Results 41 to 50 of about 590 (185)

The imprint of AGN-driven outflows on the Circumgalactic Medium: The case of Lyα nebulae around high-z quasars

Astronomy & Astrophysics
Some cosmological hydrodynamical simulations predict that outflows driven by active galactic nuclei (AGN) play a key role in powering the Lyα nebulae observed around high-redshift quasars.
Rueda-Vargas Silvia C., Mainieri Vincenzo, Tozzi Giulia, Kakkad Darshan, Arrigoni-Battaia Fabrizio, Costa Tiago, Farina Emanuele Paolo, Harrison Chris M.   +7 more
doaj   +1 more source

Unraveling the Relationship Between Nr4a2 and Fezf1 Expression in the Developing Feline Telencephalon Within the Genoarchitectonic Context of Claustral and Amygdalar Development

Journal of Comparative Neurology, Volume 534, Issue 11, November 2026.
To define the emergence of the claustral complex in relation to the expression patterns of Nr4a2 and Fezf1 in the domestic cat, a species with more protracted prenatal development than the mouse, we performed a genoarchitectonic analysis. Nr4a2 marked differentiating claustral neurons within the LPall mantle, whereas Fezf1 was broadly expressed in the ...
Nikistratos Siskos, Andreas‐Rafail Vasileiou, Evangelia Archontoulaki, Alexandra Tsakalidou‐Rafailidou, Charalampos Ververidis, George Skavdis, Maria E. Grigoriou   +6 more
wiley   +1 more source

Catalog of Planetary Nebulae Detected by GALEX and Corollary Optical Surveys

The Astrophysical Journal Supplement Series, 2023
Planetary nebulae (PNs) consist of an ionized envelope surrounding a hot central star (CSPN) that emits mostly at ultraviolet (UV) wavelengths. UV observations, therefore, provide important information on both the CSPN and the nebula. We have matched the
M. A. Gómez-Muñoz, L. Bianchi, A. Manchado   +2 more
doaj   +1 more source

Sulfidation Reaction Mechanisms of Olivine and Diopside at Mercury's Reducing Conditions

Journal of Geophysical Research: Planets, Volume 131, Issue 11, November 2026.
Abstract The surface of Mercury contains elevated amounts of sulfur of up to 4 wt.%. Volcanic degassing of S from the interior of the planet could have initiated sulfidation reactions between the degassed S and surface materials in the planet's past, leading to the observed surface S enrichment.
Rody C. Erftemeijer, Thomas Müller, Christian J. Renggli   +2 more
wiley   +1 more source

PyEMILI: A New Generation Computer-aided Spectral Line Identifier

The Astrophysical Journal Supplement Series
Deep high-dispersion spectroscopy of Galactic photoionized gaseous nebulae, mainly planetary nebulae and H ii regions, has revealed numerous emission lines.
Zhijun Tu, Xuan Fang, Robert Williams, Jifeng Liu   +3 more
doaj   +1 more source

S II emission lines in Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1997
Emission lines arising from transitions in S II have been detected in a wide variety of astronomical sources, including planetary nebulae (Hyung, Keyes & Aller 1995). These transitions are used to derive information on emitting plasmas parameters (Te, Ne) through diagnostic line ratios, although to calculate these quantities reliably, accurate ...
F. C. McKenna, F. P. Keenan, L. H. Aller, S. Hyung, K. L. Bell, C. A. Ramsbottom   +5 more
openaire   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, Volume 43, Issue 7, Page 4475-4514, October 2026.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Using Polarization to Uncover the Lyα Emission Mechanism in Lyα Nebulae

The Astrophysical Journal
“Ly α nebulae” are immense (∼100 kpc) glowing gas clouds located in the distant universe, and the origin of their extended Ly α emission remains a mystery.
Eunchong Kim, Yujin Yang, Sung-Joon Park, Ann Zabludoff, Paul Smith, Myung Gyoon Lee, Woong-Seob Jeong, Buell Jannuzi, Narae Hwang, Byeong-Gon Park   +9 more
doaj   +1 more source

Europa's Neutral Sodium Exosphere Is Quasi‐Stable Over Decades

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Europa's sodium cloud is thought to be modified by its orbital longitude and by its plasma environment, which modulates with Jovian magnetic geometry. To explore and quantify sodium cloud variability, seven sets of Keck I/HIRES measurements are compared providing comprehensive coverage of orbital and magnetic geometry.
Emma L. Lovett, Carl A. Schmidt, Zachariah Milby, Sean P. Ellis, Jamey R. Szalay   +4 more
wiley   +1 more source

The JWST-NIRCam View of Sagittarius C. II. Evidence for Magnetically Dominated H ii Regions in the Central Molecular Zone

The Astrophysical Journal
We present JWST-NIRCam narrowband, 4.05 μ m Br α images of the Sgr C H ii region, located in the central molecular zone (CMZ) of the Galaxy. Unlike any H ii region in the solar vicinity, the Sgr C plasma is dominated by filamentary structure in both Br α
John Bally, Samuel Crowe, Rubén Fedriani, Adam Ginsburg, Rainer Schödel, Morten Andersen, Jonathan C. Tan, Zhi-Yun Li, Francisco Nogueras-Lara, Yu Cheng, Chi-Yan Law, Q. Daniel Wang, Yichen Zhang, Suinan Zhang   +13 more
doaj   +1 more source