U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Francis J. Lovas (Assoc)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 160

Confirmation of Interstellar Methycyanodiacetylene (CH3C5N)

April 11, 2006
Author(s)
Lewis E. Snyder, J M. Hollis, P R. Jewell, Francis J. Lovas, A J. Remijan
Ten spectral lines of the symmetric-top molecule methylcyanodiacetylene (CH3C5N) have been detected with the 100 m Green Bank Telescope (GBT) toward the Taurus molecular cloud TMC-1. Both K=0 and K=1 components of the 12K-11K, 13K-12K, 14K-13K, 15K-14K

Hyperfine Structure Identification of Interstellar Cyanoallene Toward TMC-1

January 10, 2006
Author(s)
Francis J. Lovas, A Remijan, J M. Hollis, P R. Jewell, Lewis E. Snyder
Interstellar cyanoallene (CH2CCHCN) has been detected with the 100-m Green Bank Telescope (GBT) toward the dark Taurus Molecular Cloud (TMC-1) by means of the 414-313, 404-303, 515 -414, and 505-404 rotational transitions at 20.2 GHz, 20.6 GHz, 25.2 GHz

Microwave Spectrum and Structure of Methyl Phosphonic Difluoride

January 2, 2006
Author(s)
R D. Suenram, Francis J. Lovas, David F. Plusquellic, M W. Elizy, J M. Lochner, J O. Jensen, A C. Samuels
The rotational spectrum of methyl phosphonic difluoride has been reinvestigated using a pulsed-molecular-beam Fabry-Perot cavity microwave spectrometer. The enhanced resolution of the Fourier transform microwave (FTMW) spectrometer (compared to the

Interstellar Isomers: The Importance of Bonding Energy Differences

October 10, 2005
Author(s)
A J. Remijan, J M. Hollis, Francis J. Lovas, David F. Plusquellic, P R. Jewell
We present new observations of large cyanide molecules and their corresponding isocyanide isomers toward the Sgr B2(N)molecular cloud. We report the first detection of the JK=10-00 transition of methyl isocyanide (CH3NC) with the 100-m Green Bank Telescope

Interstellar Chemistry: A Strategy for Detecting Polycyclic Aromatic Hydrocarbons in Space

March 1, 2005
Author(s)
Francis J. Lovas, R J. McMahon, J-U Grabow, M Schnell, J Mack, L T. Scott, R L. Kuczkowski
Polycyclic aromatic hydrocarbons (PAHs) represent important targets for radio astronomy because they offer the possibilities of validating the PAH hypothesis and revealing new insight into the chemistry of interstellar space. Polycyclic aromatic

A Rigorous Attempt to Verify Interstellar Glycine

February 1, 2005
Author(s)
Lewis E. Snyder, Francis J. Lovas, J M. Hollis, Douglas N. Friedel, P R. Jewell, A Remijan, Vadim V. Ilyushin, E A. Alekseev, S K. Dyubko
In 2003, Kuan, Charnley, and co-workers claimed the detection of interstellar glycine (NH2 CH2COOH) based on the detection of 27 lines in 19 different spectral bands in one or more of the sources Sgr B2(N-LMH), Orion KL, and W51 e1/e2. They supported their

Green Bank Telescope Detection of New Interstellar Aldehydes: Propenal and Propanal

July 1, 2004
Author(s)
J M. Hollis, P R. Jewell, Francis J. Lovas, A Remijan, H Mollendal
The new interstellar molecules propenal (CH2CHCHO) and propanal (CH3CH2CHO) have been detected largely in absorption toward the star-forming region Sagittarius B2(N) by means of rotational transitions observed with the 100 m Green Bank Telescope (GBT)

Rotational Spectra, Conformational Structures and Dipole Moments of Thiodiglycol by Jet-Cooled FTMW and Ab Initio Calculations

May 1, 2004
Author(s)
L H. Xu, Q Liu, R D. Suenram, Francis J. Lovas, Angela R. Hight Walker, J O. Jensen, A C. Samuels
The rotational spectra of three low-energy conformers of thiodiglycol (TDG) (HOCH2CH2SCH2CH2OH) have been measured in a molecular beam using a pulsed-nozzle Fourier-transform microwave spectrometer. To determine the likely conformational structures with ab

Interstellar Antifreeze: Ethylene glycol

April 1, 2004
Author(s)
J M. Hollis, Francis J. Lovas, P R. Jewell, L H. Coudert
Interstellar ethylene glycol (HOCH2CH2OH) has been detected in emission toward the Galactic center source Sagittarius B2( N-LMH) by means of several millimeter-wave rotational torsional transitions of its lowest energy conformer. The types and kinds of