Results 71 to 80 of about 590 (185)

[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

The Rise of Ionized Gas Filaments in Early-Type Galaxies

The Open Journal of Astrophysics
Multiphase filamentary nebulae are ubiquitous in the brightest cluster galaxies (BCGs) of cool-core clusters, providing key insights into the cycle of baryons and the feeding and feedback of supermassive black holes. However, BCGs account for less than 1%
Ryan Eskenasy, Valeria Olivares, Yuanyuan Su   +2 more
doaj   +1 more source

Star Formation, Nebulae, and Active Galactic Nuclei in CLASH Brightest Cluster Galaxies. I. Dependence on Core Entropy of Intracluster Medium

The Astrophysical Journal
We set the stage for reassessing how star formation, emission-line nebulae, and active galactic nuclei (AGNs) in brightest cluster galaxies (BCGs) depend on the thermodynamics of the intracluster medium (ICM).
Arsen Levitskiy, Jeremy Lim, Youichi Ohyama, Juno Li, Megan Donahue   +4 more
doaj   +1 more source

Observations of the 3.3μm Emission Feature in Planetary Nebulae [PDF]

Symposium - International Astronomical Union, 1983
Absolute fluxes of the 3.3μm features were measured for 12 planetary nebulae. Both narrow-band photometry and low resolution spectrophotometry were used. Photometry was performed with narrow bandpass filters centered at 3.28μm and 3.72μm(λ/Δλ = 14). Using a CVF spectrophotometer, the 3.1μm – 3.8μm spectra of four nebulae (IC 418, IC 2149, NGC 6543, NGC
openaire   +1 more source

The Green Chile Project. I. A New Catalog of Low-redshift Extended Emission-line Nebulae

The Astronomical Journal
Extended emission-line nebulae (EELN) around galaxies allow us to study their host galaxies and their surrounding environments. EELN can provide insights into the physical properties of the extended gas and, when powered by active galactic nuclei (AGN ...
Audrey F. Dijeau, Moire K. M. Prescott, Kelly N. Sanderson   +2 more
doaj   +1 more source

Illuminating the Incidence of Extraplanar Dust Using Ultraviolet Reflection Nebulae with GALEX

The Astrophysical Journal
Circumgalactic dust grains trace the circulation of mass and metals between star-forming regions and gaseous galactic halos, giving insight into feedback and tidal stripping processes.
Erin Boettcher, Edmund Hodges-Kluck
doaj   +1 more source

Oxyster: A Circumgalactic Low-ionization Oxygen Nebula next to a Starburst Galaxy at z ∼ 1

The Astrophysical Journal
Extended emission line nebulae around galaxies or active galactic nuclei (AGNs) provide a unique window to investigate the galactic ecosystem through the circumgalactic medium (CGM).
Pengjun Lu, Mingyu Li, Dalya Baron, Minghao Yue, Song Huang, Zheng Cai   +5 more
doaj   +1 more source

Discovery of spectacular quasar-driven superbubbles in red quasars. [PDF]

Sci Adv, 2023
Shen L, Liu G, He Z, Zakamska NL, Glikman E, Greene JE, Hu W, Mou G, Wylezalek D, Rupke DSN.   +9 more
europepmc   +1 more source

Galactic Gamma-Ray Diffuse Emission at TeV Energies with HAWC Data

The Astrophysical Journal
Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons, and electrons, interacting with gas and electromagnetic radiation fields in the interstellar medium.
R. Alfaro, C. Alvarez, J. C. Arteaga-Velázquez, K. P. Arunbabu, D. Avila Rojas, R. Babu, V. Baghmanyan, E. Belmont-Moreno, C. Brisbois, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, O. Chaparro-Amaro, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, R. Diaz Hernandez, M. A. DuVernois, M. Durocher, J. C. Díaz-Vélez, K. Engel, C. Espinoza, K. L. Fan, N. Fraija, A. Galván-Gámez, J. A. García-González, F. Garfias, M. M. González, J. A. Goodman, S. Hernandez, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, T. B. Humensky, A. Iriarte, V. Joshi, S. Kaufmann, D. Kieda, G. J. Kunde, A. Lara, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, A. Nayerhoda, L. Nellen, R. Noriega-Papaqui, E. G. Pérez-Pérez, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, D. Salazar-Gallegos, F. Salesa Greus, A. Sandoval, J. Serna-Franco, A. J. Smith, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, F. Ureña-Mena, L. Villaseñor, E. Willox, H. Zhou, C. de León, O. Fornieri, D. Gaggero, D. Grasso, A. Marinelli, S. Ventura, HAWC Collaboration   +80 more
doaj   +1 more source

Independent Emission and Absorption Abundances for Planetary Nebulae

, 2008
Emission-line abundances have been uncertain for more than a decade due to unexplained discrepancies in the relative intensities of the forbidden lines and weak permitted recombination lines in planetary nebulae (PNe) and H II regions. The observed intensities of forbidden and recombination lines originating from the same parent ion differ from their ...
Zhang, Y, Williams, R, Jenkins, EB, Phillips, M, Pellegrini, E, Baldwin, JA, Sharpee, B   +6 more
openaire   +4 more sources