First Detection of HCO$^+$ Absorption in the Magellanic System
作者： Claire E. Murray , Snežana Stanimirovic´ , N. M. McClure-Griffiths , M. E. Putman , H. S. Liszt
DOI: 10.1088/0004-637X/808/1/41
关键词:
摘要: We present the first detection of HCO$^+$ absorption in Magellanic System. Using Australia Telescope Compact Array (ATCA), we observed 9 extragalactic radio continuum sources behind System and detected towards one source located leading edge Bridge. The is at LSR velocity $v=214.0 \pm 0.4\rm\,km\,s^{-1}$, with a full width half maximum $\Delta v=4.5\pm 1.0\rm\,km\,s^{-1}$ optical depth $\tau(\rm HCO^+)=0.10\pm 0.02$. Although there abundant neutral hydrogen (HI) surrounding sightline position-velocity space, exact location absorber HI column density low, $<10^{20}\rm\,cm^{-2}$, little evidence for dust or CO emission from Planck observations. While origin survival molecules such diffuse environment remains unclear, dynamical events as flows cloud collisions this interacting system likely play an important role.
arxiv.org
sci-hub.se 参考文章(69)
N. Lehner, FUSE OBSERVATIONS OF THE MAGELLANIC BRIDGE GAS TOWARD TWO EARLY-TYPE STARS: MOLECULES, PHYSICAL CONDITIONS, AND RELATIVE ABUNDANCES arXiv: Astrophysics. ,(2002) , 10.1086/342349
David L. Nidever, W. Butler Burton, Lou Nigra, Steven R. Majewski, The 200 Degree-Long Magellanic Stream System arXiv: Astrophysics of Galaxies. ,(2010) , 10.1088/0004-637X/723/2/1618
Nick Indriolo, D. A. Neufeld, M. Gerin, P. Schilke, A. O. Benz, B. Winkel, K. M. Menten, E. T. Chambers, John H. Black, S. Bruderer, E. Falgarone, B. Godard, J. R. Goicoechea, H. Gupta, D. C. Lis, V. Ossenkopf, C. M. Persson, P. Sonnentrucker, F. F. S. van der Tak, E. F. van Dishoeck, Mark G. Wolfire, F. Wyrowski, Herschel Survey of Galactic OH+, H2O+, and H3O+: Probing the Molecular Hydrogen Fraction and Cosmic-Ray Ionization Rate The Astrophysical Journal. ,vol. 800, pp. 40- 65 ,(2015) , 10.1088/0004-637X/800/1/40
Farhan Feroz, M.P. Hobson, Multimodal nested sampling: an efficient and robust alternative to Markov Chain Monte Carlo methods for astronomical data analyses Monthly Notices of the Royal Astronomical Society. ,vol. 384, pp. 449- 463 ,(2008) , 10.1111/J.1365-2966.2007.12353.X
Tim W. Connors, Daisuke Kawata, Brad K. Gibson, N-body simulations of the Magellanic stream Monthly Notices of the Royal Astronomical Society. ,vol. 371, pp. 108- 120 ,(2006) , 10.1111/J.1365-2966.2006.10659.X
N. Mizuno, E. Muller, H. Maeda, A. Kawamura, T. Minamidani, T. Onishi, A. Mizuno, Y. Fukui, Detection of Molecular Clouds in the Magellanic Bridge: Candidate Star Formation Sites in a Nearby Low-Metallicity System The Astrophysical Journal. ,vol. 643, pp. 107- 110 ,(2006) , 10.1086/505298
Mary E. Putman, Lister Staveley‐Smith, Kenneth C. Freeman, Brad K. Gibson, David G. Barnes, The Magellanic Stream, High-Velocity Clouds, and the Sculptor Group The Astrophysical Journal. ,vol. 586, pp. 170- 194 ,(2003) , 10.1086/344477
C. Yozin, K. Bekki, Evolution of dust and molecular hydrogen in the Magellanic System Monthly Notices of the Royal Astronomical Society. ,vol. 443, pp. 522- 546 ,(2014) , 10.1093/MNRAS/STU1132
Ade Abergel, Peter AR Ade, N Aghanim, MIR Alves, G Aniano, C Armitage-Caplan, M Arnaud, M Ashdown, F Atrio-Barandela, J Aumont, C Baccigalupi, AJ Banday, RB Barreiro, JG Bartlett, E Battaner, K Benabed, A Benoît, A Benoit-Lévy, J-P Bernard, M Bersanelli, P Bielewicz, J Bobin, JJ Bock, A Bonaldi, JR Bond, J Borrill, FR Bouchet, F Boulanger, M Bridges, M Bucher, C Burigana, RC Butler, J-F Cardoso, A Catalano, A Chamballu, R-R Chary, HC Chiang, L-Y Chiang, PR Christensen, S Church, M Clemens, DL Clements, S Colombi, LPL Colombo, C Combet, F Couchot, A Coulais, BP Crill, A Curto, F Cuttaia, L Danese, RD Davies, RJ Davis, P De Bernardis, A De Rosa, G De Zotti, J Delabrouille, J-M Delouis, F-X Désert, C Dickinson, JM Diego, H Dole, S Donzelli, O Doré, M Douspis, Bruce T Draine, X Dupac, G Efstathiou, TA Enßlin, HK Eriksen, E Falgarone, F Finelli, O Forni, M Frailis, AA Fraisse, E Franceschi, S Galeotta, K Ganga, T Ghosh, M Giard, G Giardino, Y Giraud-Héraud, J González-Nuevo, KM Górski, S Gratton, A Gregorio, IA Grenier, A Gruppuso, V Guillet, Frode Kristian Hansen, D Hanson, DL Harrison, G Helou, S Henrot-Versillé, Carlos Hernández-Monteagudo, D Herranz, SR Hildebrandt, E Hivon, M Hobson, WA Holmes, Allan Hornstrup, W Hovest, Kevin M Huffenberger, AH Jaffe, TR Jaffe, J Jewell, G Joncas, William C Jones, M Juvela, E Keihänen, R Keskitalo, TS Kisner, J Knoche, L Knox, M Kunz, H Kurki-Suonio, G Lagache, A Lähteenmäki, J-M Lamarre, A Lasenby, RJ Laureijs, CR Lawrence, R Leonardi, J León-Tavares, J Lesgourgues, F Levrier, Michele Liguori, Per Barth Lilje, Michael Linden-Vørnle, M López-Caniego, PM Lubin, JF Macías-Pérez, B Maffei, D Maino, N Mandolesi, M Maris, DJ Marshall, PG Martin, E Martínez-González, S Masi, Marcella Massardi, S. Matarrese, F Matthai, P Mazzotta, P McGehee, A Melchiorri, L Mendes, A Mennella, M Migliaccio, Susanta Mitra, None, Planck 2013 results. XI. All-sky model of thermal dust emission Astronomy and Astrophysics. ,vol. 571, pp. 1- 37 ,(2014) , 10.1051/0004-6361/201323195
Daniel E. Welty, Tony Wong, Rui Xue, Interstellar H I and H2 in the Magellanic Clouds: An expanded sample based on ultraviolet absorption-line data The Astrophysical Journal. ,vol. 745, pp. 173- ,(2012) , 10.1088/0004-637X/745/2/173