Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Barthel, Peter D."'
Publikováno v:
A&A 640, A68 (2020)
Spitzer/IRAC color selection is a promising technique to identify hot accreting nuclei, that is to say AGN, in galaxies. We demonstrate this using a small sample of SAURON galaxies, and explore this further. The goal of this study is to find a simple
Externí odkaz:
http://arxiv.org/abs/2006.09476
Autor:
Radcliffe, Jack F., Beswick, Robert. J., Thomson, A. P., Garrett, Michael A., Barthel, Peter D., Muxlow, Thomas W. B.
The mJy variable extragalactic radio sky is known to be broadly non-changing with approximately $3\%$ of persistent radio sources exhibiting variability which is largely AGN-related. In the faint (
Externí odkaz:
http://arxiv.org/abs/1909.12588
Autor:
Kawada, Mitsunobu, Baba, Hajime, Barthel, Peter D., Clements, David, Cohen, Martin, Doi, Yasuo, Figueredo, Elysandra, Fujiwara, Mikio, Goto, Tomotsugu, Hasegawa, Sunao, Hibi, Yasunori, Hirao, Takanori, Hiromoto, Norihisa, Jeong, Woong-Seob, Kaneda, Hidehiro, Kawai, Toshihide, Kawamura, Akiko, Kester, Do, Kii, Tsuneo, Kobayashi, Hisato, Kwon, Suk Minn, Lee, Hyung Mok, Makiuti, Sin'itirou, Matsuo, Hiroshi, Matsuura, Shuji, Müller, Thomas G., Murakami, Noriko, Nagata, Hirohisa, Nakagawa, Takao, Narita, Masanao, Noda, Manabu, Oh, Sang Hoon, Okada, Yoko, Okuda, Haruyuki, Oliver, Sebastian, Ootsubo, Takafumi, Pak, Soojong, Park, Yong-Sun, Pearson, Chris P., Rowan-Robinson, Michael, Saito, Toshinobu, Salama, Alberto, Sato, Shinji, Savage, Richard S., Serjeant, Stephen, Shibai, Hiroshi, Shirahata, Mai, Sohn, Jungjoo, Suzuki, Toyoaki, Takagi, Toshinobu, Takahashi, Hidenori, Thomson, Matthew, Usui, Fumihiko, Verdugo, Eva, Watabe, Toyoki, White, Glenn J., Wang, Lingyu, Yamamura, Issei, Yamamuchi, Chisato, Yasuda, Akiko
The Far-Infrared Surveyor (FIS) is one of two focal plane instruments on the AKARI satellite. FIS has four photometric bands at 65, 90, 140, and 160 um, and uses two kinds of array detectors. The FIS arrays and optics are designed to sweep the sky wi
Externí odkaz:
http://arxiv.org/abs/0708.3004
AGN with the so-called `double-double' radio structure have been interpreted as restarted AGN where the inner structure is a manifestation of a new phase of activity which happened to begin before the outer radio lobes resulting from the previous one
Externí odkaz:
http://arxiv.org/abs/astro-ph/0209212
Publikováno v:
Astrophys.J.Suppl. 142 (2002) 223-238; Erratum-ibid. 144 (2002) 211
Arcsec-resolution VLA observations -- newly obtained as well as published -- of 40 nearby galaxies are discussed, completing a study of the radio properties of a magnitude-limited sample of nearby galaxies of the composite LINER/HII type. Our results
Externí odkaz:
http://arxiv.org/abs/astro-ph/0205196
The LINER galaxies NGC 2911, NGC 3079, NGC 3998, and NGC 6500 were observed at 5 GHz with the European VLBI Network at a resolution of 5 milliarcsecond and found to possess flat-spectrum, variable, high-brightness temperature ($T_{\rm B} > 10^8$ K) r
Externí odkaz:
http://arxiv.org/abs/astro-ph/0201505
Publikováno v:
A&A 359, 523 (2000)
In order to check for consistency with the radio-loud AGN unification scheme, ISOPHOT data obtained for two small sets of intermediate redshift steep-spectrum 3CR radio galaxies and quasars are being examined. Supplementary submillimeter and centimet
Externí odkaz:
http://arxiv.org/abs/astro-ph/0005196
Publikováno v:
Astrophys.J.Suppl. 129 (2000) 93-110
A sample of 37 nearby galaxies displaying composite LINER/HII and pure HII spectra was observed with the VLA in an investigation of the nature of their weak radio emission. The resulting radio contour maps overlaid on optical galaxy images are presen
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002404
VLA imaging at kiloparsec-scale resolution of sixteen core-dominated radio-loud QSOs is presented. Many objects appear to display variable radio emission and their radio morphologies are significantly smaller than those of steep-spectrum quasars, con
Externí odkaz:
http://arxiv.org/abs/astro-ph/9911474
In order to test the unification scheme for double-lobed radio sources, the far-infrared properties of matched samples of radio-galaxies and radio-loud quasars were studied using ISOPHOT. The quasar data were complemented with nearly simultaneous sub
Externí odkaz:
http://arxiv.org/abs/astro-ph/9902143