TY  - JOUR
A1  - Murray, Claire E.
A1  - Stanimirovic, Snezana
A1  - McClure-Griffiths, Naomi M.
A1  - Putman, Mary E.
A1  - Liszt, Harvey S.
A1  - Wong, Tony
A1  - Richter, Philipp
A1  - Dawson, Joanne R.
A1  - Dickey, John M.
A1  - Lindner, Robert R.
A1  - Babler, Brian L.
A1  - Allison, James R.
T1  - First detection of HCO+ absorption in the magellanic system
JF  - The astrophysical journal : an international review of spectroscopy and astronomical physics
N2  - We present the first detection of HCO+ absorption in the Magellanic System. Using the ATCA, we observed nine extragalactic radio continuum sources behind the Magellanic System and detected HCO+ absorption toward one source located behind the leading edge of the Magellanic Bridge. The detection is located at an LSR velocity of v = 214.0 +/- 0.4 km s(-1), with an FWHM of Delta v = 4.5 +/- 1.0 km s(-1), and an optical depth of tau (HCO+) = 0.10 +/- 0.02. Although there is abundant neutral hydrogen (H I) surrounding the sight line in position-velocity space, at the exact location of the absorber the H I column density is low, <10(20) cm(-2), and there is little evidence for dust or CO emission from Planck observations. While the origin and survival of molecules in such a diffuse environment remain unclear, dynamical events such as H I flows and cloud collisions in this interacting system likely play an important role.
KW  - ISM: molecules
KW  - ISM: structure
KW  - Magellanic Clouds
Y1  - 2015
U6  - https://doi.org/10.1088/0004-637X/808/1/41
SN  - 0004-637X
SN  - 1538-4357
VL  - 808
IS  - 1
PB  - IOP Publ. Ltd.
CY  - Bristol
ER  -