T
Tilak Hewagama
Researcher at University of Maryland, College Park
Publications - 78
Citations - 3124
Tilak Hewagama is an academic researcher from University of Maryland, College Park. The author has contributed to research in topics: Exoplanet & Planet. The author has an hindex of 23, co-authored 67 publications receiving 2903 citations. Previous affiliations of Tilak Hewagama include Goddard Space Flight Center.
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Journal ArticleDOI
Measurement of the Cosmic Microwave Background spectrum by the COBE FIRAS instrument
John C. Mather,Edward Cheng,D. A. Cottingham,Robert E. Eplee,Dale J. Fixsen,Tilak Hewagama,R. B. Isaacman,K. A. Jensen,S. S. Meyer,Peter D. Noerdlinger,S. M. Read,L. P. Rosen,Richard A. Shafer,Edward L. Wright,Charles L. Bennett,N. W. Boggess,Michael G. Hauser,T. Kelsall,Samuel H. Moseley,Robert F. Silverberg,George F. Smoot,Rainer Weiss,David T. Wilkinson +22 more
TL;DR: In this paper, the Far-Infrared Absolute Spectrophotomer (FIRAS) instrument on the Cosmic Background Explorer (COBE) satellite was used to obtain a blackbody spectrum within 3.4 x 10(exp -8) ergs/sq cm/s/sr cm over the frequency range from 2 to 20/cm (5-0.5 mm).
Journal ArticleDOI
Strong Release of Methane on Mars in Northern Summer 2003
Michael J. Mumma,Geronimo L. Villanueva,Geronimo L. Villanueva,Robert E. Novak,Tilak Hewagama,Tilak Hewagama,Boncho P. Bonev,Boncho P. Bonev,Michael A. DiSanti,Avi Mandell,Michael D. Smith +10 more
TL;DR: Using high-dispersion infrared spectrometers at three ground-based telescopes, methane and water vapor were measured simultaneously on Mars over several longitude intervals in northern early and late summer in 2003 and near the vernal equinox in 2006.
Journal ArticleDOI
Far-infrared spectral observations of the galaxy by cobe
William T. Reach,Eli Dwek,Dale J. Fixsen,Tilak Hewagama,John C. Mather,Richard A. Shafer,A. J. Banday,Charles L. Bennett,Edward Cheng,R. E. Eplee,David Leisawitz,Philip Lubin,S. M. Read,L. P. Rosen,F. G. D. Shuman,George F. Smoot,T. J. Sodroski,Edward L. Wright +17 more
TL;DR: In this paper, the authors derived the Galactic continuum spectra from 5-96 cm(-1) from COBE/FIRAS observations and found that the spectra are dominated by warm dust emission, which may be fitted with a single temperature in the range 16-21 K along each line of sight.
Journal ArticleDOI
Morphology of the interstellar cooling lines detected by cobe
Charles L. Bennett,Dale J. Fixsen,Gary Hinshaw,John C. Mather,S. H. Moseley,Edward L. Wright,R. E. Eplee,J.M. Gales,Tilak Hewagama,R. B. Isaacman,Richard A. Shafer,Kevin R. Turpie +11 more
TL;DR: In this article, the results of an unbiased survey of far-infrared emission from the COBE satellite were reported, which includes emission lines from 158 micrometer C(+), 122 and 205 micrometers N(+), 370 and 609 micromer C(0), and CO J = 2 goes to 1 through J = 5 goes to 4.
Journal ArticleDOI
Scientific rationale for Uranus and Neptune in situ explorations
O. Mousis,David H. Atkinson,Thibault Cavalié,Leigh N. Fletcher,Michael Amato,Shahid Aslam,Francesca Ferri,Jean-Baptiste Renard,Tom Spilker,Ethiraj Venkatapathy,Peter Wurz,Karen Aplin,Athena Coustenis,Magali Deleuil,Michel Dobrijevic,T. Fouchet,Tristan Guillot,Paul Hartogh,Tilak Hewagama,Tilak Hewagama,Mark Hofstadter,Vincent Hue,Ricardo Hueso,Jean-Pierre Lebreton,E. Lellouch,Julianne I. Moses,G. S. Orton,John C. Pearl,Agustín Sánchez-Lavega,Amy Simon,Olivia Venot,J. H. Waite,Richard K. Achterberg,Sushil K. Atreya,F. Billebaud,Michel Blanc,Fabien Borget,B. Brugger,Sébastien Charnoz,Thierry Chiavassa,Valeria Cottini,Louis Le Sergeant d'Hendecourt,Grégoire Danger,T. Encrenaz,Nicolas Gorius,Laurent Jorda,Bernard Marty,R. Moreno,Andrew Morse,Conor A. Nixon,Kim Reh,Thomas Ronnet,François-Xavier Schmider,Simon Sheridan,Christophe Sotin,Pierre Vernazza,Geronimo L. Villanueva +56 more
TL;DR: In this article, the authors describe the main scientific goals to be addressed by a future in situ exploration of an ice giant, and a strawman ice-giant probe payload is described, with data returned to Earth using a Carrier Relay Spacecraft as a relay station.