Results 101 to 110 of about 58,632 (214)

HEAD IN THE STARS, FEET ON THE GROUND: Scale and Astronomy Initiatives in Southern Africa

Cultural Anthropology, Volume 40, Issue 4, Page 571-596, November 2025.
ABSTRACT This article explores the evolution of radio astronomy in South Africa and Madagascar, focusing on how “scale” functions as both a way of understanding the world and marking differences in existence. In outer space research, the ground is crucial but often overlooked.
HANNA NIEBER, DAVIDE CHINIGÒ
wiley   +1 more source

Dwarf Galaxies with Radio-excess Active Galactic Nuclei in the Very Large Array Sky Survey

The Astrophysical Journal
We present a systematic search for radio active galactic nuclei (AGNs) in dwarf galaxies using recent observations taken by the Very Large Array Sky Survey (VLASS).
John-Michael Eberhard, Amy E. Reines, Hansung B. Gim, Jeremy Darling, Jenny E. Greene   +4 more
doaj   +1 more source

Dwarf Galaxies in Focus: A Survey of Observational and Theoretical Studies

Galaxies
This paper presents provides a comprehensive survey of dwarf galaxies, which represent the most numerous and diverse systems in the Universe. We discuss their definitions and morphological classifications, emphasizing the unique properties that ...
Komiljon Tillaboev, Ikram Tadjibaev, Kamolidin Mamadaliyev, Dildor Otajonova, Malokhat Atajonova, Bagzodbek Abdullayev   +5 more
doaj   +1 more source

Tools for Learning—Promoting Reflection for Student Teachers' Development of PCK

Journal of Research in Science Teaching, Volume 62, Issue 8, Page 1902-1922, October 2025.
ABSTRACT This paper investigates how the coherent integration of three different tools for reflection during a science methods course can contribute to student teachers' planning and enactment of science teaching, that is, their development of pedagogical content knowledge (PCK).
Pernilla Nilsson, Anne‐Marie Cederqvist   +1 more
wiley   +1 more source

A Stellar Mass Threshold for Quenching of Field Galaxies

, 2012
We demonstrate that dwarf galaxies (10^7 < M_stellar < 10^9 Msun) with no active star formation are extremely rare (
Aihara, Balogh, Behroozi, Bell, Blanton, Blanton, Blanton, Blanton, Blanton, Blanton, Brown, Bryan, Gabor, Geha, Giovanelli, Grcevich, J. L. Tinker, Karachentseva, Kewley, Lisker, Ludlow, M. Geha, M. R. Blanton, Peng, Peng, R. Yan, Salim, Tinker, Walsh, Wang, Weisz, Willick, Woo, Wuyts, Yan, Yan, Yang, Zehavi   +37 more
core   +1 more source

H I-detected Dwarf Galaxies in the FASHI Survey: Insights from Single- and Double-peaked Emission-line Samples

The Astrophysical Journal Supplement Series
We present a sample of low H i mass ( M _H I  
Cheng Cheng, Jia-Sheng Huang, Wei Du, Hong-Xin Zhang, Chuan-Peng Zhang, Ming Zhu, Gustavo Orellana   +6 more
doaj   +1 more source

APOGEE chemical abundances of stars in the Milky Way satellites Fornax, Sextans, Draco, and Carina

Astronomy & Astrophysics
During its evolution, the Milky Way (MW) incorporated numerous dwarf galaxies, particularly low-mass systems. The surviving dwarf galaxies orbiting the MW serve as exceptional laboratories for studying the unique properties of these systems.
Xu Cheng, Qiao Yi, Tang Baitian, Fernández-Trincado José G., Yan Zhiqiang, Huang Ruoyun, Geisler Doug   +6 more
doaj   +1 more source

Statistical analysis of dwarf galaxies and their globular clusters in the Local Volume

, 2012
Morphological classification of dwarf galaxies into early and late type, though can account for some of their origin and characteristics but does not help to study their formation mechanism.
Babu, Chattopadhyay, Chattopadhyay, Da Costa, Grebel, Grebel, Haines, Hirashita, Johnson, Karachentsev, Karachentsev, Karachentseva, Lisker, Little, MacQueen, Margarita Sharina, Marin-Franch, Murtagh, Pradip Karmakar, Puzia, Tanuka Chattopadhyay, Tully, van den Bergh, Vilchez, White   +24 more
core   +1 more source

Dwarf SPHS/First-Galaxies Connection [PDF]

, 2003
6 pages, 3 figures. To appear in the proceedings of "The IGM/Galaxy Connection - The Distribution of Baryons at z=0", ed. M.
openaire   +2 more sources

Strong He i Emission Lines in High N/O Galaxies at z ∼ 6 Identified in JWST Spectra: High He/H Abundance Ratios or High Electron Densities?

The Astrophysical Journal
We present He i /H β flux and He/H abundance ratios in three James Webb Space Telescope galaxies with significant constraints on N/O abundance ratios, GS-NDG-9422, RXCJ2248-ID, and GLASS150008 at z ∼ 6 mostly with the spectroscopic coverage from He i λ ...
Hiroto Yanagisawa, Masami Ouchi, Kuria Watanabe, Akinori Matsumoto, Kimihiko Nakajima, Hidenobu Yajima, Kentaro Nagamine, Koh Takahashi, Minami Nakane, Nozomu Tominaga, Hiroya Umeda, Hajime Fukushima, Yuichi Harikane, Yuki Isobe, Yoshiaki Ono, Yi Xu, Yechi Zhang   +16 more
doaj   +1 more source