Výsledky vyhledávání

Simultaneous Determination of the Cosmic Ray Ionization Rate and Fractional Ionization in DR 21(OH)

Autor: Charlotte Vastel, Talayeh Hezareh, Martin Houde, Ruisheng Peng, C. McCoey

Publikováno v: The Astrophysical Journal. 684:1221-1227

We present a new method for the simultaneous calculation of the cosmic ray ionization rate, zeta(H2), and the ionization fraction, chi(e), in dense molecular clouds. A simple network of chemical reactions dominant in the creation and destruction of H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::197380d71d0039f6f7944f79800f405f
https://doi.org/10.1086/590365

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On the excitation of the infrared knots in the HH99 outflow

Autor: T. Giannini, A. Caratti o Garatti, C. McCoey, D. R. Flower

Publikováno v: Monthly Notices of the Royal Astronomical Society. 353:813-824

We present near infrared (IR) spectra (0.98--2.5 mu m) from the group of Herbig-Haro (HH) objects comprising HH99: a series of knots forming a bow, HH99B, and a separate knot, HH99A. Observations of H2, [Fe II] and [C I] are used to constrain shock m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e2656fb5a9c7057e384458849e7ad412
https://doi.org/10.1111/j.1365-2966.2004.08109.x

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The origin of organic emission in NGC 2071

Autor: T. A. van Kempen, S. Tisi, C. McCoey, Doug Johnstone, M. Fich

Publikováno v: Astronomy & Astrophysics, 569, A53
Astronomy & Astrophysics

Context: The physical origin behind organic emission in embedded low-mass star formation has been fiercely debated in the last two decades. A multitude of scenarios have been proposed, from a hot corino to PDRs on cavity walls to shock excitation. Ai

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d8643e6ed75cdd567daa4f982705d83
http://arxiv.org/abs/1407.2426

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OH far-infrared emission from low- and intermediate-mass protostars surveyed with Herschel-PACS

Autor: Javier R. Goicoechea, Alain Baudry, S. F. Wampfler, Simon Bruderer, C. McCoey, Lars E. Kristensen, Steven D. Doty, Gregory J. Herczeg, E. F. van Dishoeck, Agata Karska, T. Giannini, Arnold O. Benz, B. Larsson

Publikováno v: Astronomy & Astrophysics, 552, A56
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 552, pp.id.A56. ⟨10.1051/0004-6361/201219929⟩
Wampfler, S F, Bruderer, S, Karska, A, J. Herczeg, G, F. van Dishoeck, E, E. Kristensen, L, R. Goicoechea, J, O. Benz, A, D. Doty, S, McCoey, C, Baudry, A, Giannini, T & Larsson, B 2013, ' OH far-infrared emission from low-and intermediate-mass protostars surveyed with Herschel-PACS ', Astronomy & Astrophysics, vol. 552, A56 . https://doi.org/10.1051/0004-6361/201219929

OH is a key species in the water chemistry of star-forming regions, because its presence is tightly related to the formation and destruction of water. This paper presents OH observations from 23 low- and intermediate-mass young stellar objects obtain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da513d7104d4c2a6b6403f0e2254970d
https://hdl.handle.net/1887/59012

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Deuterated water in the solar-type protostars NGC 1333 IRAS 4A and IRAS 4B

Publikováno v: Coutens, A, Vastel, C, Cabrit, S, Codella, C, Kristensen, L E, Ceccarelli, C, van Dishoeck, E F, Boogert, A C A, Bottinelli, S, Castets, A, Caux, E, Comito, C, Demyk, K, Herpin, F, Lefloch, B, McCoey, C, Mottram, J C, Parise, B, Taquet, V, van der Tak, F F S, Visser, R & Yildiz, U A 2013, ' Deuterated water in the solar-type protostars NGC 1333 IRAS 4A and IRAS 4B ', Astronomy & Astrophysics, vol. 560, A39 . https://doi.org/10.1051/0004-6361/201322400
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2014, 560, pp.id.A39. ⟨10.1051/0004-6361/201322400⟩
Astronomy and Astrophysics-A&A, 2014, 560, pp.id.A39. ⟨10.1051/0004-6361/201322400⟩
Astronomy & Astrophysics, 560, A39
Astronomy and astrophysics, 560:A39. EDP Sciences

Aims. The aim of this paper is to study deuterated water in the solar-type protostars NGC1333 IRAS4A and IRAS4B, to compare their HDO abundance distribution with other star-forming regions, and to constrain their HDO/H2O ratios. Methods. Using the He

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c2b141ffd7e2ec5aade470b850f4ae0

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Herschel-HIFI observations of high-J CO and isotopologues in star-forming regions: from low- to high-mass

Autor: Doug Johnstone, Jonathan Braine, E. F. van Dishoeck, Joseph C. Mottram, Umut A. Yildiz, Ruud Visser, I. San Jose-Garcia, Fabrice Herpin, Friedrich Wyrowski, F. F. S. van der Tak, Lars E. Kristensen, C. McCoey

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2013, 553, pp.id.A125. ⟨10.1051/0004-6361/201220472⟩
Astronomy & Astrophysics, 553, A125
Astronomy & astrophysics, 553:A125. EDP Sciences

Context; Our understanding of the star formation process has traditionally been confined to certain mass or luminosity boundaries because most studies focus only on low-, intermediate- or high-mass star-forming regions. As part of the "Water In Star-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b91e85d49f3af1a44eb7471f9952d2d3
https://hal.archives-ouvertes.fr/hal-00786925

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In-orbit performance of Herschel-HIFI

Autor: N. Whyborn, Per Bjerkeli, Pieter R. Roelfsema, Dominicus Kester, L. Dubbeldam, Q. Xie, Claudia Comito, Z. Nagy, A. Marston, R. Moreno, J. Rector, C. Gal, M. H. D. van der Wiel, M. Akyilmaz, Christian Leinz, Michael Olberg, Miriam Rengel, Mihkel Kama, T. Klein, D. R. Higgins, Tomasz S. Kaminski, Yoko Okada, E. Sánchez-Suárez, S. Pacheco, G. de Lange, J. Stutzki, I. M. Avruch, W. Salomons, R. Assendorp, Tom Bell, R. Shipman, W. Nowosielski, O. Coeur-Joly, Volker Ossenkopf, Adwin Boogert, C. Kramer, W. M. Laauwen, S. D. Lord, J. C. Pearson, M. Marseille, Rudolf Schieder, Piotr Orleanski, J. Braine, C. K. Wafelbakker, D. Rabois, C. McCoey, Marco Soldati, A. de Jonge, L. Ravera, Charlotte Vastel, Christopher Jarchow, S. Wang, F. Schlöder, F. Flederus, W. Luinge, Pieter Dieleman, Umut A. Yildiz, Robin Lombaert, Christophe Risacher, Emmanuel Caux, Nathan R. Crockett, B. Delforge, M. Melchior, M. De Luca, Willem Jellema, Fabrice Herpin, N. Biver, A. Lorenzani, Thomas G. Phillips, B. Thomas, Patrick W. Morris, K. Wildeman, E. De Beck, P. Zaal, Hideo Sagawa, Jesús Martín-Pintado, K. Edwards, R. Huisman, Colin Borys, M. Caris, Alexander G. G. M. Tielens, Michel Fich, Jacob Kooi, Th. de Graauw, M. Michalska, Z. Makai, M. Xilouris, A. Hoac, Frank Helmich, Thibault Cavalié, F. Schmülling, Bengt Larsson, D. A. Beintema, A. M. di Giorgio, José Cernicharo, Holger S. P. Müller, Bertrand Lefloch, D. Teyssier, Pierre Hily-Blant

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2012, 537, pp.17. ⟨10.1051/0004-6361/201015120⟩
Astronomy and Astrophysics-A&A, EDP Sciences, 2012, 537, pp.17. ⟨10.1051/0004-6361/201015120⟩
Astronomy & astrophysics, 537:A17. EDP Sciences

International audience; Aims: In this paper the calibration and in-orbit performance of the Heterodyne Instrument for the Far-Infrared (HIFI) is described. Methods: The calibration of HIFI is based on a combination of ground and in-flight tests. Dedi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a55f0c7a551d8db558611f676defcf7e
https://hal.science/hal-00664361

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Herschel observations of the Herbig-Haro objects HH52-54

Autor: Kay Justtanont, G. J. Herczeg, A. O. H. Olofsson, C. McCoey, René Liseau, Per Bergman, Mario Tafalla, Odysseas Dionatos, Brunella Nisini, M. Benedettini, Per Bjerkeli, Teresa Giannini, Bengt Larsson, Michael Olberg

Publikováno v: Bjerkeli, P, Liseau, R, Nisini, B, Tafalla, M, Benedettini, M, Bergman, P, Dionatos, O, Giannini, T, Herczeg, G J, Justtanont, K, Larsson, B, McCoey, C, Olberg, M & Olofsson, A O H 2011, ' Herschel observations of the Herbig-Haro objects HH52-54 ', Astronomy & Astrophysics, vol. 533, A80 . https://doi.org/10.1051/0004-6361/201116846

We are aiming at the observational estimation of the relative contribution to the cooling by CO and H2O, as this provides decisive information for the understanding of the oxygen chemistry behind interstellar shock waves. Methods. The high sensitivit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43589ffdc1e3d1f45a6b092855f006e2

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