Results 21 to 30 of about 53,761 (176)

Extragalactic astronomy [PDF]

Nature, 1976
Simon Mitton
openaire   +2 more sources

Fixing the Reference Frame for PPMXL Proper Motions Using Extragalactic Sources [PDF]

, 2014
We quantify and correct systematic errors in PPMXL proper motions using extragalactic sources from the first two LAMOST data releases and the Veron-Cetty & Veron Catalog of Quasars.
Beers, Timothy C., Carlin, Jeffrey L., Chen, Li, Deng, Li-Cai, Grabowski, Kathleen, Grillmair, Carl J., Guhathakurta, Puragra, Hou, Jin-Liang, Hou, Yong-Hui, Liu, Chao, Liu, Xiao-Wei, Luo, A-Li, Lépine, Sébastien, Newberg, Heidi Jo, Smith, Martin C., Yanny, Brian, Zhang, Hao-Tong, Zhang, Yong, Zheng, Zheng   +18 more
core   +2 more sources

Probing the extragalactic fast transient sky at minute timescales with DECam [PDF]

, 2019
Searches for optical transients are usually performed with a cadence of days to weeks, optimised for supernova discovery. The optical fast transient sky is still largely unexplored, with only a few surveys to date having placed meaningful constraints on ...
Abbott, Timothy M. C., Andreoni, Igor, Bhandari, Shivani, Caleb, Manisha, Chang, Seo-Won, Cooke, Jeffrey, Cucchiara, Antonino, Farah, Wael, Flynn, Christopher M., Jankowski, Fabian, Keane, Evan F., Lien, Amy, Moriya, Takashi J., Möller, Anais, Onken, Christopher, Parthasarathy, Aditya, Petroff, Emily, Price, Daniel C., Pritchard, Tyler A., Ravasio, Maria Edvige, Rest, Armin, Ryder, Stuart, Vohl, Dany, Webb, Sara, Wolf, Christian   +24 more
core   +3 more sources

Book Review: Mathematical cosmology and extragalactic astronomy [PDF]

Bulletin of the American Mathematical Society, 1977
A. H. Taub
openaire   +2 more sources

Parsec-scale structure in the warm ISM from polarized galactic radio background observations [PDF]

, 2001
We present multi-frequency polarization observations of the diffuse radio synchrotron background modulated by Faraday rotation, in two directions of positive latitude.
de Bruyn, A. G., Haverkorn, M., Katgert, P.   +2 more
core   +3 more sources

Extragalactic Results from the Infrared Space Observatory

, 2000
More than a decade ago the IRAS satellite opened the realm of external galaxies for studies in the 10 to 100 micron band and discovered emission from tens of thousands of normal and active galaxies.
Acosta-Pulido JA, Afonso C, Alexander T, Altieri B, Alton PB, Aussel H, Aussel H, Awaki H, Binette L, Boller T, Boselli A, Boselli A, Boulade O, Braine J, Catherine J. Cesarsky, Cesarsky CJ, Cesarsky D, Cesarsky D, Chapman SC, Clavel J, Clegg PE, Clements DL, Contursi A, de Graauw T, Desert FX, Desert FX, Doherty RM, Duley WW, Efstathiou A, Elbaz D, Fadda D, Fischer J, Flores H, Franceschini A, Gilmore G, Haas M, Haas M, Haas M, Hippelein H, Kawara K, Kegel WH, Kessler MF, Knapp GR, Krügel E, Kunze D, Lagache G, Lagache G, Lagache G, Lai O, Laureijs RJ, Laurent O, Laurent O, Lemke D, Lemonon L, Lord SD, Lutz D, Lutz D, Lutz D, Lutz D, Mattila K, Mattila K, Metcalfe L, Mirabel IF, Mirabel IF, Moorwood AFM, Moorwood AFM, Najarro F, Nakagawa T, Oliva E, Pagani L, Pfenniger D, Puget JL, Puget JL, Radovich M, Reinhard Genzel, Rigopoulou D, Rigopoulou D, Rigopoulou D, Rodriguez Espinosa JM, Rouan D, Roussel H, Rowan-Robinson M, Schaerer D, Scott D, Scoville NZ, Serjeant S, Siebenmorgen R, Stickel M, Sturm E, Sturm E, Taniguchi Y, Taniguchi Y, Tecza M, Thornley MD, Tran DQ, Tuffs RJ, Unger SJ, Valentijn EA, Verstraete L, Viegas SM, Vignati P, Vigroux L, Walter R, Wilkes BJ   +103 more
core   +1 more source

RadioAstron space-VLBI project: studies of masers in star forming regions of our Galaxy and megamasers in external galaxies [PDF]

, 2017
Observations of the masers in the course of RadioAstron mission yielded detections of fringes for a number of sources in both water and hydroxyl maser transitions. Several sources display numerous ultra-compact details. This proves that implementation of
Alakoz, A. V., Baan, W. A., Shakhvorostova, N. N., Sobolev, A. M.   +3 more
core   +1 more source

A strict lower-limit EBL: Applications on gamma-ray absorption

, 2008
A strict lower limit flux for the extragalactic background light from ultraviolet to the far-infrared photon energies is presented. The spectral energy distribution is derived using an established EBL model based on galaxy formation. The model parameters
Felix A. Aharonian, Frank Rieger, Herve Dole, Tanja M. Kneiske, Werner Hofmann   +4 more
core   +1 more source

Perspectives of High Energy Neutrino Astronomy [PDF]

, 2006
This work discusses the perspectives to observe fluxes of high energy astrophysical neutrinos with the planned km3 telescopes. On the basis of the observations of GeV and TeV gamma-rays, and of ultra high energy cosmic rays, it is possible to construct ...
Barr, Berezinsky, Bertone, Brandt, Costantini, Dar, Engel, Falcke, Fletcher, Fukugita, Giacconi, Hauser, Heavens, Learned, Letessier-Selvon, Mannheim, Marconi, Mukherjee, Paolo Lipari, Piran, Semikoz, Stecker, Ueda, Waxman, Waxman, Zhang   +25 more
core   +4 more sources

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, Volume 347, Issue 3, March 2026.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source