Results 21 to 30 of about 390,122 (225)

The CO contents of dwarf irregular galaxies

The Astrophysical Journal, 1987
A search has been conducted for CO in 16 dwarf irregular galaxies selected to span a wide range of infrared luminosity and color. CO was detected in six dwarf galaxies spanning the entire range in optical color and IR luminosity. The dwarf galaxies extend by three orders of magnitude in luminosity the correlation between IR and CO luminosities found ...
TACCONI, LJ, Young, JS
openaire   +2 more sources

Secondary evolution of galaxies investigated by N-body simulations [PDF]

, 2008
In the ΛCDM cosmology, merging is one of the most important physical processes that drives the formation and evolution of galaxies. In the present work, we use N-body techniques to investigate some of currently open issues related to the formation and ...
Coppola, Giuseppina
core   +1 more source

Galaxy Zoo:dust in spiral galaxies [PDF]

, 2010
We investigate the effect of dust on spiral galaxies by measuring the inclination dependence of optical colours for 24 276 well-resolved Sloan Digital Sky Survey (SDSS) galaxies visually classified via the Galaxy Zoo project.
Masters, Karen L., Murray, P, Bamford, S, Slosar, Anze, Thomas, Daniel Georg, Vandenberg, J, Keel, WC, Bamford, Steven, Szalay, Alexander S., Mosleh, Moein, Andreescu, Dan, Bamford, Steven P., Andreescu, D, Thomas, Daniel, Thomas, D, Nichol, Robert, Nichol, R, Edmondson, Edward M., Vandenberg, Jan, Murray, Phil, Lintott, Chris J., Schawinski, Kevin, Masters, KL, Schawinski, K, Raddick, MJ, Keel, William C., Szalay, AS, Mosleh, M, Edmondson, EM, Slosar, A, Lintott, CJ, Nichol, RC, Raddick, M. Jordan   +32 more
core   +1 more source

Discovery of a low-surface-brightness galaxy in the Zone of Avoidance using VVVX Deepstack imaging

Astronomy & Astrophysics
We report the discovery of VVVX J080705.96−273823.6, the first low-surface-brightness galaxy candidate identified in the Zone of Avoidance by the VISTA Variables in the Vía Láctea eXtended Survey (VVVX).
Nilo-Castellón J. L., Baravalle L., Minniti D., Alonso M. V., Galaz G., Villalon C., Hinojosa R., Schmidt E. O., Valotto C., Soto M., Rivera E. G., Valdivia-Rojas V., Alvarez-Rocha D., Marchant Cortés P., Cross N. J. G.   +14 more
doaj   +1 more source

Nuclear Activity in the Low-metallicity Dwarf Galaxy SDSS J0944-0038 : A Glimpse into the Primordial Universe

The Astrophysical Journal Letters, 2023
Local low-metallicity dwarf galaxies are relics of the early universe and are thought to hold clues into the origins of supermassive black holes. While recent studies are uncovering a growing population of active galactic nuclei (AGNs) in dwarf galaxies,
Michael Reefe, Shobita Satyapal, Remington O. Sexton, Nathan J. Secrest, William Matzko, Emma Schwartzman, Kristina Nyland, Gabriela Canalizo, Barry Rothberg, Ryan W. Pfeifle, Jenna M. Cann, Archana Aravindan, Camilo Vazquez, Tracy Clarke   +13 more
doaj   +1 more source

Investigation on tunnel stability considering pipe‐roof support with transparent soil technology

Deep Underground Science and Engineering, EarlyView.
This study integrates transparent soil technology, 3D reconstruction and numerical simulation to captures the full‐field deformation of shield tunnel instability. Results demonstrate that pipe‐roof support enhances stability via the “soil‐arching barrier effect,” effectively restraining failure wedge development by extending stress transfer paths ...
Zhi Jia, Yunpeng Ji, Zhao Lu, Honghua Zhao, Limin Zhang   +4 more
wiley   +1 more source

Line-strength indices and velocity dispersions for 148 early-type galaxies in different environments [PDF]

, 2002
We have derived high quality line-strength indices and velocity dispersions for a sample of 148 early-type galaxies in different environments. The wavelength region covered by the observations ($\lambda \simeq 4600$ to 6600 Å) includes the Lick/IDS ...
R. Bender, Beuing, J., Bender, R., C. Mendes de Oliveira, D. Thomas, J. Beuing, de Oliveira, C. M., Thomas, D., Maraston, C., C. Maraston   +9 more
core   +1 more source

100 Proof: H i Observations of 100 Nearby Dwarf Galaxies with the 100 m Green Bank Telescope

The Astronomical Journal
We describe the results of observations with the 100 m Robert C. Byrd Green Bank Telescope in the H i line of 105 nearby dwarf galaxies, 60 of which were discovered recently in the DESI Legacy Imaging Surveys.
Aleksandra E. Nazarova, John M. Cannon, Igor D. Karachentsev, Dmitry I. Makarov, Maksim I. Chazov, Lila Schisgal, William St. John   +6 more
doaj   +1 more source

J-PAS: Unprecedented precision in stellar populations of diffuse tidal features

Astronomy & Astrophysics
Galaxies frequently interact with nearby systems, which can significantly alter their morphology and star formation activity. However, spectroscopic studies of their faint and diffuse remnants require very long exposure times and often exceed the limited
Eskandarlou Sepideh, Akhlaghi Mohammad, Arizo-Borillo Francisco, Knapen Johan H., Domínguez Sánchez Helena, Fernández-Ontiveros Juan Antonio, López-Sanjuan Carlos, María González Delgado Rosa, Jiménez Teja Yolanda, Dupke Renato, Revaz Yves, Jablonka Pascale, Roca-Fábrega Santi, Miró-Carretero Juan, Martínez-Delgado David, Lumbreras-Calle Alejandro, Hernán-Caballero Antonio, Vázquez Ramió Héctor, Infante-Sainz Raúl, Chies-Santos Ana L., Zaragoza-Cardiel Javier, Ederoclite Alessandro, Rodríguez Martín Julio Esteban, Abramo Raul, Alcaniz Jailson, Benitez Narciso, Bonoli Silvia, Cenarro Javier, Cristóbal-Hornillos David, Daflon Simone, Hernández–Monteagudo Carlos, Liu Jifeng, Marín Franch Antonio, Mendes de Oliveira Claudia, Moles Mariano, Roig Fernando, Sodré Laerte, Taylor Keith, Varela Jesús, Manuel Vilchez José   +39 more
doaj   +1 more source

‘A Sort of Armed Argument’: Ireland's Civil War of Words

History, EarlyView.
Abstract This article sets out to contribute to the study of the languages of European civil wars through outlining and analysing the deployment of language as a weapon by the opposing sides of the Irish independence movement that split over the terms of the Anglo‐Irish Treaty of December 1921.
DONAL Ó DRISCEOIL
wiley   +1 more source