Results 101 to 110 of about 113,123 (219)

Constraining the Hydration of Clay Minerals and Abundances of Amorphous Phases in Gale Crater, Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Both water and organic matter are required for the development and persistence of life. Phyllosilicates (clay minerals) have high surface areas that easily sorb water and organic matter. The Curiosity rover has investigated several hundred meters of stratigraphy in Gale crater, including where clays were detected from orbit.
Sean Czarnecki, Craig Hardgrove, Liz Rampe, Patrick Gasda   +3 more
wiley   +1 more source

MOSDEF-3D: Keck/OSIRIS Maps of the Ionized Interstellar Medium in z ∼ 2 Galaxies

The Astrophysical Journal
We present spatially resolved rest-frame optical emission line maps of four galaxies at z  ∼ 2 observed with the Keck/OH-Suppressing Infra-Red Imaging Spectrograph to study the physical conditions of the interstellar medium (ISM) at cosmic noon.
Natalie Lam, Alice E. Shapley, Ryan L. Sanders, Tuan Do, Tucker Jones, Alison Coil, Mariska Kriek, Bahram Mobasher, Naveen A. Reddy, Brian Siana, Leonardo Clarke   +10 more
doaj   +1 more source

GOES‐R Series X‐Ray Sensor (XRS): 2. On‐Orbit Measurements and Calibrations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract An X‐Ray Sensor (XRS) has been onboard each of the National Oceanic and Atmospheric Administration (NOAA) Geostationary Operational Environmental Satellites (GOES) since 1975. XRS measures full‐disk soft X‐ray irradiance in two wavelength bands, 0.05–0.4 nm and 0.1–0.8 nm.
Janet L. Machol, Stefan M. Codrescu, Courtney L. Peck, Elysia S. Lucas, James F. Mothersbaugh III, Thomas N. Woods, Ann Marie Mahon, James Negus, Donald L. Woodraska, Thomas D. Eden Jr., Francis G. Eparvier, Andrew R. Jones, Brooke Kotten, Laurel A. Rachmeler, Andrew C. Wilson, Brian T. Kress, Juan V. Rodriguez, Rodney A. Viereck   +17 more
wiley   +1 more source

A NOEMA pilot survey of [C II] line emission in luminous galaxies at z  ≈  6

Astronomy & Astrophysics
We present Northern Extended Millimeter Array (NOEMA) observations of four luminous galaxies at z ∼ 6, when the Universe was less than ∼1 Gyr old. These galaxies are detected in the [C II] 158 μm fine-structure line, and three also exhibit underlying ...
Martínez-Cuadra B., Herrera-Camus R., Förster Schreiber N., Tacconi L., Genzel R., Liu D., Harikane Y., Jolly J. B., Naab T., Neri R., Tozzi G., Übler H.   +11 more
doaj   +1 more source

Ryugu reference project: Recommendations from the measurement definition team

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 819-848, May 2026.
Abstract Sample return missions play a significant role in planetary science by providing pristine extraterrestrial materials. JAXA's Hayabusa2 and NASA's OSIRIS‐REx missions have returned samples from the C‐type asteroids Ryugu and Bennu, respectively. The chemical and mineralogical compositions of these samples closely resemble those of CI chondrites,
Tetsuya Yokoyama, Guillaume Avice, Henner Busemann, Nicolas Dauphas, Daniel P. Glavin, Ashley J. King, Thorsten Kleine, Katharina Lodders, Frederic Moynier, Maria Schönbächler, Yoshinori Takano, Kun Wang, Hikaru Yabuta, Yuma Enokido, Ryota Fukai, Shogo Tachibana, Tomohiro Usui   +16 more
wiley   +1 more source

Spectrophotometry of three emission-line galaxies.

The Astrophysical Journal, 1973
Spectrophotometric data concerning three blue emission-line galaxies were obtained from image-tube spectrograms secured with the 84-inch reflector of the Kitt Peak National Observatory. Analysis of these data indicated a level of excitation similar to that of low- or moderate-excitation galactic H II regions.
openaire   +1 more source

UNCOVERing the High-redshift AGN Population among Extreme UV Line Emitters

The Astrophysical Journal
JWST has revealed diverse new populations of high-redshift ( z  ∼ 4–11) active galactic nuclei (AGNs) and extreme star-forming galaxies that challenge current photoionization models.
Helena Treiber, Jenny E. Greene, John R. Weaver, Tim B. Miller, Lukas J. Furtak, David J. Setton, Bingjie Wang, Anna de Graaff, Rachel Bezanson, Gabriel Brammer, Sam E. Cutler, Pratika Dayal, Robert Feldmann, Seiji Fujimoto, Andy D. Goulding, Vasily Kokorev, Ivo Labbe, Joel Leja, Danilo Marchesini, Themiya Nanayakkara, Erica Nelson, Richard Pan, Sedona H. Price, Jared Siegel, Katherine A. Suess, Katherine E. Whitaker   +25 more
doaj   +1 more source

The Origin of [OII] Emission in Recently Quenched AGN Hosts

, 2010
We have employed emission-line diagnostics derived from DEIMOS and NIRSPEC spectroscopy to determine the origin of the [OII] emission line observed in six AGN hosts at z~0.9. These galaxies are a subsample of AGN hosts detected in the Cl1604 supercluster
Calzetti, Eastman, Gal, Gal, Gebhardt, Gilli, Ho, Hopkins, Kewley, Kocevski, Kocevski, Kocevski, Lemaux, Lemaux, Miller, Poggianti, Poggianti, Poggianti, Springel, Tremaine, Yan   +20 more
core   +1 more source

H i Properties of Field Galaxies at z ≈ 0.2–0.6: Insights into Declining Cosmic Star Formation

The Astrophysical Journal Letters
We report statistically significant detection of H i 21 cm emission from intermediate-redshift ( z  ≈ 0.2–0.6) galaxies. By leveraging multisightline galaxy survey data from the Cosmic Ultraviolet Baryon Survey and deep radio observations from the ...
David DePalma, Neeraj Gupta, Hsiao-Wen Chen, Robert A. Simcoe, Sergei Balashev, Erin Boettcher, Sebastiano Cantalupo, Mandy C. Chen, Françoise Combes, Claude-André Faucher-Giguère, Sean D. Johnson, Hans-Rainer Klöckner, Jens-Kristian Krogager, Jennifer I-Hsiu Li, Sebastián López, Pasquier Noterdaeme, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri Zahedy   +20 more
doaj   +1 more source

Hα emission line morphologies in Markarian starburst galaxies

Journal of Astrophysics and Astronomy, 2001
We present broad band R and narrow band H alpha emission line images of a sample of optically selected starburst galaxies from the Markarian lists. The emission line morphology is studied and global properties like luminosities, equivalent widths and star formation rates are derived.
Chitre, A, Joshi, UC
openaire   +2 more sources