2019A&A...629A..96S


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.22CET05:44:34

2019A&A...629A..96S - Astronomy and Astrophysics, volume 629A, 96-96 (2019/9-1)

Using Herschel and Planck observations to delineate the role of magnetic fields in molecular cloud structure.

SOLER J.D.

Abstract (from CDS):

We present a study of the relative orientation between the magnetic field projected onto the plane of sky (B|) on scales down to 0.4pc, inferred from the polarized thermal emission of Galactic dust observed by Planck at 353GHz, and the distribution of gas column density (NH) structures on scales down to 0.026pc, derived from the observations by Herschel in submillimeter wavelengths, toward ten nearby (d<450pc) molecular clouds. Using the histogram of relative orientation technique in combination with tools from circular statistics, we found that the mean relative orientation between NH and B| toward these regions increases progressively from 0°, where the NH structures lie mostly parallel to B|, with increasing NH, in many cases reaching 90°, where the NH structures lie mostly perpendicular to B|. We also compared the relative orientation between NH and B| and the distribution of NH, which is characterized by the slope of the tail of the NH probability density functions (PDFs). We found that the slopes of the NH PDF tail are steepest in regions where NH and B| are close to perpendicular. This coupling between the NH distribution and the magnetic field suggests that the magnetic fields play a significant role in structuring the interstellar medium in and around molecular clouds. However, we found no evident correlation between the star formation rates, estimated from the counts of young stellar objects, and the relative orientation between NH and B| in these regions.

Abstract Copyright: © J. D. Soler 2019

Journal keyword(s): ISM: general - ISM: magnetic fields - ISM: clouds - dust, extinction - stars: formation - submillimeter: ISM

Simbad objects: 28

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Number of rows : 28

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 LDN 1455 DNe 03 28 00.6480 +30 07 58.800           ~ 168 1
2 NGC 1333 SFR 03 28 55 +31 22.2   10.9       ~ 1200 1
3 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 252 0
4 IC 348 OpC 03 44 34 +32 09.8           ~ 1212 1
5 LDN 1471 DNe 03 48.0 +32 54           ~ 277 0
6 NAME Eri Bubble HI 03 52 -02.0           ~ 83 0
7 Barnard 213 DNe 04 20 51 +27 16.3           ~ 149 0
8 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3374 0
9 NAME LIC Cld 04 41 +31.           ~ 246 0
10 V* V2254 Ori Or* 05 35 14.113 -05 22 22.73           B 279 2
11 NAME Ori A MoC 05 38 -07.1           ~ 2639 0
12 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1142 0
13 NAME Vela C Cld 08 57 -43.2           ~ 120 0
14 NAME Cha I MoC 11 06 48 -77 18.0           ~ 946 1
15 NAME Cha Dark Cloud SFR 11 55 -78.0           ~ 537 1
16 NAME Musca Cld 12 23 -71.3           ~ 155 0
17 NAME Cha II MoC 12 54 -77.2           ~ 295 0
18 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 346 1
19 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 217 0
20 NAME Lupus IV MoC 16 03 12.4 -42 07 43           ~ 123 0
21 NAME Lupus III SFR 16 09.6 -39 03           ~ 266 0
22 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2971 0
23 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 325 1
24 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 897 2
25 NAME Aql Rift DNe 18 32 -01.0           ~ 222 1
26 IC 5146 SFR 21 53 24 +47 16.0   7.82 7.2     ~ 380 2
27 NAME Cep Flare MoC 23 34 +72.0           ~ 98 0
28 NAME Local Bubble ISM ~ ~           ~ 681 0

    Equat.    Gal    SGal    Ecl

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2020.02.22-05:44:34

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