Results 51 to 60 of about 6,449 (205)

A review on natural background radiation

Advanced Biomedical Research, 2013
The world is naturally radioactive and approximately 82% of human-absorbed radiation doses, which are out of control, arise from natural sources such as cosmic, terrestrial, and exposure from inhalation or intake radiation sources.
Daryoush Shahbazi-Gahrouei, Mehrdad Gholami, Samaneh Setayandeh   +2 more
doaj   +1 more source

Bolide Light Curve Systematics from 75 Recovered Meteorites

Meteoritics &Planetary Science, EarlyView.
Abstract How does the energy deposition profile (light curve), deceleration, and penetration depth in Earth's atmosphere depend on asteroid composition and meteorite type? Here, we present the light curve and velocity profile of 75 bolides from camera‐documented meteorite falls.
Peter Jenniskens, Stuart Pilorz, Darrel Robertson, Eric C. Stern   +3 more
wiley   +1 more source

Planck Dust Polarization Power Spectra Are Consistent with Strongly Supersonic Turbulence

The Astrophysical Journal
The polarization of the cosmic microwave background is rich in information but obscured by foreground emission from the Milky Way’s interstellar medium (ISM). To uncover relationships between the underlying turbulent ISM and the foreground power spectra,
Kye A. Stalpes, David C. Collins, Kevin M. Huffenberger   +2 more
doaj   +1 more source

The first discovery of a shocked, metasomatised CV3 chondrule‐fragment in a (Al,Cu)‐bearing micrometeorite

Meteoritics &Planetary Science, EarlyView.
Abstract We report the discovery of the second (Al,Cu)‐alloy–bearing micrometeorite, FB‐A2, recovered from Mount Gariglione (southern Italy), representing the sixth such occurrence worldwide. Although chondritic in nature, FB‐A2 differs markedly from previously described microspherules.
Giovanna Agrosì, Paola Manzari, Daniela Mele, Johan Villeneuve, Tiziano Catelani, Mattew J. Genge, Luca Bindi   +6 more
wiley   +1 more source

Does the Correlation between 2MRS Galaxies and the CMB Indicate an Unmodeled CMB Foreground?

The Astrophysical Journal
We revisit the claimed detection of a new cosmic microwave background (CMB) foreground based on the correlation between low-redshift Two Micron All Sky Survey Redshift Survey (2MRS) galaxies and CMB temperature maps from the Planck and Wilkinson ...
Graeme E. Addison
doaj   +1 more source

Characterization of coesite‐bearing impact melt glass from the Hapcheon crater, Korea: Trimodal phase architecture, shock metamorphism, and implications for 40Ar/39Ar geochronology

Meteoritics &Planetary Science, EarlyView.
Abstract We present the first micrometer‐scale, phase‐resolved compositional characterization of impact melt glass from the Hapcheon crater (~1.4 km apparent diameter), the first confirmed impact structure on the Korean Peninsula, integrating EPMA‐WDS (5 μm spot), confocal Raman spectroscopy (<1 μm spot), XRD, and 40Ar/39Ar step‐heating geochronology ...
Jin‐Young Lee, Jeongmin Kim, Sei‐Sun Hong   +2 more
wiley   +1 more source

Revisiting the A L Lensing Anomaly in Planck 2018 Temperature Data

The Astrophysical Journal
We revisit the lensing anomaly in the Planck 2018 temperature (TT) data and examine its robustness to frequency selection and additional sky masking. Our main findings are as follows.
Graeme E. Addison, Charles L. Bennett, Mark Halpern, Gary Hinshaw, Janet L. Weiland   +4 more
doaj   +1 more source

The search for the ultimate exercise countermeasure to preserve crew health and ensure mission success in long‐duration spaceflight

Experimental Physiology, EarlyView.
Abstract The current understanding of crew health maintenance is founded upon decades of physiological research conducted in terrestrial spaceflight analogues and in low Earth orbit, particularly on the International Space Station. However, as we progress towards the Lunar Gateway and interplanetary missions, it is imperative that the tools employed to
Rodrigo Fernandez‐Gonzalo, Stefan Schneider, Martina Heer, Anna‐Maria Liphardt   +3 more
wiley   +1 more source

Using LHASSO-observed Gamma-Ray Bursts to Study the Extragalactic Background Light

The Astrophysical Journal
The extragalactic background light (EBL), a diffuse radiation field produced by all galaxies throughout cosmic history, plays a crucial role in the propagation of high-energy gamma-rays through photon–photon interactions.
Longhua Qin, Jiancheng Wang, Chuyuan Yang, Quangui Gao, Huaizhen Li, Ju Ma, Weiwei Na, Ao Wang, Xu Zhang, Baoyu Ma, Tingfeng Yi, Zunli Yuan, Chunxia Gu   +12 more
doaj   +1 more source

Niebla: An open-source code for modeling the extragalactic background light

Astronomy & Astrophysics
Context. The flux of extragalactic gamma rays is attenuated through interactions with optical and infrared photons of the extragalactic background light (EBL).
Porras-Bedmar Sara, Meyer Manuel
doaj   +1 more source