J
John H. Black
Researcher at Chalmers University of Technology
Publications - 356
Citations - 21799
John H. Black is an academic researcher from Chalmers University of Technology. The author has contributed to research in topics: Molecular cloud & Interstellar medium. The author has an hindex of 67, co-authored 348 publications receiving 20358 citations. Previous affiliations of John H. Black include University of Arizona & Max Planck Society.
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Journal ArticleDOI
Nitrogen hydrides in interstellar gas: Herschel/HIFI observations towards G10.6-0.4 (W31C)
Carina M. Persson,John H. Black,José Cernicharo,Javier R. Goicoechea,G. E. Hassel,Eric Herbst,Maryvonne Gerin,M. De Luca,T. A. Bell,Audrey Coutens,E. Falgarone,P. F. Goldsmith,H. Gupta,M. Kazmierczak,Dariusz C. Lis,Bhaswati Mookerjea,David A. Neufeld,John E. Pearson,Thomas G. Phillips,Paule Sonnentrucker,J. Stutzki,Charlotte Vastel,Shanshan Yu,F. Boulanger,Emmanuel Dartois,P. J. Encrenaz,Thomas R. Geballe,Thomas F. Giesen,Benjamin Godard,Cecile Gry,Patrick Hennebelle,P. Hily-Blant,C. Joblin,Robert Kołos,Jacek Krełowski,Jesús Martín-Pintado,Karl M. Menten,Raquel Monje,M. Perault,Rene Plume,M. Salez,Stephan Schlemmer,M. R. Schmidt,D. Teyssier,I. Peron,P. Cais,P. Gaufre,A. Cros,L. Ravera,Patrick W. Morris,S. D. Lord,P. Planesas +51 more
TL;DR: The HIFI instrument on board the Herschel Space Observatory has been used to observe interstellar nitrogen hydrides along the sight-line towards G10.4 in order to improve our understanding of the interstellar chemistry of nitrogen.
Journal ArticleDOI
Molecules in harsh environments
TL;DR: In this article, the abundance and excitation of reactive molecular ions such as H2+, CH+ and CO+ are discussed with reference to recent observations of nebular boundary layers, such as that in the hypothesized molecular tori surrounding active galactic nuclei.
Journal ArticleDOI
Herschel/HIFI measurements of the ortho/para ratio in water towards Sagittarius B2(M) and W31C
Dariusz C. Lis,Thomas G. Phillips,Paul F. Goldsmith,David A. Neufeld,Eric Herbst,Claudia Comito,Peter Schilke,Peter Schilke,H. S. P. Mueller,Edwin A. Bergin,Maryvonne Gerin,Maryvonne Gerin,Tom Bell,Martin Emprechtinger,John H. Black,Geoffrey A. Blake,F. Boulanger,Emmanuel Caux,Cecilia Ceccarelli,José Cernicharo,Audrey Coutens,Nathan R. Crockett,F. Daniel,F. Daniel,F. Daniel,Emmanuel Dartois,M. De Luca,M. De Luca,M.-L. Dubernet,P. J. Encrenaz,P. J. Encrenaz,Edith Falgarone,Edith Falgarone,Thomas R. Geballe,B. Godard,B. Godard,Thomas F. Giesen,Javier R. Goicoechea,Cecile Gry,Harshal Gupta,Patrick Hennebelle,Patrick Hennebelle,P. Hily-Blant,Robert Kołos,Jacek Krełowski,Christine Joblin,Doug Johnstone,M. Kazmierczak,S. D. Lord,Sébastien Maret,Peter G. Martin,Jesús Martín-Pintado,G. Melnick,Karl M. Menten,Raquel Monje,Bhaswati Mookerjea,Patrick W. Morris,J. A. Murphy,Volker Ossenkopf,John C. Pearson,Michel Perault,Michel Perault,Carina M. Persson,Rene Plume,S.-L. Qin,M. Salez,M. Salez,Stephan Schlemmer,M. R. Schmidt,Paule Sonnentrucker,J. Stutzki,D. Teyssier,Neil Trappe,van der Floris Tak,Charlotte Vastel,S. Wang,Harold W. Yorke,Shanshan Yu,Jonas Zmuidzinas,Adwin Boogert,Neal R. Erickson,Alexandre Karpov,Jacob Kooi,F. W. Maiwald,Rudolf Schieder,P. Zaal +85 more
TL;DR: In this article, the fundamental rotational transitions of ortho- and para-H 16 Oa nd H 18 O in absorption towards Sagittarius B2(M) and W31C were observed and a low ortho/para ratio of 2.35± 0.35 was derived.
Journal ArticleDOI
A New Measurements of the Cosmic Microwave Background Radiation Temperature at z = 1.97
TL;DR: In this paper, the excitation temperature between the J = 0 and J = 1 fine-structure levels of C I is 11.6 $\pm$ 1.0 K at 0.61 mm and z = 1.9731.
Journal ArticleDOI
An Observational Determination of the Proton to Electron Mass Ratio in the Early Universe
Rodger I. Thompson,Jill Bechtold,John H. Black,Daniel J. Eisenstein,Xiaohui Fan,Robert C. Kennicutt,Robert C. Kennicutt,Carlos Martins,Carlos Martins,J. Xavier Prochaska,Yancey L. Shirley +10 more
TL;DR: In this article, the authors used the same data used in the earlier studies to resolve the discrepancy between two measurements of the fundamental constant μ, the proton to electron mass ratio, at early times in the universe.