Results 91 to 100 of about 28,808 (222)

The Ejecta Nebula Around the Wolf–Rayet Star WR 71

The Astronomical Journal
We present deep H α and [O iii ] images of the ejecta-rich nebulosity associated with the suspected runaway and binary Wolf–Rayet (WR) star WR 71 (HD 143414). In H α emission, the nebula appears as a crescent shaped, broken ring of clumpy emission some ${
Robert A. Fesen, Manuel C. Peitsch, Martin R. Pugh, Bray Falls, Marcel Drechsler   +4 more
doaj   +1 more source

Characteristics of Natural Remanence Records in Fine‐Grained Particles Returned From Asteroid Ryugu

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Particles collected from the asteroid Ryugu by the Hayabusa2 spacecraft offer a unique opportunity to investigate the magnetic record of the primitive solar system, as any terrestrial magnetic contamination is minimal and can be accounted for.
Masahiko Sato, Yuki Kimura, Tadahiro Hatakeyama, Tomoki Nakamura, Satoshi Okuzumi, Sei‐ichiro Watanabe, Seiji Sugita, Satoshi Tanaka, Shogo Tachibana, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Yuichi Tsuda   +27 more
wiley   +1 more source

The Outflowing [O ii] Nebulae of Compact Starburst Galaxies at z ∼ 0.5

The Astrophysical Journal
High-velocity outflows are ubiquitous in compact, massive ( M _* ∼ 10 ^11 M _⊙ ), z ∼ 0.5 galaxies with extreme star formation surface densities (Σ _SFR ∼ 2000 M _⊙ yr ^−1 kpc ^−2 ).
Serena Perrotta, Alison L. Coil, David S. N. Rupke, Wenmeng Ning, Brendan Duong, Aleksandar M. Diamond-Stanic, Drummond B. Fielding, James E. Geach, Ryan C. Hickox, John Moustakas, Gregory H. Rudnick, Paul H. Sell, Cameren N. Swiggum, Christy A. Tremonti   +13 more
doaj   +1 more source

Floating zone growth of high‐purity MgO substrate single crystals

Acta Crystallographica Section B, Volume 82, Issue 1, Page 2-13, February 2026.
High‐purity MgO substrate crystals grown by the optical floating zone technique are demonstrated, which can serve as a foundation for the development of novel device concepts based on epitaxially grown thin films.MgO single crystals with diameters between 3.5 and 5 mm and lengths up to 40 mm were grown by the optical floating zone technique (OFZ ...
Christo Guguschev, Michael Schulze, Andrea Dittmar, Detlef Klimm, Kaspars Dadzis, Thomas Schroeder, Knut Peters, Aakash Pushp   +7 more
wiley   +1 more source

CO observations in rotating circumbinary post-AGB disks

Astronomy & Astrophysics
Context. There is a group of post-asymptotic giant branch (post-AGB) stars that are part of a binary system and that show a significant infrared excess.
Gallardo Cava I., Alcolea J., Van Winckel H., Bujarrabal V., Santander-García M., Gómez-Garrido M.   +5 more
doaj   +1 more source

Infrared Emission from Planetary Nebulae

The Astrophysical Journal, 1969
IR emission from planetary nebulae, W-R, Of and symbiotic stars, discussing dust hypothesis for IR ...
openaire   +1 more source

Evaluating Investment in Space Programs: A Case for Theoretical Pluralism

Financial Accountability &Management, Volume 42, Issue 1, Page 19-35, February 2026.
ABSTRACT A perennial question repeatedly asked since the early Mercury (USA) and Salyut (then Soviet Union) space programs has been variations on the theme of “how can the cost of space exploration be justified?” This question—which in broad terms constitutes the research question considered in this paper—continues to be directed toward space agencies ...
Basil P. Tucker, Hank C. Alewine
wiley   +1 more source

A survey for PAH emission in H II regions, planetary and proto-planetary nebulae [PDF]

The results of a systematic investigation of polycyclic aromatic hydrocarbon (PAH) emission in H II regions, planetary nebulae (PN), and proto-planetary nebulae (PNN), are reported. Data is obtained from the low resolution spectra (LRS) of IRAS.
Cox, P., Demuizon, M., Lequeux, J.
core   +1 more source

The emerging population of pulsar wind nebulae in hard X-rays

, 2009
The hard X-ray synchrotron emission from pulsar wind nebulae (PWNe) probes energetic particles, closely related to the pulsar injection power at the present time. INTEGRAL has disclosed the yet poorly known population of hard X-ray pulsar/PWN systems. We
D. Götz, F. Mattana, Jéro^me Rodriguez, M. Falanga, M. Renaud, Phillippe Ferrando, R. Terrier   +6 more
core   +1 more source

[Feiv] Emission in Ionized Nebulae [PDF]

The Astrophysical Journal, 2003
23 pages, 3 figures, accepted for publication in ApJ, a new table and several comments ...
openaire   +2 more sources