منابع مشابه
A peculiar class of debris disks from Herschel/DUNES⋆
Context. The existence of debris disks around old main sequence stars is usually explained by continuous replenishment of small dust grains through collisions from a reservoir of larger objects. Aims. We present photometric data of debris disks around HIP 103389 (HD 199260), HIP 107350 (HN Peg, HD 206860), and HIP 114948 (HD 219482), obtained in the context of our Herschel open time key program...
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The wavelength-dependence of the extinction of Type Ia SN 2014J in the nearby galaxy M82 has been measured using UV to near-IR photometry obtained with the Hubble Space Telescope, the Nordic Optical Telescope, and the Mount Abu Infrared Telescope. This is the first time that the reddening of a SN Ia is characterized over the full wavelength range of 0.2–2μm. A total-toselective extinction, RV ≥...
متن کاملThe peculiar nebula Simeis 57 I . Ionized Gas and Dust Extinction
We present high resolution radio continuum maps of the Galactic nebula Simeis 57 (= HS 191 = G 80.3+4.7) made at the Westerbork Synthesis Radio Telescope and the Dominion Radio Astrophysical Observatory at frequencies of 609, 1412 and 1420 MHz. At optical and at radio wavelengths, the nebula has a peculiar " S " shape, crossed by long, thin and straight filaments. The radio maps, combined with ...
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cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
High-resolution Infrared Imaging of Herschel 36 Se: a Showcase for the Influence of Massive Stars in Cluster Environments
We present high-resolution infrared imaging of the massive star-forming region around the O-star Herschel 36. Special emphasis is given to a compact infrared source at 0. 25 southeast of the star. The infrared source, hereafter Her 36 SE, is extended in the broad–band images, but features spatially unresolved Br γ line emission. The line-emission source coincides in position with the previous H...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1982
ISSN: 0004-637X,1538-4357
DOI: 10.1086/183919