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Drastic changes in the molecular absorption at redshift z=0.89 toward the quasar PKS 1830-211
Sebastien Muller, Michel Guelin
A 12 year-long monitoring of the absorption caused by a z=0.89 spiral galaxy on the line of sight to the radio-loud gravitationally lensed quasar PKS 1830-211 reveals spectacular c…
Distribution and kinematics of the HCN(3-2) emission down to the innermost region in the envelope of the O-rich star W Hya
Muller Sebastien, Dinh-V-Trung, He Jin-Hua +1
We report high angular resolution observations of the HCN (3-2) line emission in the circumstellar envelope of the O-rich star W Hya with the Submillimeter Array. The proximity of…
Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe
Michael T. Murphy, Victor V. Flambaum, Sebastien Muller +1
The Standard Model of particle physics assumes that the so-called fundamental constants are universal and unchanging. Absorption lines arising in molecular clouds along quasar sigh…
Searching for dust in the intracluster medium from reddening of background galaxies
Sebastien Muller, Szu-Ying Wu, Bau-Ching Hsieh +4
We report a search for the presence of dust in the intra-cluster medium based on the study of statistical reddening of background galaxies. Armed with the Red Sequence Cluster surv…
Jet-disturbed molecular gas near the Seyfert 2 nucleus in M51
Satoki Matsushita, Sebastien Muller, Jeremy Lim
Previous molecular gas observations at arcsecond-scale resolution of the Seyfert 2 galaxy M51 suggest the presence of a dense circumnuclear rotating disk, which may be the reservoi…
Distribution of the molecular absorption in front of the quasar B0218+357
S. Muller, M. Guelin, F. Combes +1
The line of sight to the quasar B0218+357, one of the most studied lensed systems, intercepts a z=0.68 spiral galaxy, which splits its image into two main components A and B, separ…
The molecular envelope around the red supergiant VY CMa
S. Muller, Dinh-V-Trung, J. Lim +3
We present millimeter interferometric observations of the molecular envelope around the red supergiant VY CMa with the SubMillimeter Array (SMA). The high angular resolution (< 2''…
Probing isotopic ratios at z = 0.89: molecular line absorption in front of the quasar PKS 1830-211
Sebastien Muller, Michel Guelin, Michael Dumke +2
With the Plateau de Bure interferometer, we have measured the C, N, O and S isotopic abundance ratios in the arm of a spiral galaxy with a redshift of 0.89. The galaxy is seen face…
A Detection of [CII] line emission in the z=4.7 QSO BR1202-0725
D. Iono, M. S. Yun, M. Elvis +6
We present ~3'' resolution imaging of the z=4.7 QSO BR1202-0725 at 900 micron from the Submillimeter Array. The two submillimeter continuum components are clearly resolved from eac…
HCN and HCO+ emission in the disk of M31
Nathalie Brouillet, Sebastien Muller, Fabrice Herpin +2
We report observations made with the IRAM 30m radiotelescope in the HCN(1-0) and HCO+(1-0) lines towards a sample of molecular complexes (GMCs) in the disk of the Andromeda galaxy…
The Opacity of Nearby Galaxies from Counts of Background Galaxies: II. Limits of the Synthetic Field Method
Rosa A. Gonzalez, Laurent Loinard, Ronald J. Allen +1
Recently, we have developed and calibrated the Synthetic Field Method (SFM) to derive the total extinction through disk galaxies. The method is based on the number counts and color…