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Your search keyword '"Sangeeta Malhotra"' showing total 2 results
Start Over Author "Sangeeta Malhotra" Journal publications of the astronomical society of the pacific
2 results on '"Sangeeta Malhotra"'

1. SINGS: TheSIRTFNearby Galaxies Survey

Author

Karl D. Gordon, Claus Leitherer, J. D. T. Smith, David Hollenbach, Sangeeta Malhotra, George Helou, George H. Rieke, Charles W. Engelbracht, Fabian Walter, Robert C. Kennicutt, Aigen Li, Daniela Calzetti, Daniel A. Dale, Lee Armus, Michele D. Thornley, Albert D. Grauer, George J. Bendo, Michael W. Regan, Hélène Roussel, Lisa J. Kewley, Bruce T. Draine, Marcia J. Rieke, and Thomas H. Jarrett

Subjects
Physics, Active galactic nucleus, Infrared, Star formation, media_common.quotation_subject, Astrophysics (astro-ph), Continuum (design consultancy), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Universe, Galaxy, Interstellar medium, Space and Planetary Science, Primary (astronomy), Astrophysics::Galaxy Astrophysics, media_common
Abstract

The SIRTF Nearby Galaxy Survey is a comprehensive infrared imaging and spectroscopic survey of 75 nearby galaxies. Its primary goal is to characterize the infrared emission of galaxies and their principal infrared-emitting components, across a broad range of galaxy properties and star formation environments. SINGS will provide new insights into the physical processes connecting star formation to the interstellar medium properties of galaxies, and provide a vital foundation for understanding infrared observations of the distant universe and ultraluminous and active galaxies. The galaxy sample and observing strategy have been designed to maximize the scientific and archival value of the data set for the SIRTF user community at large. The SIRTF images and spectra will be supplemented by a comprehensive multi-wavelength library of ancillary and complementary observations, including radio continuum, HI, CO, submillimeter, BVRIJHK, H-alpha, Paschen-alpha, ultraviolet, and X-ray data. This paper describes the main astrophysical issues to be addressed by SINGS, the galaxy sample and the observing strategy, and the SIRTF and other ancillary data products., 26 pages, 9 figures, PASP, in press

Published
2003
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2. Design for the First Narrowband Filter for the Dark Energy Camera: Optimizing the LAGER Survey for z ∼ 7 Galaxies.

Author

Zhen-Ya Zheng, James E. Rhoads, Jun-Xian Wang, Sangeeta Malhotra, Alistair Walker, Thomas Mooney, Chunyan Jiang, Weida Hu, Pascale Hibon, Linhua Jiang, Leopoldo Infante, L. Felipe Barrientos, Gaspar Galaz, Francisco Valdes, William Wester, Huan Yang, Alicia Coughlin, Santosh Harish, Wenyong Kang, and Ali Ahmad Khostovan

Subjects
CLINICAL pathology, GALAXIES, QUANTUM efficiency, FILTERS & filtration, ON-site evaluation
Abstract

We present the design for the first narrowband filter, NB964, for the Dark Energy Camera (DECam), which is operated on the 4-m Blanco Telescope at the Cerro Tololo Inter-American Observatory. The NB964 filter profile is essentially defined by maximizing the power of searching for Lyman-alpha emitting galaxies (LAEs) in the epoch of reionization, with the consideration of the night sky background in the near-infrared and the DECam quantum efficiency. The NB964 filter was manufactured by Materion in 2015. It has a central wavelength of 964.2 nm and a full width at half maximum (FWHM) of 9.2 nm. An NB964 survey named Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) has been ongoing since December 2015. Here, we report results of lab tests, on-site tests, and observations with the NB964 filter. The excellent performances of this filter ensure that the LAGER project is able to detect LAEs at z ∼ 7 with a high efficiency. [ABSTRACT FROM AUTHOR]

Published
2019
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