Results 21 to 30 of about 2,644 (224)

Constraining the AGN Luminosity Function from JWST with the X-Ray Background

The Astrophysical Journal Letters, 2023
We predict the X-ray background (XRB) expected from the population of quasars detected by the James Webb Space Telescope spectroscopic surveys over the redshift range z ∼ 4–7.
Hamsa Padmanabhan, Abraham Loeb
doaj   +1 more source

Photometric Redshifts With Machine Learning, Lights and Shadows on a Complex Data Science Use Case

Frontiers in Astronomy and Space Sciences, 2021
The importance of the current role of data-driven science is constantly increasing within Astrophysics, due to the huge amount of multi-wavelength data collected every day, characterized by complex and high-volume information requiring efficient and, as ...
Massimo Brescia, Stefano Cavuoti, Stefano Cavuoti, Oleksandra Razim, Valeria Amaro, Giuseppe Riccio, Giuseppe Longo   +6 more
doaj   +1 more source

Astrophysical Distance Scale. VII. A Self-consistent, Multiwavelength Calibration of the Slopes and Relative Zero Points for the Run of Luminosity with the Color of Stars Defining the Tip of the Red Giant Branch

The Astronomical Journal, 2023
Given the recent successful launch of the James Webb Space Telescope, determining robust calibrations of the slopes and absolute magnitudes of the near- to mid-infrared tip of the red-giant branch (TRGB) will be essential to measuring precise ...
Barry F. Madore, Wendy L. Freedman, Kayla Owens   +2 more
doaj   +1 more source

Imaging and Spectroscopy with the James Webb Space Telescope [PDF]

Proceedings of the International Astronomical Union, 2007
AbstractThe James Webb Space Telescope (JWST) is a large, infrared-optimized space telescope scheduled for launch in 2013. JWST will find the first stars and galaxies that formed in the early universe, connecting the Big Bang to our own Milky Way galaxy.
openaire   +2 more sources

The James Webb Space Telescope [PDF]

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
Dr. Clampin is the James Webb Space Telescope (JWST) Observatory Project Scientist at GSFC. Dr. Clampin served earlier as an Instrument Scientist for WFPC2, followed by STIS, and then as the Advanced Camera for Surveys Group manager, Co-Investigator and Detector Scientist. Article not available.
openaire   +1 more source

Cometary Science with the James Webb Space Telescope [PDF]

Publications of the Astronomical Society of the Pacific, 2016
Accepted for publication in Publications of the Astronomical Society of the Pacific.
Kelley, Michael S. P., Woodward, Charles E., Bodewits, Dennis, Farnham, Tony L., Gudipati, Murthy S., Harker, David E., Hines, Dean C., Knight, Matthew M., Kolokolova, Ludmilla, Li, Aigen, de Pater, Imke, Protopapa, Silvia, Russell, Ray W., Sitko, Michael L., Wooden, Diane H.   +14 more
openaire   +2 more sources

Model‐Based Systems Engineering in Space Applications: A Comprehensive Literature Review

Systems Engineering, EarlyView.
ABSTRACT The growing complexity of space engineering is driving the demand to embrace the adoption of Model‐Based Systems Engineering (MBSE). Although the MBSE is well‐practiced in the space industry, the level of effort and need required to obtain the benefits of MBSE vastly differ across enterprises; this disparity presents a significant challenge to
Rehobot Bekele Buruso, Sara Himmiche, Taiwo Tejumola, Yeshirun Alemayehu, Bertrand Rose   +4 more
wiley   +1 more source

Unveiling the Cosmic Chemistry: Revisiting the Mass–Metallicity Relation with JWST/NIRSpec at 4 < z < 10

The Astrophysical Journal
We present star formation rates (SFRs), the mass–metallicity relation (MZR), and the SFR-dependent MZR across redshifts 4–10 using 81 star-forming galaxies observed by the JWST NIRSpec employing both low-resolution PRISM and medium-resolution gratings ...
Arnab Sarkar, Priyanka Chakraborty, Mark Vogelsberger, Michael McDonald, Paul Torrey, Alex M. Garcia, Gourav Khullar, Gary J. Ferland, William Forman, Scott Wolk, Benjamin Schneider, Mark Bautz, Eric Miller, Catherine Grant, John ZuHone   +14 more
doaj   +1 more source

JWST Low-resolution MIRI Spectral Observations of SN 2021aefx: High-density Burning in a Type Ia Supernova

The Astrophysical Journal Letters, 2023
We present a JWST/MIRI low-resolution mid-infrared (MIR) spectroscopic observation of the normal Type Ia supernova (SN Ia) SN 2021aefx at +323 days past rest-frame B -band maximum light.
J. M. DerKacy, C. Ashall, P. Hoeflich, E. Baron, B. J. Shappee, D. Baade, J. Andrews, K. A. Bostroem, P. J. Brown, C. R. Burns, A. Burrow, A. Cikota, T. de Jaeger, A. Do, Y. Dong, I. Dominguez, L. Galbany, E. Y. Hsiao, E. Karamehmetoglu, K. Krisciunas, S. Kumar, J. Lu, T. B. Mera Evans, J. R. Maund, P. Mazzali, K. Medler, N. Morrell, F. Patat, M. M. Phillips, M. Shahbandeh, S. Stangl, C. P. Stevens, M. D. Stritzinger, N. B. Suntzeff, C. M. Telesco, M. A. Tucker, S. Valenti, L. Wang, Y. Yang, S. W. Jha, L. A. Kwok   +40 more
doaj   +1 more source

The role of composition in the spectral evolution of carbonaceous asteroids as informed by Bennu sample return

Meteoritics &Planetary Science, EarlyView.
Abstract Near‐Earth rubble‐pile asteroids Bennu and Ryugu are part of the carbonaceous taxonomic complex (C‐complex), and samples returned from both bodies resemble the most aqueously altered carbonaceous chondrites. However, telescopic and spacecraft visible–near infrared (VIS–NIR) reflectance spectra of Ryugu exhibit a red (positive) spectral slope ...
Ralph E. Milliken, Takahiro Hiroi, Victoria E. Hamilton, Cody D. Schultz, Ed A. Cloutis, Hannah H. Kaplan, Melissa K. Kontogiannis, Nathalia Vega‐Santiago, Dani N. DellaGiustina, Harold C. Connolly Jr., Dante S. Lauretta   +10 more
wiley   +1 more source