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We present the first mid-infrared (MIR) detections of HNC and H13CN in the interstellar medium, and numerous, resolved HCN rovibrational transitions. Our observations span 12.8 to 22.9 micron towards the hot core Orion IRc2, obtained with…

Spectrally-resolved observations of three pure rotational lines of H$_2$, conducted with the EXES instrument on SOFIA toward the classic bow shock HH7, reveal systematic velocity shifts between the S(5) line of ortho-H$_2$ and the two…

Astrophysics of Galaxies · Physics 2019-06-19 David A. Neufeld , Curtis DeWitt , Pierre Lesaffre , Sylvie Cabrit , Antoine Gusdorf , Le Ngoc Tram , Matthew Richter

We report on sensitive far-infrared observations of $^{12}$CO pure rotational transitions in the OMC-1 core of Orion. The lines were observed with the Long Wavelength Spectrometer (LWS) in the grating mode on board the Infrared Space…

Using the Short-Wavelength-Spectrometer on the Infrared Space Observatory (ISO), we obtained near- and mid-infrared spectra toward the brightest H_2 emission peak of the Orion OMC-1 outflow. A wealth of emission and absorption features were…

Astrophysics · Physics 2007-05-23 Dirk Rosenthal , Frank Bertoldi , Siegfried Drapatz

We report the first detection of the S(1) pure rotational line of ortho-H2 at 17.04 um in an asymptotic giant branch star, using observations of IRC+10216 with the Echelon-cross-echelle Spectrograph (EXES) mounted on the Stratospheric…

Solar and Stellar Astrophysics · Physics 2022-03-30 J. P. Fonfría , C. N. DeWitt , E. J. Montiel , J. Cernicharo , M. J. Richter

Using the EXES instrument on SOFIA, we have obtained velocity-resolved spectra of several pure rotational lines of H2 toward shocked molecular gas within three Galactic sources: the supernova remnant (SNR) IC443 (Clump C), a protostellar…

Astrophysics of Galaxies · Physics 2024-10-08 David A. Neufeld , Curtis DeWitt , Pierre Lesaffre , Sylvie Cabrit , Antoine Gusdorf , Le Ngoc Tram , William T. Reach

We have detected the S(1), S(2), S(3), S(4) and S(5) pure rotational lines of molecular hydrogen toward the outflow source HH 54, using the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory (ISO). The observed H2…

Astrophysics · Physics 2007-05-23 David A. Neufeld , Gary J. Melnick , Martin Harwit

Photon Dominated Regions (PDRs) are interfaces between the mainly ionized and mainly molecular material around young massive stars. Analysis of the physical and chemical structure of such regions traces the impact of far-ultraviolet…

Astrophysics of Galaxies · Physics 2017-02-22 Z. Nagy , Y. Choi , V. Ossenkopf-Okada , F. F. S. van der Tak , E. A. Bergin , M. Gerin , C. Joblin , M. Roellig , R. Simon , J. Stutzki

We present a study of the sulfur-bearing species detected in a line confusion-limited survey towards Orion KL performed with the IRAM 30m telescope in the range 80-281 GHz. The study is part of an analysis of the line survey divided into…

Astrophysics of Galaxies · Physics 2015-06-16 G. B. Esplugues , B. Tercero , J. Cernicharo , J. R. Goicoechea , Aina Palau , N. Marcelino , T. A. Bell

We have used the Herschel-HIFI instrument to observe both nuclear spin symmetries of amidogen (NH2) towards the high-mass star-forming regions W31C (G10.6-0.4), W49N (G43.2-0.1), W51 (G49.5-0.4) and G34.3+0.1. The aim is to investigate the…

Using the Texas Echelon Cross Echelle Spectrograph (TEXES) we mapped emission in the H_2 v = 0-0 S(1) and S(2) lines toward the Orion Bar PDR at 2" resolution. We also observed H_2 v = 0-0 S(4) at selected points toward the front of the…

Astrophysics · Physics 2009-11-11 K. N. Allers , D. T. Jaffe , J. H. Lacy , B. T. Draine , M. J. Richter

We present a fully sampled map covering the Orion Hot Core and dense molecular ridge, in the sub-millimeter J=6-5 rotational transition of 13CO, at 0.45 mm with a resolution of 13 arcsec and 0.5 km s^-1. The map covers 3 arc min by 2arc min…

Solar and Stellar Astrophysics · Physics 2015-05-20 T. L. Wilson , D. Muders , M. Dumke , C. Henkel , Jonathan H. Kawamura

We report on the detection of the ground-state rotational line of ortho-D2H+ at 1.477 THz (203 micron) using the German REceiver for Astronomy at Terahertz frequencies (GREAT) onboard the Stratospheric Observatory For Infrared Astronomy…

We have observed the 158 micron 2P3/2-2P1/2 fine-structure line of 12C II simultaneously with the F=2-1 and F=1-0 hyperfine components of this transition in 13C II in the Orion photodissociation region near theta1C . The line profiles were…

Astrophysics · Physics 2009-10-28 R. T. Boreiko , A. L. Betz

C$_2$H is one of the first radicals to be detected in the interstellar medium. Its higher rotational transitions have recently become available with the Herschel Space Observatory. We aim to constrain the physical parameters of the C$_2$H…

Astrophysics of Galaxies · Physics 2015-06-17 Z. Nagy , V. Ossenkopf , F. F. S. Van der Tak , A. Faure , Z. Makai , E. A. Bergin

We present in this paper mid-infrared (5-8~$\mu$m) spectroscopy toward the massive young binary W3~IRS~5, using the EXES spectrometer in high-resolution mode ($R\sim$50,000) from the NASA Stratospheric Observatory for Infrared Astronomy…

We present mid-infrared spectral maps of the NGC 1333 star forming region, obtained with the the Infrared Spectrometer on board the Spitzer Space Telescope. Eight pure H2 rotational lines, from S (0) to S (7), are detected and mapped. The…

We present a detailed analysis of acetylene (C$_2$H$_2$) and its isotopologues in the Orion IRc2 region, focusing on the determination of $^{12}$C/$^{13}$C isotopic ratios using high-resolution infrared spectra from SOFIA. By employing a…

Astrophysics of Galaxies · Physics 2025-08-27 Minkyu Lee , Jubin Park , Sehoon Oh , Myung-Ki Cheoun , Se Young Park

We present the results of a spectral line survey from 138.3 to 150.7 GHz toward Orion-KL. The observations were made using the 14 m radio telescope of Taeduk Radio Astronomy Observatory. Typical system temperatures were between 500 and 700…

Astrophysics · Physics 2009-10-31 Chang Won Lee , Se-Hyung Cho , Sung-Min Lee

We report the results of spectroscopic mapping observations carried out toward the Herbig-Haro objects HH7-11 and HH54 over the 5.2 - 37 micron region using the Infrared Spectrograph of the Spitzer Space Telescope. These observations have…

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