L. E. Snyder et al. 2005 ApJ 619 914 doi:10.1086/426677
A Rigorous Attempt to Verify Interstellar Glycine
FREEL. E. Snyder1, F. J. Lovas2, J. M. Hollis3, D. N. Friedel1, P. R. Jewell4, A. Remijan1,3,5, V. V. Ilyushin6, E. A. Alekseev6 and S. F. Dyubko6
Show affiliationsIn 2003, Kuan and coworkers reported the detection of interstellar glycine (NH2CH2COOH) based on observations 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 detection report with rotational temperature diagrams for all three sources. In this paper we present essential criteria that can be used in a straightforward analysis technique to confirm the identity of an interstellar asymmetric rotor such as glycine. We use new laboratory measurements of glycine as a basis for applying this analysis technique, both to our previously unpublished 12 m telescope data and to the previously published Swedish-ESO Submillimetre Telescope (SEST) data of Nummelin and colleagues. We conclude that key lines necessary for an interstellar glycine identification have not yet been found. We identify some common molecular candidates that should be examined further as more likely carriers of several of the lines reported as glycine. Finally, we illustrate that a rotational temperature diagram used without the support of correct spectroscopic assignments is not a reliable tool for the identification of interstellar molecules.
- Subject headings
ISM: abundances; ISM: clouds; ISM: individual (Sagittarius B2(N-LMH), Orion Kleinmann-Low, W51 e1/e2); ISM: molecules; radio lines: ISM
- Dates
-
Issue 2 (2005 February 1)
Received 2004 May 25, accepted for publication 2004 October 7
-
A Rigorous Attempt to Verify Interstellar Glycine
L. E. Snyder et al. 2005 ApJ 619 914
-
Episodic Accretion at Early Stages of Evolution of Low-Mass Stars and Brown Dwarfs: A Solution for the Observed Luminosity Spread in H-R Diagrams?
I. Baraffe et al 2009 ApJ 702 L27
-
Random matrices close to Hermitian or unitary: overview of methods and results
Yan V Fyodorov and H-J Sommers 2003 J. Phys. A: Math. Gen. 36 3303
-
Compton-dragged Gamma-Ray Bursts Associated with Supernovae
Davide Lazzati et al 2000 ApJ 529 L17
-
Lifetime interference effect on the angular distribution of the Auger electron emission following resonant Auger decay from 2p
4s photoexcited Ar
K Ueda et al 1999 J. Phys. B: At. Mol. Opt. Phys. 32 L291
-
Black-hole entropy from quantum geometry
Marcin Domagala and Jerzy Lewandowski 2004 Class. Quantum Grav. 21 5233
-
On the Snow Line in Dusty Protoplanetary Disks
D. D. Sasselov and M. Lecar 2000 ApJ 528 995
-
Power dissipation in nanoscale conductors: classical, semi-classical and quantum dynamics
Andrew P Horsfield et al 2004 J. Phys.: Condens. Matter 16 3609
-
Reduction of the ordered magnetic moment in YMnO3 with hydrostatic pressure
M Janoschek et al 2005 J. Phys.: Condens. Matter 17 L425
-
Einstein's Jury: The Race to Test Relativity
Jürgen Ehlers 2007 Class. Quantum Grav. 24 5313
Users also read
What's this?- The Lifetimes of Nitriles (CN) and Acids (COOH) during Ultraviolet Photolysis and Their Survival in Space
- Mechanisms of Amino Acid Formation in Interstellar Ice Analogs
- Interstellar Glycine