7 papers
The Large Area Lyman Alpha Survey
James E. Rhoads, Sangeeta Malhotra, Arjun Dey +3
The Lyman- line is expected to be strong in the presence of active star formation and the absence of dust, making it a good tool for finding chemically primitive galaxies in the…
Far Infrared Spectroscopy of star-forming galaxies: Expectations for the Herschel Space Observatory
Sangeeta Malhotra
ISO has enabled far-infrared spectroscopy of a variety of galaxies. Using the [CII] (158 micron) and [OI](63 micron) lines, we can characterize the physical conditions in the star-…
Evidence for the Heating of Atomic Interstellar Gas by PAHs
George Helou, Sangeeta Malhotra, David J. Hollenbach +2
We report a strong correlation between the [CII] 158 micron cooling line and the mid-infrared flux in the 5-10 micron range in a wide variety of star-forming galaxies. The mid-infr…
ISO measurements of [CII] line variations in galaxies
S. Malhotra, G. Helou, G. Stacey +11
We report measurements of the [CII] fine structure line at 157.714 micron in 30 normal star-forming galaxies with the Long Wavelength Spectrometer (LWS) on the Infrared Space Obser…
An ISOPHOT of the disk of galaxy NGC 6946: 60 micron infrared and radio continuum correlation
N. Y. Lu, G. Helou, R. Tuffs +4
We use the ISOPHOT 60 micron image of Tuffs et al. (1996) to study the 60 micron light distribution and its correlation with radio continuum within the disk of spiral galaxy NGC694…
The Mid-Infrared Color of NGC 6946
G. Helou, S. Malhotra, C. A. Beichman +10
We analyze the new mid-infrared maps of NGC 6946 for variations in the color ratio of the 7-to-15 micron emission. Our preliminary findings are that this mid-infrared color is rema…