2011A&A...533A.105W


Query : 2011A&A...533A.105W

2011A&A...533A.105W - Astronomy and Astrophysics, volume 533A, 105-105 (2011/9-1)

The high-velocity cloud complex Galactic center negative as seen by EBHIS and GASS. I. Cloud catalog and global properties.

WINKEL B., BEN BEKHTI N., DARMSTAEDTER V., FLOEER L., KERP J. and RICHTER P.

Abstract (from CDS):

Using Milky Way data of the new Effelsberg-Bonn HI Survey (EBHIS) and the Galactic All-Sky Survey (GASS), we present a revised picture of the high-velocity cloud (HVC) complex Galactic center negative (GCN). Owing to the higher angular resolution of these surveys compared to previous studies (e.g., the Leiden Dwingeloo Survey), we resolve complex GCN into lots of individual tiny clumps, that mostly have relatively broad line widths of more than 15km/s. We do not detect a diffuse extended counterpart, which is unusual for an HVC complex. In total 243 clumps were identified and parameterized which allows us to statistically analyze the data. Cold-line components (i.e., Δvfwhm<7.5km/s) are found in about 5% only of the identified cloudlets. Our analysis reveals that complex GCN is likely built up of several subpopulations that do not share a common origin. Furthermore, complex GCN might be a prime example for warm-gas accretion onto the Milky Way, where neutral HI clouds are not stable against interaction with the Milky Way gas halo and become ionized prior to accretion.

Abstract Copyright:

Journal keyword(s): ISM: clouds - Galaxy: halo

Simbad objects: 8

goto Full paper

goto View the references in ADS

Number of rows : 8
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 Stream HVC 00 32 -30.0           ~ 924 1
2 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13443 0
3 NAME Galactic Circumnuclear Disk PoG 17 45 40.0 -29 00 28           ~ 148 0
4 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1224 0
5 NAME Gal Center Positive HVC 20 51.2 +01 41           ~ 88 1
6 PHL 1811 Sy1 21 55 01.5124437432 -09 22 24.349496808   13.9 16.8 14.1   ~ 176 1
7 QSO B2155-304 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1672 1
8 QSO B2225-4025 QSO 22 28 26.9164251816 -40 09 57.811980456   18.30 18.28     ~ 18 0

To bookmark this query, right click on this link: simbad:objects in 2011A&A...533A.105W and select 'bookmark this link' or equivalent in the popup menu


2023.02.01-20:34:45

© Université de Strasbourg/CNRS

    • Contact