2007ApJS..173...85K

Query : 2007ApJS..173...85K

2007ApJS..173...85K - Astrophys. J., Suppl. Ser., 173, 85-103 (2007/November-0)

Faint H I 21 cm emission line wings at forbidden velocities.

KANG J.-H. and KOO B.-C.

Abstract (from CDS):

We present the results of a search for faint H I 21 cm emission line wings at velocities forbidden by Galactic rotation in the Galactic plane using the Leiden/Dwingeloo H I Survey data and the H I Southern Galactic Plane Survey data. These ``forbidden-velocity wings'' (FVWs) appear as protruding excessive emission in comparison with their surroundings in limited (≲2°) spatial regions over velocity extents of more than ∼20 km/s in large-scale (ℓ, v) diagrams. Their high velocities imply that there should be some dynamical phenomena associated. We have identified 87 FVWs. We present their catalog and discuss their distribution and statistical properties. We found that 85% of FVWs are not coincident with known supernova remnants (SNRs), galaxies, or high-velocity clouds. Their natures are currently unknown. We suspect that many of them are fast-moving H I shells and filaments associated with the oldest SNRs that are essentially invisible except via their H I line emission. We discuss other possible origins.

Abstract Copyright: ∼

Journal keyword(s): ISM: General - ISM: Kinematics and Dynamics - ISM: Structure - Radio Lines: ISM - ISM: Supernova Remnants

VizieR on-line data: <Available at CDS (J/ApJS/173/85): table2.dat>

Nomenclature: Table 2: FVW LLL.l+BB.b N=87.

Simbad objects: 37

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Number of rows : 37
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 HVC 130+01-161 HVC 01 55.9 +60 38           ~ 53 0
2 NAME HH 7-11 FIR 03 29 03.9 +31 16 06           ~ 351 0
3 IC 342 SBG 03 46 48.514 +68 05 45.98   10.5       ~ 1517 1
4 UGCA 86 AG? 03 59 48.30 +67 08 18.6   14.2 14.2     ~ 104 0
5 HD 35619 * 05 27 36.1458757248 +34 45 19.002906324 8.08 8.82 8.69     O7.5V((f))z 105 0
6 HD 37737 SB* 05 42 31.1584798320 +36 12 00.508318740 8.02 8.30 8.06     O9.5II-III(n) 93 0
7 LEDA 2126032 G 05 52 57.5 +38 24 13           ~ 3 0
8 HD 42088 * 06 09 39.5728368936 +20 29 15.450599580 6.73 7.58 7.57 8.45   O6V((f))z 244 0
9 HVC 215.0+07.0+103 Cld 07 20 +01.3           ~ 2 0
10 Sand 5 PM* 12 04 55.2834163416 +21 41 26.278412208   16.84 15.30     M3: 9 0
11 HD 125241 Pu* 14 20 22.7843645064 -60 53 22.245268236 8.60 9.08 8.60 8.95   O8.5Ib(f) 83 0
12 HD 151515 SB* 16 49 48.2512632192 -42 00 06.177451752 6.77 7.48 7.30 7.11 6.88 O7II(f) 124 0
13 HD 151932 WR* 16 52 19.2477039480 -41 51 16.270066224 6.06 6.79 6.51 7.64   WN7h 313 0
14 * 11 Sgr Or* 18 09 17.6999100192 -23 59 18.231196056 6.65 7.45 7.31 8.36   O7V(n)z+B0:V: 140 2
15 HD 175876 * 18 58 10.7660947512 -20 25 25.541961636 5.79 6.82 6.94 6.93   O6.5III(n)(f) 149 0
16 FVW 40.0+0.5 HI 19 02 35.6 +06 30 59           ~ 3 0
17 FVW 49.0-0.5 HI 19 23 +14.0           ~ 1 1
18 W 51 SNR 19 23 50 +14 06.0           ~ 1278 1
19 SNR G054.4-00.3 SNR 19 33 20 +18 56.0           ~ 96 0
20 FVW 54.5-0.5 HI 19 34 +18.9           ~ 1 1
21 SNR G068.8+02.6 SNR 19 52 55 +32 54.2           ~ 352 1
22 FVW 69.0+2.5 HI 19 55 +32.9           ~ 1 1
23 HD 193682 Em* 20 20 08.9387110032 +37 49 51.313158876 8.44 8.87 8.42     O4.5IV(f) 87 0
24 FVW 78.0+2.0 HI 20 21 +40.2           ~ 1 1
25 PSR J2021+4026 Psr 20 21 30.496 +40 26 53.56           ~ 275 2
26 BD+40 4179 * 20 27 43.6151708592 +40 35 43.510878960 9.79 10.21 9.71     O8Vz 35 0
27 EM* AS 422 WR* 20 32 06.2786571432 +40 48 29.527101576   13.46 11.83     WN7o/CE+O7V(f) 101 0
28 BD+45 3216 ** 20 33 50.350 +45 39 41.11 8.89 9.47 9.18     O8 41 0
29 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2529 2
30 FVW 88.5+5.0 HI 20 43 +50.4           ~ 1 1
31 SNR G089.0+04.7 SNR 20 45.0 +50 35           ~ 224 0
32 NAME Cepheus 1 LSB 20 51 10.7 +56 53 25           ~ 24 0
33 * lam Cep s*b 22 11 30.5765111040 +59 24 52.154264880 4.55 5.29 5.05 4.77 4.62 O6.5I(n)fp 684 1
34 HVC 084-13-94 HVC 22 36.5 +46 51           ~ 10 0
35 HD 216532 V* 22 52 30.5558211936 +62 26 25.947105900 8.06 8.46 8.0     O8.5V(n) 143 0
36 3C 461 BL? 23 23 24.000 +58 48 54.00     14.30     ~ 2792 1
37 FVW 112.0-2.0 HI 23 25 +59.0           ~ 1 1

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