2014A&A...561A..91L


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.24CET01:39:38

2014A&A...561A..91L - Astronomy and Astrophysics, volume 561A, 91-91 (2014/1-1)

3D maps of the local ISM from inversion of individual color excess measurements.

LALLEMENT R., VERGELY J.-L., VALETTE B., PUSPITARINI L., EYER L. and CASAGRANDE L.

Abstract (from CDS):

Three-dimensional (3D) maps of the Galactic interstellar matter (ISM) are a potential tool of wide use, but accurate and detailed maps are still lacking. One of the ways to construct the maps is to invert individual distance-limited ISM measurements, a method we have applied here to measurements of stellar color excess in the optical. We assembled color excess data together with the associated parallax or photometric distances to constitute a catalog of ≃23000 sightlines for stars within 2.5 kpc. The photometric data are taken from Stroemgren catalogs, the Geneva photometric database, and the Geneva-Copenhagen survey. We also included extinctions derived towards open clusters. We applied an inversion method based on a regularized Bayesian approach to this color excess dataset, a method previously used for mapping at closer distances. We show the dust spatial distribution resulting from the inversion by means of planar cuts through the differential opacity 3D distribution, and by means of 2D maps of the integrated opacity from the Sun up to various distances. The mapping assigns locations to the nearby dense clouds and represents their distribution at the spatial resolution that is allowed by the dataset properties, i.e. ≃10 pc close to the Sun and increasing to ≃100 pc beyond 1 kpc. Biases toward nearby and/or weakly extincted stars make this dataset particularly appropriate to mapping the local and neighboring cavities and to locating faint, extended nearby clouds, which are both goals that are difficult or impossible with other mapping methods. The new maps reveal a ≃1 kpc wide empty region in the third quadrant in the continuation of the so-called CMa tunnel of the Local Cavity, a cavity that we identify as the Superbubble GSH238+00+09 detected in radio emission maps and that is found to be bounded by the Orion and Vela clouds. The maps also show an extended narrower tunnel in the opposite direction (l ≃70°) that also extends the Local Bubble further and together with it forms a conspicuous cavity bounded by the main Lup, Sco, Oph, Aql, Lac, Cep, and Tau clouds and OB associations. This chain of cavities and surrounding dense regions constitute the first computed representation of the well known Gould belt/Lindblad ring structures. Finally, almost all off-plane faint features that appear in 2D dust maps have a counterpart in the 3D maps, providing the dust distribution in nearby tenuous clouds.

Abstract Copyright:

Journal keyword(s): local insterstellar matter - dust, extinction - ISM: bubbles - ISM: clouds

Simbad objects: 38

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Number of rows : 38

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 Cas Cloud ~ 00 37 +65.8           ~ 26 0
2 NAME Lindblad Ring DNe 02 16 45 +64 21.5           ~ 41 0
3 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1102 0
4 LDN 1459 DNe 04 08.4 +39 38           ~ 16 0
5 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3614 0
6 NAME Barnard's Loop HII 05 27.5 -03 58           ~ 108 1
7 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 496 0
8 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 879 1
9 C 0652-245 OpC 06 56 20 -24 43.8   3.02 2.6     ~ 139 0
10 NAME Vela Supershell sh 07 40 -22.           ~ 25 0
11 NAME GUM Nebula ISM 07 43 -42.1           ~ 392 1
12 NAME IRAS Vela Shell IR 07 44 -42.4           ~ 35 0
13 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1132 2
14 NAME Musca Cld 12 23 -71.3           ~ 165 0
15 NAME Loop I SR? 15 01 -38.7           ~ 336 2
16 NAME Circinus Cloud Cld 15 02 -63.0           ~ 32 0
17 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 234 0
18 NAME Lup II MoC 15 57 08 -37 47.1           ~ 97 1
19 NAME Lup Cloud SFR 16 03 -38.1           ~ 545 0
20 NAME Lupus IV MoC 16 03 12.4 -42 07 43           ~ 132 0
21 NAME Lupus III SFR 16 09.6 -39 03           ~ 282 0
22 NAME ASSOC II SCO As* 16 15 -24.2           ~ 1157 1
23 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3114 1
24 NAME Scorpius Cloud MoC 16 29 00 -19 00.0           ~ 28 0
25 NAME Sco-Oph Region reg 16 30.0 -21 00           ~ 72 0
26 NAME Hercules Shell sh 16 42 +34.9           ~ 6 1
27 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11932 0
28 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 944 2
29 [EC92] 95 Y*O 18 29 57.893 +01 12 46.25           K1.0 72 3
30 NAME Aql Rift DNe 18 32 -01.0           ~ 249 1
31 NAME NCP Loop reg 20 15 25.2 +89 53 34           ~ 25 0
32 NAME Northern Coalsack DNe 20 21 +37.0           ~ 105 0
33 NAME Cep Cloud SFR 22 00.0 +76 30           ~ 107 0
34 NAME Lacerta I G 22 58 16.3 +41 17 28           ~ 34 0
35 NAME Local Bubble ISM ~ ~           ~ 713 0
36 NAME Gould Belt PoG ~ ~           ~ 737 1
37 NAME Aql Region reg ~ ~           ~ 316 0
38 NAME Local Arm reg ~ ~           ~ 390 0

    Equat.    Gal    SGal    Ecl

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2021.01.24-01:39:38

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