Results 121 to 130 of about 32,530 (259)

Recent Results from Infrared Observations of White Dwarfs, their Companions, and the Dust that Surrounds Them [PDF]

open access: yes, 2007
Although "traditionally" observed at short wavelengths, white dwarfs have displayed many surprising features when probed in the infrared. We present an overview of recent results from ground- and space-based near- to mid-infrared observations of white ...
Brinkworth, C. S.   +2 more
core  

Modeling Spitzer 3.6 and 4.5 μm Eclipse Depths for the Inflated Hot Jupiter in the Evolved Binary System HD 202772

open access: yesThe Astronomical Journal
As an inflated hot Jupiter orbiting an early-type primary star in the evolved binary HD 202772 system, HD 202772 A b’s presence invites a study of how such a planet forms and evolves. As a prelude to potential atmospheric characterization with the latest
Arthur D. Adams   +11 more
doaj   +1 more source

Information of Structures in Galaxy Distribution

open access: yes, 2006
We introduce an information-theoretic measure, the Renyi information, to describe the galaxy distribution in space. We discuss properties of the information measure, and demonstrate its relationship with the probability distribution function and ...
Borgani S.   +4 more
core   +2 more sources

Star Formation at the Epoch of Reionization with CANUCS: The Ages of Stellar Populations in MACS1149-JD1

open access: yesThe Astrophysical Journal Letters
We present measurements of stellar populations properties of a z = 9.1 gravitationally lensed galaxy MACS1149-JD1 using deep James Webb Space Telescope NIRISS slitless spectroscopy as well as NIRISS and NIRCam imaging from the CAnadian NIRISS Unbiased ...
Maruša Bradač   +17 more
doaj   +1 more source

Precise Bolometric Luminosities and Effective Temperatures of 23 Late-T and Y Dwarfs Obtained with JWST

open access: yesThe Astrophysical Journal
We present infrared spectral energy distributions of 23 late-type T and Y dwarfs obtained with the James Webb Space Telescope. The spectral energy distributions consist of NIRSpec PRISM and MIRI low-resolution spectrometer spectra covering the ∼1–12 μ m ...
Samuel A. Beiler   +7 more
doaj   +1 more source

Sequencing Silicates in the Spitzer Infrared Spectrograph Debris Disk Catalog. I. Methodology for Unsupervised Clustering

open access: yesThe Astrophysical Journal Supplement Series
Debris disks, which consist of dust, planetesimals, planets, and gas, offer a unique window into the mineralogical composition of their parent bodies, especially during the critical phase of terrestrial planet formation spanning 10 yr to a few hundred ...
Cicero X. Lu   +12 more
doaj   +1 more source

The NASA/IPAC Infrared Science Archive (IRSA): The Demo [PDF]

open access: yes, 2005
This paper describes the services available at the NASA/IPAC Infrared Science Archive (IRSA). Currently there are nearly 250,000 data requests a month, taking advantage of IRSA's data repository which includes 660 million sources (60 catalogs), 10 ...
Alexov, Anastasia   +10 more
core  

A "Starless" Core that Isn't: Detection of a Source in the L1014 Dense Core with the Spitzer Space Telescope [PDF]

open access: yes, 2004
We present observations of L1014, a dense core in the Cygnus region previously thought to be starless, but data from the Spitzer Space Telescope show the presence of an embedded source. We propose a model for this source that includes a cold core, heated
Blake, Geoffrey A.   +4 more
core  

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