2018AJ....155...80B


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET17:36:20

2018AJ....155...80B - Astron. J., 155, 80-80 (2018/February-0)

Kinematics of the Horsehead Nebula and IC 434 ionization front in CO and C+.

BALLY J., CHAMBERS E., GUZMAN V., KETO E., MOOKERJEA B., SANDELL G., STANKE T. and ZINNECKER H.

Abstract (from CDS):

Stratospheric Observatory for Infrared Astronomy [C II] 157 µm, APEX 860 µm J = 3-2 CO, and archival James Clerk Maxwell Telescope J = 2-1 CO and 13CO observations of the Horsehead Nebula are presented. The photon-dominated region (PDR) between the Orion B molecular cloud and the adjacent IC 434 H II region is used to study the radial velocity structure of the region and the feedback impacts of UV radiation. Multiple west-facing cloud edges are superimposed along the line of sight with radial velocities that differ by a few kilometers per second. The Horsehead lies in the foreground blueshifted portion of the Orion B molecular cloud and is predominantly illuminated from the rear. The mean H2 density of the Horsehead, ∼6×103 cm–3, results in a spatially thin PDR where the photoablation flow has compressed the western cloud edge to an H2 density of (2–6)×104 cm–3. The associated [C II] 157 µm layer has a width L < 0.05 pc. The background parts of the Orion B cloud in the imaged field consist of a clumpy medium surrounded by molecular gas with H2 densities lower by one to two orders of magnitude. Along the straight part of the IC 434 ionization front, the PDR layer probed by [C II] 157 µm emission is much thicker with L ∼ 0.5 pc. A possible model for the formation and evolution of this edge-on ionization front and PDR is presented. The [C II] data were independently analyzed and published by Pabst et al.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): H II regions - ISM: individual objects: Horsehead Nebula, Barnard 33 - ISM: kinematics and dynamics - photon-dominated region PDR - photon-dominated region PDR

Simbad objects: 15

goto Full paper

goto View the reference in ADS

Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Eri Bubble HI 03 52 -02.0           ~ 92 0
2 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1042 2
3 M 42 HII 05 35 17.3 -05 23 28           ~ 3777 0
4 NAME Ori I As* 05 38 -02.8           ~ 566 0
5 NAME Ori A MoC 05 38 -07.1           ~ 2744 0
6 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 498 0
7 * sig Ori Y*O 05 38 44.7665260139 -02 36 00.284709290 2.54 3.58 3.79 3.87 4.11 O9.5V 754 0
8 IRAS 05383-0228 Y*O 05 40 51.7279517128 -02 26 49.015215891         14.38 ~ 15 0
9 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 457 0
10 IC 434 HII 05 41 -02.5           ~ 79 1
11 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 580 1
12 HD 37903 Em* 05 41 38.3889407943 -02 15 32.476182358 7.32 7.94 7.83 7.64 7.52 B3IV 330 1
13 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1213 0
14 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1084 1
15 LDN 1630 DNe 05 45.5 -00 59           ~ 356 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2018AJ....155...80B and select 'bookmark this link' or equivalent in the popup menu


2021.03.05-17:36:20

© Université de Strasbourg/CNRS

    • Contact