# Browse Abstracts & Presentations - 2014 International Symposium on Molecular Spectroscopy by Subject "Mini-symposium: Astronomical Molecular Spectroscopy in the Age of ALMA"

• (International Symposium on Molecular Spectroscopy, 2014-06-17)
Determination of elemental isotopic ratios is valuable for understanding the chemical evolution of interstellar material. Until now the $^{12}$C/$^{13}$C ratio has predominantly been measured in simple species such as CO, ...

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• (International Symposium on Molecular Spectroscopy, 2014-06-17)
The protonated Ar ion $^{36}$ArH$^+$ has recently been identified in space,\footnote{Barlow et al., Science, 342, 1343 (2013)} in the Crab Nebula, from Herschel spectra. Its R(0) and R(1) transitions lie at 617.5 and ...

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Microsoft PowerPoint 2007 (4MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-20)
Being the simplest neutral open shell molecule, BeH is a very important benchmark system for \textit{ab initio} calculations. However, the most accurate empirical potentials and Born-Oppenheimer breakdown (BOB) functions ...

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Microsoft PowerPoint 2007 (502kB)
• (International Symposium on Molecular Spectroscopy, 2014-06-17)
This presentation will provide an overview of the ALMA Science Verification observations taken toward the Orion KL region - the most massive star forming region to the Solar System at a distance of $\sim$450 pc - in a 30 ...

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Microsoft PowerPoint 2007 (7MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-17)
We report the detection in IRC+10216 of lines of HNC J = 3-2 pertaining to nine excited vibrational states with energies up to $\sim$5300 K. The spectrum, observed with ALMA, also shows a surprising large number of narrow, ...

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Microsoft PowerPoint 2007 (11MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
Acetonitrile (\chem{CH_3CN}) is a well-known interstellar molecule whose vibrationally excited states need to be accounted for in searches for new molecules in the interstellar medium. To help catalog such `weed' molecules, ...

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Microsoft PowerPoint 2007 (2MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-20)
We report eight new ultra-high precision ($\pm$5 kHz) measurements of purely rotational $N(1\leftarrow0)$ transitions in several vibrational states of all stable isotopologues of the ground $X(1^{1}\Sigma^{+})$ -state ...

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PDF (394kB)
• (International Symposium on Molecular Spectroscopy, 2014-06-20)
Due to their role in determining the intensities of rotational transitions, accurate dipole moments are an important resource for evaluating the prospects of observing a candidate astromolecule. We have used high ...

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Microsoft PowerPoint 2007 (5MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-17)
The spectroscopy of molecular clouds probes their structure and kinematics from large to small spatial scales and covering a range of environments are of fundamental importance to understanding how clouds evolve to form ...

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Microsoft PowerPoint 2007 (19MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
We present a study of outflows driven by $\sim$30 protostars using CARMA 1.3 mm observations ($\sim$2.5$^{\prime\prime}$ resolution) of CO ({\it J} = 2 $\rightarrow$ 1) and SiO ({\it J} = 5 $\rightarrow$ 4). The sample is ...

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PDF (21MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
While the vast majority of stars in our galaxy will go through the Planetary Nebula (PN) stage near the end of their lives, these objects are not very well understood both physically and chemically. It has long been thought ...

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Microsoft PowerPoint 2007 (12MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
We have studied methanol, one of the so-called ‘astronomical weeds’, in the 215--265 GHz band. We have gathered a set of intensity calibrated, complete, experimental, and temperature resolved spectra from across the ...

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Microsoft PowerPoint 2007 (4MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
The torsional spectrum of C$_2$H$_6$ has been investigated from 220 to 330 cm$^{-1}$ to measure the intensity of the fundamental and the first torsional hot band needed for atmospheric studies of Titan. Several spectra ...

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Microsoft PowerPoint 2007 (3MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
We present spectral line surveys of 32 galactic sources using the Caltech Submillimeter Observatory (CSO) and the HIFI instrument on the Herschel Space Observatory. This study covers the 220~--~265~GHz frequency range using ...

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Microsoft PowerPoint 2007 (4MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-18)
With the advent of new broadband spectral line interferometric observations, we can now begin to fully characterize the spectra and distribution of complex organic molecules that have been largely ignored since their ...

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Microsoft PowerPoint 2007 (2MB)
• (International Symposium on Molecular Spectroscopy, 2014-06-19)
In this presentation several consequences of the plasma state with spatial structures will be discussed. The basic thought is that a concentration of neutral hydrogen gas in combination with weak magnetic fields will cause ...

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• (International Symposium on Molecular Spectroscopy, 2014-06-19)
We have conducted the first comprehensive mm-wave molecular emission line survey of the circumstellar disk orbiting the nearby, pre-main sequence (T Tauri) star LkCa 15 (D = $140$ pc). The outer disk is chemically rich, ...

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• (International Symposium on Molecular Spectroscopy, 2014-06-18)
The GBT PRebiotic Interstellar MOlecule Survey (PRIMOS) towards Sgr B2N is the deepest, most complete spectral line survey in the range of 300MHz - 49 GHz. PRIMOS enables astronomers, chemists, and biologists to test ...

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• (International Symposium on Molecular Spectroscopy, 2014-06-17)
Hydrides are key ingredients of interstellar chemistry since they are the initial products of chemical networks that lead to the formation of more complex molecules. The fundamental rotational transitions of light hydrides ...

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• (International Symposium on Molecular Spectroscopy, 2014-06-20)
According to the big bang theory, HeH$^+$ was the first molecule ever produced in our universe, along with He$_2^+$. It is also the simplest two-electron molecular system and lightest heteronuclear molecule, with a stable ...

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Microsoft PowerPoint 2007 (1MB)