Results 1 to 10 of about 91,007 (306)
Disk or Companion: Characterizing Excess Infrared Flux in Seven White Dwarf Systems with Near-infrared Spectroscopy [PDF]
The Astronomical Journal, 2023 Excess infrared flux from white dwarf stars is likely to arise from a dusty debris disk or a cool companion. In this work, we present near-infrared spectroscopic observations with Keck/MOSFIRE, Gemini/GNIRS, and Gemini/Flamingos-2 of seven white dwarfs ...
Dylan Owens +9 more
doaj +3 more sources
White Dwarfs with Infrared Excess from LAMOST Data Release 5 [PDF]
The Astrophysical Journal, 2023 Infrared (IR) excess is an important probe for substellar companions and/or debris disks around white dwarfs (WDs). Such systems are still rare, so an in-depth understanding of their formation and long-term evolution has yet to be developed.
Lin Wang +7 more
doaj +3 more sources
Optical polarimetry of infrared excess stars [PDF]
Astronomy & Astrophysics, 2006 We present UBRVI polarimetry measurements for a group of 38 IRAS infrared excess stars and complement these observations with V -band data taken from the literature for 87 additional objects. After correcting the observed values by the interstellar contribution, we find that 48% of the analyzed sample has polarization excess.
C. Chavero +3 more
openaire +4 more sources
THE MYStIX INFRARED-EXCESS SOURCE CATALOG [PDF]
The Astrophysical Journal Supplement Series, 2013 The MYStIX project (Massive Young Star-Forming Complex Study in Infrared and X-rays) provides a comparative study of 20 Galactic massive star-forming complexes (d = 0.4 to 3.6 kpc). Probable stellar members in each target complex are identified using X-ray and/or infrared data via two pathways: (1) X-ray detections of young/massive stars with coronal ...
Povich, MS +8 more
core +7 more sources
Can decaying particle explain cosmic infrared background excess? [PDF]
Physics Letters B, 2017 Recently the CIBER experiment measured the diffuse cosmic infrared background (CIB) flux and claimed an excess compared with integrated emission from galaxies. We show that the CIB spectrum can be fitted by the additional photons produced by the decay of
Kazunori Kohri +2 more
doaj +2 more sources
A COMPREHENSIVE CENSUS OF NEARBY INFRARED EXCESS STARS [PDF]
Astrophysical Journal, Supplement Series, 2016 ABSTRACT The conclusion of the Wide-Field Infrared Survey Explorer (WISE) mission presents an opportune time to summarize the history of using excess emission in the infrared as a tracer of circumstellar material and exploit all available data for future missions such as the James Webb Space Telescope.
Inseok Song, Tara Cotten
exaly +3 more sources
White Dwarfs with Infrared Excess in the HET Dark Energy Experiment [PDF]
The Astrophysical JournalWhite dwarfs with infrared excess emission provide a window into the late stages of stellar evolution and the dynamics of circumstellar environments.
Rudy A. Morales +7 more
doaj +4 more sources
Near-infrared proper motions and spectroscopy of infrared excess sources at the Galactic center [PDF]
Astronomy & Astrophysics, 2013 20 pages, 18 figures, 4 tables plus appendix with 16 figures and 3 tables accepted by A& ...
A. Eckart +15 more
openaire +4 more sources
Characterization of gasoline/ethanol blends by infrared and excess infrared spectroscopy [PDF]
Fuel, 2015 Abstract Fuels for automotive propulsion are frequently blends of conventional gasoline and ethanol. However, the effects of adding an alcohol to a petrochemical fuel are yet to be fully understood. We report Fourier-transform infrared spectroscopy (FTIR) of ethanol/gasoline mixtures with systematically varied composition. Frequency shifts and excess
David Mcgloin +2 more
exaly +3 more sources
Prominent Mid-infrared Excess of the Dwarf Planet (136472) Makemake Discovered by JWST/MIRI Indicates Ongoing Activity [PDF]
The Astrophysical Journal LettersWe report on the discovery of a very prominent mid-infrared (18–25 μ m) excess associated with the trans-Neptunian dwarf planet (136472) Makemake. The excess, detected by the Mid-Infrared Instrument of the James Webb Space Telescope, along with previous ...
Csaba Kiss +20 more
doaj +2 more sources