Results 81 to 90 of about 67,435 (221)

Period–Luminosity–Metallicity–Color Relations of Late-type Contact Binaries in the Big Data Era

The Astrophysical Journal
Binary stars ubiquitous throughout the Universe are important. Contact binaries (CBs) possessing period–luminosity (PL) relations could be adopted as distance tracers. The PL relations of CBs are influenced by metallicity abundance and color index, which
Lian-Yun Song, Zhi-Jia Tian
doaj   +1 more source

Infrared photometry of planetary nebulae.

The Astrophysical Journal, 1973
Photometric observations from 1.6 to 3.5 mu of 28 planetary nebulae are presented. Most of these emit 3.5- mu radiation in excess of that expected from thermal emission by ionized gas. When combined with the measurements of Willner, Becklin, and Visvanathan, the data show that the nebulae with relatively high densities are the more likely to emit ...
S. E. Persson, J. A. Frogel
openaire   +1 more source

Wide-field Infrared Survey Explorer Observations of Young Stellar Objects in the Western Circinus Molecular Cloud [PDF]

, 2011
The Wide-field Infrared Survey Explorer has uncovered a population of young stellar objects in the Western Circinus molecular cloud. Images show the YSOs to be clustered into two main groups that are coincident with dark filamentary structure in the ...
Bally, Bally, Cutri, Cutri, Dobashi, Harvey, Jarrett, Kirk, Mikami, Ray, Rebull, Reipurth, Reipurth, Reipurth, Wright   +14 more
core   +2 more sources

Online circular contrast perimetry: Tablet validation study against desktop test and standard automated perimetry

Optometry and Vision Science, Volume 103, Issue 4, April 2026.
ABSTRACT Purpose To assess correlation, agreement and diagnostic accuracy of a new tablet‐based 24‐degree, 52‐point online circular contrast perimetry application (OCCP), compared to computer‐based OCCP and standard automated perimetry (SAP). Methods Seventy‐five participants (26 controls, 49 glaucomatous) were tested via SAP using Humphrey field ...
Rahman Abdul, Abdul A. Khoder, Angela Gong, Lazar Busija, Simon E. Skalicky   +4 more
wiley   +1 more source

The Second and Third Data Releases from the UKIRT Hemisphere Survey

The Astronomical Journal
This paper describes the second and third data releases (DR2 and DR3, respectively) from the ongoing United Kingdom Infrared Telescope Hemisphere Survey (UHS).
Adam C. Schneider, Frederick J. Vrba, Justice Bruursema, Jeffrey A. Munn, Mike Irwin, Mike Read, Watson Varricatt, Tom Kerr, Klaus Hodapp, Simon Dye, Stephen J. Williams, Andrew T. Cenko, Trudy M. Tilleman, Marc A. Murison, Barry Rothberg, Scott Dahm, Bryan Dorland, Andy Lawrence, Kenneth C. Chambers   +18 more
doaj   +1 more source

On the Accuracy of Infrared Photometry [PDF]

Symposium - International Astronomical Union, 1985
Photometric errors due to scintillation are considered in detail. Given noise characteristics, the standard deviations, as deduced from observations, are computed for the quantities measured at successive steps of the photometric procedure. This allows us to understand better the errors computed on-line in observatories, and to understand better the ...
R. Papoular, B. Pégourié
openaire   +1 more source

Luminous Red Galaxies: Selection and classification by combining optical and infrared photometry

, 2015
We describe a new method of combining optical and infrared photometry to select Luminous Red Galaxies (LRGs) at redshifts $z > 0.6$. We explore this technique using a combination of optical photometry from CFHTLS and HST, infrared photometry from the ...
Licquia, Timothy C., Newman, Jeffrey A., Prakash, Abhishek, Rao, Sandhya M.   +3 more
core   +1 more source

SGAS 143845.1+145407: A Big, Cool Starburst at Redshift 0.816 [PDF]

, 2012
We present the discovery and a detailed multi-wavelength study of a strongly-lensed luminous infrared galaxy at z=0.816. Unlike most known lensed galaxies discovered at optical or near-infrared wavelengths this lensed source is red, r-Ks = 3.9 [AB ...
Abramson, Louis E., Bans, Alissa, Baxter, Eric J., Bayliss, Matthew B., Benford, Dominic J., Dahle, Hakon, Finkelstein, Keely D., Gladders, Michael D., Helsby, Jennifer E., Kelson, Daniel D., Koester, Benjamin P., Monson, Andrew J., Murphy, David, Persson, S. E., Rigby, Jane R., Sharon, Keren, Wuyts, Eva   +16 more
core   +3 more sources

Characterization of the Outer Uranian Rings in the Visual and Near‐IR Using Keck, JWST, and HST Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract We present observations of the Uranian outer ring system at near‐infrared and visible wavelengths. Observations with the Keck Telescope were taken in July‐August 2007 at 2.12 and 1.63 μm, when the ring plane was almost edge‐on (ring opening angle B=0.62 $B=0.62$–0.24° ${}^{\circ}$). These data showed, for the first time, the μ ring at infrared
Imke de Pater, Mark R. Showalter, Matt M. Hedman, Heidi B. Hammel, Mike Roman, Leigh N. Fletcher, Maryame El Moutamid, Damya Souami   +7 more
wiley   +1 more source

MEGA Mass Assembly with JWST: The MIRI EGS Galaxy and Active Galactic Nucleus Survey

The Astronomical Journal
We present the Mid-Infrared Instrument (MIRI) Extended Groth Strip (EGS) Galaxy and Active Galactic Nucleus (MEGA) survey, a four-band MIRI survey with 25 pointings in the EGS extragalactic field.
Bren E. Backhaus, Allison Kirkpatrick, Guang Yang, Gregory Troiani, Kurt Hamblin, Jeyhan S. Kartaltepe, Dale D. Kocevski, Anton M. Koekemoer, Erini Lambrides, Casey Papovich, Kaila Ronayne   +10 more
doaj   +1 more source