2009ApJ...699..469C


Query : 2009ApJ...699..469C

2009ApJ...699..469C - Astrophys. J., 699, 469-477 (2009/July-1)

Warped ionized hydrogen in the galaxy.

CERSOSIMO J.C., MADER S., SANTIAGO FIGUEROA N., FIGUEROA VELEZ S., SOTO C.L. and AZCARATE D.

Abstract (from CDS):

We report observations of the H166α (ν = 1424.734 MHz) radio recombination line (RRL) emission from the Galactic plane in the longitude range l = 267°-302° and latitude range b = -3°.0 to +1°.5. The line emission observed describes the Carina arm in the Galactic azimuth range from θ = 260° to 190°. The structure is located at negative latitudes with respect to the formal Galactic plane. The observations are combined with RRL data from the first Galactic quadrant. Both quadrants show the signature of the warp for the ionized gas, but an asymmetry of the distribution is noted. In the fourth quadrant, the gas is located between Galactic radii R ~ 7 and 10 kpc, and the amplitude of the warp is seen from the midplane to z ~ -150 pc. In the first quadrant, the gas is found between R ~ 8 and 13-16 kpc, and flares to z ~ +350 pc. We confirm the warp of the ionized gas near the solar circle. The distribution of the ionized gas is compared with the maximum intensity H I emission (0.30 < n_ H I_ < 0.45/cm3) at intervals of the Galactic ring. The ionized material is correlated with the H I maximum intensity in both quadrants, and both components show the same tilted behavior with respect to the mid-Galactic plane.

Abstract Copyright:

Journal keyword(s): Galaxy: disk - Galaxy: structure - ISM: clouds - ISM: structure

Nomenclature: Tables 1-2: [CMS2009] GLLL.lll-BB.bbb N=13.

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 - 2023
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6567 1
2 NAME Per Arm PoG 03 30 +45.0           ~ 1434 0
3 NAME Gal Anticenter reg 05 46 +28.9           ~ 840 0
4 NAME Puppis reg 07 40 -28.0           ~ 87 0
5 RCW 36 HII 08 59 00.9 -43 44 10     15.20     ~ 142 0
6 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 297 2
7 [CMS2009] G267.965-01.029 PoG 08 59 19 -47 30.6           ~ 1 0
8 NAME Hya A LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 980 1
9 [CMS2009] G274.026-01.184 PoG 09 24 21 -52 02.0           ~ 1 0
10 GUM 26 HII 09 24 30.1 -51 59 07           ~ 44 0
11 NAME Car Arm PoG 10 00 -60.0           ~ 421 1
12 [CMS2009] G282.202-01.093 PoG 10 08 05 -57 14.2           ~ 1 0
13 RCW 45 HII 10 11.8 -56 24           ~ 8 0
14 NGC 3199 HII 10 16 32.8 -57 56 02           ~ 64 1
15 [CMS2009] G284.095-00.507 PoG 10 22 12 -57 48.8           ~ 1 0
16 GUM 29 HII 10 24 14.6 -57 46 58           ~ 204 0
17 GAL 286.20-00.16 HII 10 37 12.4 -58 36 12           ~ 4 0
18 [CMS2009] G286.229-00.174 PoG 10 37 24 -58 37.8           ~ 1 0
19 [CMS2009] G287.558-00.705 PoG 10 44 30 -59 44.0           ~ 1 0
20 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 975 2
21 [CMS2009] G289.046-00.339 PoG 10 56 26 -60 04.4           ~ 1 0
22 [CMS2009] G289.839-01.189 PoG 10 59 21 -61 10.7           ~ 1 0
23 [CMS2009] G291.632-00.540 PoG 11 15 11 -61 16.9           ~ 1 0
24 BRAN 362C HII 11 28 52.9 -62 37 33           ~ 9 0
25 [CMS2009] G293.648-01.367 PoG 11 28 58 -62 44.6           ~ 1 0
26 GAL 294.84-01.78 HII 11 37 55.6 -63 29 08           ~ 5 0
27 IC 2944 OpC 11 38 20.00 -63 22 22.0           ~ 181 0
28 [CMS2009] G294.941-01.697 PoG 11 39 01 -63 26.4           ~ 1 0
29 [CMS2009] G295.136-00.652 PoG 11 43 09 -62 29.1           ~ 1 0
30 [CMS2009] G298.618-00.347 PoG 12 13 25 -62 54.0           ~ 1 0
31 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13455 0
32 NAME Cyg Superbubble PoC 20 47 +41.2           ~ 77 1
33 IC 5070 HII 20 51.0 +44 22           ~ 201 1
34 NGC 7000 Cl* 20 58 47 +44 19.8           ~ 389 0
35 NAME Norma-Cygnus Arm reg ~ ~           ~ 77 0
36 NAME Local Arm reg ~ ~           ~ 487 0
37 NAME Carina Region reg ~ ~           ~ 178 0

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2023.02.07-18:53:40

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