2017MNRAS.465..559S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST04:52:31

2017MNRAS.465..559S - Mon. Not. R. Astron. Soc., 465, 559-568 (2017/February-2)

Magnetic field structure of IC 63 and IC 59 associated with H II region Sh 185.

SOAM A., MAHESWAR G., LEE C.W., NEHA S. and ANDERSSON B.-G.

Abstract (from CDS):

Bright-rimmed clouds (BRCs) are formed at the periphery of H II regions as the radiation from the central star interacts with dense gas. The ionization and resulting compression of the clouds may lead to cloud disruption causing secondary star formation depending on the stellar and gas parameters. Here we use R-band polarimetry to probe the plane-of-the sky magnetic field for two nearby BRCs, IC 59 and IC 63. Both nebulae are illuminated by γ Cas with the direction of the ionizing radiation being orientated parallel or perpendicular to the local magnetic field, allowing us to probe the importance of magnetic field pressure in the evolution of BRCs. Because of the proximity of the system (∼200 pc), we have acquired a substantial sample of over 500 polarization measurements for stars that form the background to the nebulae. On large scales, the magnetic field geometries of both clouds are anchored to the ambient magnetic field. For IC 63, the magnetic field is aligned parallel to the head-tail morphology of the main condensation, with a convex morphology relative to the direction of the ionizing radiation. We estimate the plane-of-the-sky magnetic field strength in IC 63 to be ∼ 90 µG. In IC 59, the projected magnetic field follows the M-shape morphology of the cloud. Here, field lines present a concave shape with respect to the direction of the ionizing radiation from γ Cas. Comparing our observations to published theoretical models, we find good general agreement, supporting the importance of magnetic fields in BRC evolution.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): polarization - ISM: general - ISM: magnetic fields - ISM: magnetic fields

VizieR on-line data: <Available at CDS (J/MNRAS/465/559): ic59pol.dat ic63pol.dat>

Status at CDS:   All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * gam Cas Be* 00 56 42.5317 +60 43 00.265 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1137 2
2 BD+64 106 ** 00 57 36.6895910701 +64 51 34.908975189 10.82 11.01   10.21   B1V 52 0
3 IC 59 RNe 00 57 42.40 +61 04 59.8           ~ 30 1
4 IC 63 HII 00 59 01.37 +60 53 17.8   13.33       ~ 83 1
5 LBN 623 HII 01 00.0 +60 59           ~ 26 2
6 HD 236633 * 01 09 12.3403529481 +60 37 40.960109589 8.96 9.49 9.2     B0 47 0
7 HD 12340 * 02 03 01.3866721612 +61 03 54.552999999   9.54 9.34     B9III 17 0
8 HD 12708 * 02 06 31.0163955790 +61 02 41.299910187   8.88 8.68     B9V 18 0
9 V* CC Cas bL* 03 14 05.3362562931 +59 33 48.488947721 7.07 7.56 7.08     O8.5III(n)((f)) 268 0
10 HD 25443 * 04 06 08.0670623506 +62 06 06.620149609 6.45 6.998 6.766     B0.5III 116 0
11 IRAS 05355-0146 Cld 05 38 04.9 -01 45 09           ~ 21 0
12 NAME Ori 1-2 CGb 05 38 05.3 -01 45 10           ~ 29 0
13 * 9 Gem s*b 06 16 58.7058947017 +23 44 27.286451876 6.31 6.70 6.25 5.78 5.38 B3Iab 222 0
14 CG 31 CGb 08 08 57 -35 59.4           ~ 32 0
15 MSX6C G253.2934-01.6114 Cld 08 09 32.8 -36 05 00           ~ 10 0
16 CG 30 CGb 08 09 32.8 -36 05 00           ~ 120 0
17 MSX6C G313.2850-00.3350 Cld 14 19 42.1 -61 25 17           ~ 11 1
18 SFO 89 Cld 18 09 54.3 -24 04 56           ~ 9 1
19 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 935 2

    Equat.    Gal    SGal    Ecl

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2020.07.13-04:52:31

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