Results 41 to 50 of about 91,007 (306)
Gaia white dwarfs with infrared excess
Astronomy & AstrophysicsContext. The presence of infrared (IR) excess flux observed in white dwarfs is related to the existence of debris disks or substellar companions. These systems provide important clues in studies of extrasolar planetary material and binary evolution ...
Murillo-Ojeda R. +3 more
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Mid-infrared supermirrors with finesse exceeding 400 000
Nature Communications, 2023 For trace gas sensing and precision spectroscopy, optical cavities incorporating low-loss mirrors are indispensable for path length and optical intensity enhancement.
Gar-Wing Truong +11 more
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Far-infrared Excesses in Classical Be Stars [PDF]
International Astronomical Union Colloquium, 2000 AbstractA sample of Be stars with large far-infrared excesses detected by IRAS is selected and their high-resolution IRAS images are examined. The far-infrared emission from most of them is marginally extended and is associated with the optical sources.
A.S. Miroshnichenko, K.S. Bjorkman
openaire +1 more source
Gamma-ray constraints on the infrared background excess [PDF]
, 2006 Motivated by the idea that the recently detected near-infrared (1.2 4 μm) excess over the contribution of known galaxies is due to redshifted light from the first cosmic stars [MNRAS 339 (2003) 973], we have used the effect caused by photon photon ...
Ferrara, A. +3 more
core +1 more source
Excess noise in long-wavelength infrared InAs/GaSb type-II superlattice pin-photodiodes [PDF]
, 2022 4 S.We present investigations of the noise behavior of InAs/GaSb superlattice infrared pin-photodiodes for the longwavelength infrared regime at 8-12 µm. In diodes with an increased dark current compared to the generation-recombination limited bulk value,
Rehm, Robert +2 more
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Anomalous excess noise behavior in thick Al0.85Ga0.15As0.56Sb0.44 avalanche photodiodes
Scientific Reports, 2023 Al0.85Ga0.15As0.56Sb0.44 has recently attracted significant research interest as a material for 1550 nm low-noise short-wave infrared (SWIR) avalanche photodiodes (APDs) due to the very wide ratio between its electron and hole ionization coefficients ...
Harry I. J. Lewis +10 more
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Efficient Selection and Classification of Infrared Excess Emission Stars Based on AKARI and 2MASS Data [PDF]
, 2015 The selection of young stellar objects (YSOs) based on excess emission in the infrared is easily contaminated by post-main-sequence stars and various types of emission line stars with similar properties.
Jin-Zeng Li +3 more
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Infrared and Radio Excesses of Late-Type Stars [PDF]
Symposium - International Astronomical Union, 1987 The IRAS catalogues have been searched for cool (G,K,M) giant and supergiant stars to investigate the occurrence of circumstellar (C/S)silicate dust, revealed by its emission features at 9.7 and 18μm. Low Resolution Spectrograph (LRS) spectra covering the 7-23μm range were used, plus the 60 and 100μm photometric points.
openaire +1 more source
A sample of 554 white dwarfs showing infrared excess from [PDF]
Context. White dwarfs (WDs) are generally intrinsically faint in the infrared (IR). Excess emission in the infrared results from low-mass companions or dusty material, potentially linked to the on-going accretion of planetary material. Aims.
Cristina Madurga Favieres +3 more
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Mid-infrared interference coatings with excess optical loss below 10 ppm [PDF]
, 2021 Low excess optical loss, combined absorption and scatter loss, is a key performance metric for any high-reflectance coating technology and is currently one of the main limiting factors for the application of optical resonators in the mid-infrared ...
Mayer, A. S. +15 more
core +1 more source