2011ApJS..194...30L

Query : 2011ApJS..194...30L

2011ApJS..194...30L - Astrophys. J., Suppl. Ser., 194, 30 (2011/June-0)

A survey of molecular hydrogen in the Crab nebula.

LOH E.D., BALDWIN J.A., CURTIS Z.K., FERLAND G.J., O'DELL C.R., FABIAN A.C. and SALOME P.

Abstract (from CDS):

We have carried out a near-infrared, narrowband imaging survey of the Crab Nebula, in the H22.12 µm and Brγ 2.17 µm lines, using the Spartan Infrared camera on the SOAR Telescope. Over a 2'.8x5'.1 area that encompasses about 2/3 of the full visible extent of the Crab, we detect 55 knots that emit strongly in the H2line. We catalog the observed properties of these knots. We show that they are in or next to the filaments that are seen in optical-passband emission lines. Comparison to Hubble Space Telescope [S II] and [O III] images shows that the H2 knots are strongly associated with compact regions of low-ionization gas. We also find evidence of many additional, fainter H2features, both discrete knots and long streamers following gas that emits strongly in [S II]. A pixel-by-pixel analysis shows that about 6% of the Crab's projected surface area has significant H2emission that correlates with [S II] emission. We measured radial velocities of the [S II] λ6716 emission lines from 47 of the cataloged knots and find that most are on the far (receding) side of the nebula. We also detect Brγ emission. It is right at the limit of our survey, and our Brγ filter cuts off part of the expected velocity range. But clearly the Brγ emission has a quite different morphology than the H2knots, following the long linear filaments that are seen in Hα and in [O III] optical emission lines.

Abstract Copyright: ∼

Journal keyword(s): ISM: individual (Crab Nebula, M1) - ISM: supernova remnants

Nomenclature: Fig. 3, Table 2: [LBC2011] NN (Nos 1-55).

Simbad objects: 58

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Number of rows : 58
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 [LBC2011] 52 ISM 05 34 27.080 +22 01 52.16           ~ 1 0
2 [LBC2011] 51 ISM 05 34 27.600 +22 01 51.56           ~ 4 0
3 [LBC2011] 50 ISM 05 34 27.760 +22 01 49.53           ~ 3 0
4 [LBC2011] 49 ISM 05 34 28.140 +22 02 12.48           ~ 1 0
5 [LBC2011] 48 ISM 05 34 28.400 +22 02 11.49           ~ 1 0
6 [LBC2011] 47 ISM 05 34 28.640 +22 02 07.79           ~ 1 0
7 [LBC2011] 53 ISM 05 34 29.280 +22 00 29.94           ~ 1 0
8 [LBC2011] 54 ISM 05 34 31.020 +22 00 25.49           ~ 1 0
9 [LBC2011] 45 ISM 05 34 31.170 +22 01 47.03           ~ 1 0
10 [LBC2011] 46 ISM 05 34 31.210 +22 02 00.31           ~ 2 0
11 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
12 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5476 0
13 [LBC2011] 8 ISM 05 34 32.010 +21 59 32.45           ~ 1 0
14 [LBC2011] 41 ISM 05 34 32.180 +22 02 18.28           ~ 1 0
15 [LBC2011] 44 ISM 05 34 32.330 +22 01 45.50           ~ 2 0
16 [LBC2011] 40 ISM 05 34 32.380 +22 02 15.12           ~ 2 0
17 [LBC2011] 55 ISM 05 34 32.880 +22 00 38.70           ~ 1 0
18 [LBC2011] 43 ISM 05 34 32.990 +22 01 58.45           ~ 1 0
19 [LBC2011] 39 ISM 05 34 33.170 +22 02 12.99           ~ 1 0
20 [LBC2011] 42 ISM 05 34 33.190 +22 02 05.94           ~ 1 0
21 [LBC2011] 6 ISM 05 34 34.100 +21 59 50.69           ~ 1 0
22 [LBC2011] 38 ISM 05 34 34.100 +22 02 12.11           ~ 2 0
23 [LBC2011] 37 ISM 05 34 34.110 +22 02 08.07           ~ 1 0
24 [LBC2011] 4 ISM 05 34 34.200 +21 59 59.89           ~ 2 0
25 [LBC2011] 2 ISM 05 34 34.220 +21 59 38.17           ~ 3 0
26 [LBC2011] 7 ISM 05 34 34.290 +21 59 44.95           ~ 1 0
27 [LBC2011] 1 ISM 05 34 34.310 +21 59 40.69           ~ 3 0
28 [LBC2011] 5 ISM 05 34 34.370 +21 59 49.73           ~ 1 0
29 [LBC2011] 3 ISM 05 34 34.650 +21 59 48.17           ~ 2 0
30 [LBC2011] 36 ISM 05 34 34.810 +22 01 59.33           ~ 1 0
31 [LBC2011] 35 ISM 05 34 35.080 +22 01 56.12           ~ 1 0
32 [LBC2011] 34 ISM 05 34 35.430 +22 01 53.88           ~ 1 0
33 [LBC2011] 33 ISM 05 34 35.500 +22 01 51.99           ~ 1 0
34 [LBC2011] 32 ISM 05 34 35.550 +22 01 40.73           ~ 1 0
35 [LBC2011] 30 ISM 05 34 35.770 +22 01 05.90           ~ 1 0
36 [LBC2011] 31 ISM 05 34 35.970 +22 01 19.45           ~ 1 0
37 [LBC2011] 29 ISM 05 34 36.020 +22 01 06.91           ~ 1 0
38 [LBC2011] 9 ISM 05 34 36.110 +21 58 57.77           ~ 1 0
39 [LBC2011] 26 ISM 05 34 36.510 +22 01 01.21           ~ 1 0
40 [LBC2011] 28 ISM 05 34 36.510 +22 01 05.62           ~ 1 0
41 [LBC2011] 27 ISM 05 34 36.750 +22 01 02.41           ~ 1 0
42 [LBC2011] 10 ISM 05 34 36.940 +21 59 06.31           ~ 1 0
43 [LBC2011] 25 ISM 05 34 37.010 +22 00 57.80           ~ 1 0
44 [LBC2011] 16 ISM 05 34 37.090 +21 59 28.46           ~ 1 0
45 [LBC2011] 15 ISM 05 34 37.380 +21 59 22.33           ~ 1 0
46 [LBC2011] 11 ISM 05 34 37.430 +21 59 06.71           ~ 1 0
47 [LBC2011] 14 ISM 05 34 37.960 +21 59 20.92           ~ 1 0
48 [LBC2011] 13 ISM 05 34 38.360 +21 59 17.32           ~ 1 0
49 [LBC2011] 17 ISM 05 34 38.440 +21 59 26.67           ~ 1 0
50 [LBC2011] 12 ISM 05 34 38.510 +21 59 11.87           ~ 1 0
51 [LBC2011] 20 ISM 05 34 38.900 +21 59 57.28           ~ 1 0
52 [LBC2011] 19 ISM 05 34 38.910 +21 59 53.63           ~ 1 0
53 [LBC2011] 21 ISM 05 34 39.350 +21 59 53.54           ~ 1 0
54 [LBC2011] 22 ISM 05 34 39.750 +21 59 54.90           ~ 1 0
55 [LBC2011] 24 ISM 05 34 39.860 +22 00 24.28           ~ 1 0
56 [LBC2011] 18 ISM 05 34 40.200 +21 59 28.96           ~ 1 0
57 [LBC2011] 23 ISM 05 34 41.160 +22 00 03.81           ~ 1 0
58 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0

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