The Arecibo Arp 220 spectral census - I. Discovery of the pre-biotic molecule methanimine and new cm-wavelength transitions of other molecules
作者： C. J. Salter , T. Ghosh , B. Catinella , M. Lebron , M. S. Lerner
DOI: 10.1088/0004-6256/136/1/389
关键词: Astrophysics 、 Absorption spectroscopy 、 Star formation 、 Excited state 、 Galaxy 、 Line (formation) 、 Spectral line 、 Absorption (electromagnetic radiation) 、 Megamaser 、 Physics
摘要: An on-going Arecibo line search between 1.1 and 10 GHz of the prototypical starburst/megamaser galaxy, Arp 220, has revealed a spectrum rich in molecular transitions. These include "pre-biotic" molecules: methanimine (CH2NH) emission, three v 2 = 1 direct l-type absorption lines HCN, an feature likely to be from either 18OH or formic acid (HCOOH). In addition, we report detection two, possibly three, transitions λ4 cm excited OH not previously detected 220 which are seen absorption, possible 6.668 methanol. This marks first distant extragalactic methanimine, pre-biotic molecule. Also, if confirmed, methanol presented here would represent at distance further than Mpc. strong, undetected, cm-wave HCN will aid study dense gas active star-forming regions this starburst galaxy.
harvard.edu
mpg.de
core.ac.uk
naic.edu 参考文章(66)
E. Momjian, J. D. Romney, C. L. Carilli, T. H. Troland, Sensitive Very Long Baseline Interferometry Studies of the OH Megamaser Emission from IRAS 17208–0014 The Astrophysical Journal. ,vol. 653, pp. 1172- 1179 ,(2006) , 10.1086/508699
Sarah J.U. Higdon, L. Armus, H. I. Teplitz, T. L. Herter, J. Bernard-Salas, G. C. Sloan, H. W. W. Spoon, J. A. Marshall, Y. Wu, J. R. Houck, L. Hao, D. Devost, B. R. Brandl, B. T. Soifer, V. Charmandaris, V. Charmandaris, V. Desai, Observations of Ultraluminous Infrared Galaxies with the Infrared Spectrograph on the Spitzer Space Telescope. II. The IRAS Bright Galaxy Sample The Astrophysical Journal. ,vol. 656, pp. 148- 167 ,(2007) , 10.1086/510107
N. Z. Scoville, D. B. Sanders, A. I. Sargent, B. T. Soifer, S. L. Scott, K. Y. Lo, Millimeter interferometry of the molecular gas in ARP 20 The Astrophysical Journal. ,vol. 311, ,(1986) , 10.1086/184796
S. Martin, R. Mauersberger, J. Martin‐Pintado, C. Henkel, S. Garcia‐Burillo, A 2 millimeter spectral line survey of the starburst galaxy NGC 253 Astrophysical Journal Supplement Series. ,vol. 164, pp. 450- 476 ,(2006) , 10.1086/503297
A. Lawrence, D. Walker, M. Rowan-Robinson, K. J. Leech, M. V. Penston, Studies of IRAS sources at high galactic latitudes – II. Results from a redshift survey at b > 60°: distribution in depth, luminosity function, and physical nature of IRAS galaxies Monthly Notices of the Royal Astronomical Society. ,vol. 219, pp. 687- 701 ,(1986) , 10.1093/MNRAS/219.3.687
Willem A. Baan, Infrared Properties of OH Galaxies The Astrophysical Journal. ,vol. 338, pp. 804- 811 ,(1989) , 10.1086/167237
Carol J. Lonsdale, Philip J. Diamond, Hannah Thrall, Harding E. Smith, Colin J. Lonsdale, VLBI IMAGES OF 49 RADIO SUPERNOVAE IN ARP 220 The Astrophysical Journal. ,vol. 647, pp. 185- 193 ,(2006) , 10.1086/505193
Yu Gao, Philip M. Solomon, HCN SURVEY OF NORMAL SPIRAL, INFRARED-LUMINOUS, AND ULTRALUMINOUS GALAXIES Astrophysical Journal Supplement Series. ,vol. 152, pp. 63- 80 ,(2004) , 10.1086/383003
F. J. Lovas, Recommended Rest Frequencies for Observed Interstellar Molecular Microwave Transitions—1985 Revision Journal of Physical and Chemical Reference Data. ,vol. 21, pp. 181- 272 ,(1986) , 10.1063/1.555771
N. Z. Scoville, A. S. Evans, R. Thompson, M. Rieke, D. C. Hines, F. J. Low, N. Dinshaw, J. A. Surace, L. Armus, NICMOS Imaging of Infrared-Luminous Galaxies The Astronomical Journal. ,vol. 119, pp. 991- 1061 ,(2000) , 10.1086/301248