L. Armus
University of Connecticut
65 Papers
5.2K Citations
L. Armus is an academic researcher from University of Connecticut. The author has contributed to research in topics: Galaxy & Star formation. The author has an hindex of 33, co-authored 65 publications.
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Papers
The Mid-Infrared Spectrum of Star-Forming Galaxies: Global Properties of PAH Emission
J. D. T. Smith,Bruce T. Draine,Daniel A. Dale,John Moustakas,Robert C. Kennicutt,George Helou,L. Armus,H. Roussel,Kartik Sheth,George J. Bendo,B. A. Buckalew,D. Calzetti C. W. Engelbracht,Karl D. Gordon,D. J. Hollenbach,Aigen Li,S. Malhotra,Eric J. Murphy,Fabian Walter +17 more
TL;DR: In this article, a sample of low-resolution 5-38um Spitzer IRS spectra of the inner few square kiloparsecs of 59 nearby galaxies spanning a large range of star formation properties is presented, and a robust method for decomposing mid-infrared galaxy spectra is described, and used to explore the behavior of PAH emission and the prevalence of silicate dust extinction.
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Calibrating Extinction-Free Star Formation Rate Diagnostics with 33GHz Free-Free Emission in NGC6946
Eric J. Murphy,J. J. Condon,Eva Schinnerer,Robert C. Kennicutt,D. Calzetti,L. Armus,George Helou,Jean L. Turner,G. Aniano,P. Beirao,Alberto D. Bolatto,Bernhard R. Brandl,K. V. Croxall,Daniel A. Dale,J. Donovan Meyer,Bruce T. Draine,C. W. Engelbracht,L. K. Hunt,C.-N. Hao,Jin Koda,H. Roussel,R. Skibba,J. D. T. Smith +22 more
TL;DR: In this paper, free-free emission measured in the Ka-band (26-40GHz) for 10 star-forming regions in the nearby galaxy NGC6946, including its starbursting nucleus, was compared with a number of SFR diagnostics that are typically considered to be unaffected by interstellar extinction: nonthermal radio (i.e., 1.4GHz), total infrared (IR; 8-1000um), and warm dust (i., 24um) emission, along with the hybrid (obscured + unobscured) indicators of H\alpha+
Star Formation in NGC5194 (M51a): The Panchromatic View from GALEX to Spitzer
D. Calzetti,Robert C. Kennicutt,Luciana Bianchi,D. A. Thilker,Daniel A. Dale,C. W. Engelbracht,Claus Leitherer,Martin Meyer,M. Sosey,Max Mutchler,Michael W. Regan,Michele D. Thornley,L. Armus,George J. Bendo,Samuel Boissier,A. Boselli,Bruce T. Draine,Karl D. Gordon,George Helou,D. J. Hollenbach,L. J. Kewley,B. F. Madore,D. C. Martin,Eric J. Murphy,George Rieke,M. J. Rieke,H. Roussel,Kartik Sheth,J. D. T. Smith,Fabian Walter,B. A. White,S. Yi,Nick Scoville,M. Polletta,D. J. Lindler +34 more
TL;DR: In this article, the authors used far ultraviolet to far infrared images of the nearby galaxy NGC5194, from Spitzer, GALEX, Hubble Space Telescope and ground-based data, to investigate local and global star formation, and the impact of dust extinction in HII-emitting knots.
439
Mid-IR Galaxy Classification Based on Silicate Obscuration and PAH Equivalent Width
Henrik Spoon,Jason Marshall,J. R. Houck,M. Elitzur,Lei Hao,L. Armus,Bernhard R. Brandl,V. Charmandaris +7 more
TL;DR: In this article, the authors present a diagnostic diagram for mid-infrared spectra of infrared galaxies based on the equivalent width of the 6.2 micron PAH emission feature and the strength of the 9.7 micron silicate feature.
Black hole accretion and star formation as drivers of gas excitation and chemistry in Mrk231
P. van der Werf,K. G. Isaak,Rowin Meijerink,Marco Spaans,A. Rykala,Trevor Fulton,A. F. Loenen,Fabian Walter,Axel Weiss,L. Armus,J. Fischer,Frank P. Israel,Andrew I. Harris,Sylvain Veilleux,Carsten Henkel,Giorgio Savini,S. D. Lord,Howard A. Smith,Eduardo González-Alfonso,David A. Naylor,Susanne Aalto,V. Charmandaris,Kalliopi Dasyra,Aaron S. Evans,Yang Gao,Thomas R. Greve,Rolf Guesten,C. Kramer,Jesús Martín-Pintado,Joseph M. Mazzarella,Philippos Papadopoulos,D. B. Sanders,Luigi Spinoglio,Gordon J. Stacey,C. Vlahakis,Martina C. Wiedner,E. M. Xilouris +36 more
TL;DR: In this paper, a full high-resolution SPIRE FTS spectrum of the nearby ultraluminous infrared galaxy Mrk231 is presented, including 25 lines, including CO J=5-4 through J=13-12, 7 rotational lines of H2O, 3 of OH+ and one line each of H 2O+, CH+, and HF.