR? 20 34 31.9920 +60 07 47.894           ~ 1 0
19 [BML2014] 12 SR? 20 34 34.8696 +60 07 03.139           ~ 1 0
20 [BML2014] 13 SR? 20 34 36.7392 +60 09 15.194           ~ 1 0
21 [HSH2003] 21 SNR 20 34 41.39 +60 08 46.3           ~ 9 0
22 [BML2014] 14 SR? 20 34 41.4696 +60 08 46.465           ~ 1 0
23 [BML2014] 15 SR? 20 34 42.5400 +60 08 37.525           ~ 1 0
24 [BML2014] 16 SR? 20 34 42.6552 +60 08 24.684           ~ 1 0
25 [BML2014] 17 SR? 20 34 42.8184 +60 08 49.445           ~ 1 0
26 [BML2014] 18 SR? 20 34 46.0992 +60 07 43.321           ~ 1 0
27 [BML2014] 19 SR? 20 34 49.5768 +60 07 39.476           ~ 1 0
28 [LDG97] 47 SNR 20 34 50.80 +60 07 47.9           ~ 6 0
29 [BML2014] 20 SNR 20 34 50.8152 +60 07 47.949           ~ 4 0
30 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
31 [BML2014] 21 SR? 20 34 54.3720 +60 11 55.712           ~ 1 0
32 [BML2014] 22 SR? 20 34 56.0544 +60 12 30.679           ~ 1 0
33 [SST2011] J203456.49+600834.1 UX? 20 34 56.49 +60 08 34.0           ~ 7 0
34 [BML2014] 23 SR? 20 34 56.8512 +60 08 32.595           ~ 1 0
35 [BML2014] 24 SR? 20 34 57.0480 +60 05 15.102           ~ 1 0
36 [BML2014] 25 SNR 20 34 57.80 +60 08 10.0           ~ 7 0
37 [BML2014] 26 SR? 20 34 58.3296 +60 08 17.901           ~ 1 0
38 [BML2014] 27 SR? 20 34 59.2512 +60 10 48.976           ~ 1 0
39 [BML2014] 28 SR? 20 34 59.7504 +60 08 41.906           ~ 1 0
40 NAME NGC 6946 SNR SNR 20 35 00.74 +60 11 30.6           ~ 117 0
41 [BML2014] 30 SR? 20 35 01.3248 +60 08 59.856           ~ 1 0
42 [BML2014] 31 SR? 20 35 01.3488 +60 08 21.814           ~ 1 0
43 [BML2014] 32 SR? 20 35 01.9128 +60 08 52.315           ~ 1 0
44 [BML2014] 33 SR? 20 35 03.8088 +60 06 19.331           ~ 1 0
45 [BML2014] 34 SR? 20 35 05.8224 +60 07 54.513           ~ 1 0
46 [HSH2003] 65 SNR 20 35 08.08 +60 11 13.1           ~ 9 0
47 [BML2014] 35 SR? 20 35 08.1456 +60 11 13.322           ~ 1 0
48 [BML2014] 36 SR? 20 35 08.7456 +60 07 55.076           ~ 1 0
49 [BML2014] 37 SR? 20 35 08.8248 +60 08 23.133           ~ 1 0
50 [BML2014] 38 SR? 20 35 10.1232 +60 09 15.029           ~ 1 0
51 [BML2014] 39 SR? 20 35 10.3056 +60 09 16.150           ~ 1 0
52 [BML2014] 40 SR? 20 35 12.0048 +60 08 52.329           ~ 1 0
53 [BML2014] 41 SR? 20 35 21.8640 +60 06 54.792           ~ 1 0
54 [BML2014] 42 SR? 20 35 26.4192 +60 08 16.706           ~ 1 0
55 [BML2014] 43 SR? 20 35 30.0000 +60 05 18.892           ~ 1 0
56 [BML2014] 44 SR? 20 35 30.64 +60 05 52.8           ~ 1 0
57 [BML2014] 45 SR? 20 35 31.5792 +60 11 13.945           ~ 1 0
58 [BML2014] 46 SR? 20 35 35.3400 +60 10 51.967           ~ 1 0
59 [BML2014] 47 SR? 20 35 38.4240 +60 07 16.899           ~ 1 0
60 [BML2014] 48 SR? 20 35 40.4952 +60 07 58.070           ~ 1 0

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