5 papers
Discovery of water vapor around IRC+10216 as evidence for comets orbiting another star
Gary J. Melnick, David A. Neufeld, K. E. Saavik Ford +2
Since 1995, astronomers have discovered planets with masses comparable to that of Jupiter (318 times Earth's mass) in orbit around approximately 60 stars. Although unseen directly,…
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…
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…
ISOCAM Observations of NGC 6946: Mid-IR Structure
S. Malhotra, G. Helou, D. van Buren +12
The nearby spiral galaxy NGC 6946 was observed with ISO-CAM in the mid-infrared, achieving 7 arcsec resolution and sub-MJy/steradian sensitivity. Images taken with CAM filters LW2…