1996A&A...312...67K


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.11CEST10:37:50

1996A&A...312...67K - Astronomy and Astrophysics, volume 312, 67-73 (1996/8-1)

High-velocity clouds impacting onto the galactic disk. A new class of X-ray emitting objects.

KERP J., MACK K.-H., EGGER R., PIETZ J., ZIMMER F., MEBOLD U., BURTON W.B. and HARTMANN D.

Abstract (from CDS):

We present observational evidence in ROSAT all-sky survey data that large parts of the high-velocity cloud (HVC) complex C are associated with soft X-ray radiation. Moreover the new Leiden/Dwingeloo northern-sky survey shows very faint HI 21-cm line emission which connects the HVC velocity regime with the low-velocity atomic hydrogen of the galactic disk by velocity bridges. Finally we find a close positional correlation of soft X-ray enhancements and the atomic hydrogen velocity bridges. Thus we obtain for the first time direct evidence that large parts of the HVC complex C are impacting onto the galactic disk. As a consequence, the HVCs of complex C are closer to the galactic disk than previously assumed. Most probably the gas of the Reynolds and/or Lockman layers are the collision partners of the HVCs.

Abstract Copyright:

Journal keyword(s): ISM: clouds - Galaxy: halo - Galaxy: kinematics and dynamics - X-rays: ISM - radio lines: ISM

Simbad objects: 2

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Number of rows : 2

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 HVC 090.5+42.5-130 HVC 16 15 52.8 +59 42 00           ~ 3 0
2 NAME HVC Complex C HVC 16 34.8 +63 07           ~ 230 1

    Equat.    Gal    SGal    Ecl

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2021.05.11-10:37:50

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