Results 121 to 130 of about 3,030,245 (218)

Improving H2RG Performance in SPHEREx Brassboard Model

The Astrophysical Journal Supplement Series
Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer is an upcoming NASA satellite mission to study the physics of inflation, the history of galaxy formation, and the abundance of biogenic ices in the Milky Way ...
Chi H. Nguyen, Phillip Korngut, C. Darren Dowell, James Bock, Jill Burnham, Samuel Condon, Walter Cook, Grigory Heaton, Howard Hui, Branislav Kecman, Hiromasa Miyasaka, Kenneth Manatt, Hien T. Nguyen, Stephen Padin, Marco Viero   +14 more
doaj   +1 more source

Asteroid Impact Hazard Warning from the Near-Earth Object Surveyor Mission

The Planetary Science Journal
NASA’s Near-Earth Object Surveyor mission, scheduled for launch in 2027 September, is designed to detect and characterize at least two-thirds of the potentially hazardous asteroids with diameters larger than 140 m in a nominal 5 yr mission. We describe a
Oliver Lay, Joe Masiero, Tommy Grav, Amy Mainzer, Frank Masci, Edward Wright   +5 more
doaj   +1 more source

Rapid measurement of polycyclic aromatic hydrocarbon contamination in soils by visible and near-infrared spectroscopy [PDF]

, 2013
Polycyclic aromatic hydrocarbons (PAHs) are widely distributed organic pollutants. At petroleum contaminated sites, PAHs are often the key risk drivers because of their carcinogenicity. Assessing the risk of PAH at contaminated sites by conventional soil
Okparanma, Reuben N.
core   +1 more source

Stellar Characterization and Chemical Abundances of Exoplanet-hosting M Dwarfs from APOGEE Spectra: Future JWST Targets

The Astrophysical Journal
Exoplanets hosting M dwarfs are the best targets to characterize Earth-like or super-Earth planetary atmospheres with the James Webb Space Telescope (JWST).
Edypo Melo, Diogo Souto, Katia Cunha, Verne V. Smith, Fábio Wanderley, Vinicius Grilo, Deusalete Camara, Kely Murta, Neda Hejazi, Ian J. M. Crossfield, Johanna Teske, Rafael Luque, Michael Zhang, Jacob Bean   +13 more
doaj   +1 more source

The K s -band Luminosity Function of the Rich Cluster VC04 in the Vela Supercluster

The Astrophysical Journal
To learn more about the properties of the Vela Supercluster (VSCL), located behind the Milky Way at cz ∼ 18,000 km s ^−1 , we determine the K _s -band luminosity function (LF) of VC04, the richest known galaxy cluster in the VSCL, and two other VSCL ...
N. Hatamkhani, R. C. Kraan-Korteweg, S. L. Blyth, R. E. Skelton   +3 more
doaj   +1 more source

A Spectroscopic Analysis of the Ionizing Photon Production Efficiency in JADES and CEERS: Implications for the Ionizing Photon Budget

The Astrophysical Journal
We have used a combined sample of JADES and CEERS objects in order to constrain ionizing photon production efficiency ( ξ _ion ) from JWST/NIRSpec and JWST/NIRCam data. We examine 163 objects at 1.06 
Anthony Pahl, Michael W. Topping, Alice Shapley, Ryan Sanders, Naveen A. Reddy, Leonardo Clarke, Emily Kehoe, Trinity Bento, Gabe Brammer   +8 more
doaj   +1 more source

Coma Physics of an Interstellar Object: JWST Spatial–Spectral Mapping of 3I/ATLAS

The Astrophysical Journal Letters
We report a survey of molecular emission from cometary volatiles using the James Webb Space Telescope (JWST) toward interstellar object 3I/ATLAS carried out on UT 2025 December 22 and 23 at a heliocentric distance ( r _H ) of 2.37–2.41 au.
Nathan X. Roth, Martin A. Cordiner, Stefanie N. Milam, Geronimo L. Villanueva, Steven B. Charnley, Nicolas Biver, Dominique Bockelée-Morvan, Dennis Bodewits, Steven J. Bromley, Jacques Crovisier, Maria N. Drozdovskaya, Sara Faggi, Davide Farnocchia, Kenji Furuya, Michael S. P. Kelley, Marco Micheli, John W. Noonan, Cyrielle Opitom, Megan E. Schwamb, Cristina A. Thomas   +19 more
doaj   +1 more source

Spectral Response of SPHEREx

The Astrophysical Journal Supplement Series
The Spectro Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer (SPHEREx) is conducting the first all-sky near-infrared spectral survey spanning 0.75–5.0  μ m with resolving power R  ≈ 35–130.
Howard Hui, James J. Bock, Samuel Condon, C. Darren Dowell, Woong-Seob Jeong, Young-soo Jo, Phil M. Korngut, Kenneth Manatt, Chi Nguyen, Hien Nguyen, Stephen Padin, Sung-Joon Park, Jeonghyun Pyo, Yujin Yang, Matthew L. N. Ashby, Yoonsoo P. Bach, Tzu-Ching Chang, Yun-Ting Cheng, Yi-Kuan Chiang, Asantha Cooray, Brendan P. Crill, Ari J. Cukierman, Olivier Doré, Andreas L. Faisst, Joseph L. Hora, Jae Hwan Kang, BoMee Lee, Carey M. Lisse, Daniel C. Masters, Roberta Paladini, Zafar Rustamkulov, Volker Tolls, Michael W. Werner, Michael Zemcov   +33 more
doaj   +1 more source

Pulling Back the Curtain on Shocks and Star Formation in NGC 1266 with Gemini-NIFS

The Astrophysical Journal
We present Gemini near-infrared integral field spectrograph K -band observations of the central 400 pc of NGC 1266, a nearby ( D ≈ 30 Mpc) post-starburst galaxy with a powerful multiphase outflow and a shocked interstellar medium.
Justin Atsushi Otter, Katherine Alatalo, Kate Rowlands, Richard M. McDermid, Timothy A. Davis, Christoph Federrath, K. Decker French, Timothy Heckman, Patrick Ogle, Darshan Kakkad, Yuanze Luo, Kristina Nyland, Akshat Tripathi, Pallavi Patil, Andreea Petric, Adam Smercina, Maya Skarbinski, Lauranne Lanz, Kristin Larson, Philip N. Appleton, Susanne Aalto, Gustav Olander, Elizaveta Sazonova, J. D. T. Smith   +23 more
doaj   +1 more source

Infrared Colors of Small Serendipitously Found Asteroids in the UKIRT Hemisphere Survey

The Astronomical Journal
The UKIRT Hemisphere Survey covers the northern sky in the infrared from 0° to 60° decl. Current data releases include both J and K bands, with H -band data forthcoming. Here, we present a novel pipeline to recover asteroids from this survey data.
Samantha G. Morrison, Ryder H. Strauss, David E. Trilling, Andy J. López-Oquendo, Justice Bruursema, Frederick J. Vrba   +5 more
doaj   +1 more source