Zobrazeno 1 - 10
of 110
pro vyhledávání: '"L. E. Chen"'
Publikováno v:
Research in Astronomy and Astrophysics. 15:929-938
We compiled the radio, optical and X-ray data of blazars from the Sloan Digital Sky Survey database, and presented the distribution of luminosities and broad-band spectral indices. The distribution of luminosities shows that the averaged luminosity o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9595ef43097e4f11e6ba458f7e7276fa
https://doi.org/10.1088/1674-4527/15/7/001
https://doi.org/10.1088/1674-4527/15/7/001
Publikováno v:
Publications of the Astronomical Society of the Pacific. 127:1-15
We have analyzed the light curves of 3C 454.3 at the infrared, optical, soft X-ray (0.3-10 keV), and γ-ray (0.1-300 GeV) waveband, and found the evidence of quasi-periodicity. The light curves show that 3C 454.3 is a strongly active object. A period
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::572d7ee7856627b601a20afdcf46b03b
https://doi.org/10.1086/679753
https://doi.org/10.1086/679753
Publikováno v:
Research in Astronomy and Astrophysics. 13:5-14
Using a large sample of blazars of the Fermi observations presented by Abdo et al., we constructed a sample of blazars including high energy peaked BL Lac objects (HBLs), low energy peaked BL Lac objects (LBLs) and flat-spectral ra- dio quasars (FSRQ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83e9ef051513979ea1bed01c21a932ed
https://doi.org/10.1088/1674-4527/13/1/002
https://doi.org/10.1088/1674-4527/13/1/002
Publikováno v:
Lin chuang er bi yan hou tou jing wai ke za zhi = Journal of clinical otorhinolaryngology, head, and neck surgery. 30(17)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::2dfd5b081e5085b3443054fb49423583
https://pubmed.ncbi.nlm.nih.gov/29798454
https://pubmed.ncbi.nlm.nih.gov/29798454
Autor:
H. Z. Li, L. E. Chen
Publikováno v:
Journal of Astrophysics and Astronomy. 35:387-389
We compiled the radio, optical and X-ray data for SDSS sample, and presented broad band spectral index. The broad band energy distribution reveals that FSRQs and LBLs objects have similar spectral properties. However, HBLs have a separate distinct pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43161473738c0cfe6cf83d426cae7514
https://doi.org/10.1007/s12036-014-9237-5
https://doi.org/10.1007/s12036-014-9237-5
Autor:
H. Z. Li, T.F. Yi, W.W. Na, Y.Y. Bao, Y.K. Tang, H. Dai, L.Z. Lü, Guang-Zhong Xie, J.Y. Ren, L. E. Chen
Publikováno v:
New Astronomy. 15:254-259
We have analyzed the radio light curves of the Seyfert galaxy III Zw 2 at 2:? and 37 GHz taken from the database of Metsahovi Radio Observatory, and found evidence of quasi-periodic activity. The light curves show great activity, with very complicate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68f3d937792a4ee4343bdf897ab0f47d
https://doi.org/10.1016/j.newast.2009.08.001
https://doi.org/10.1016/j.newast.2009.08.001
Publikováno v:
Publications of the Astronomical Society of the Pacific. 121:1172-1179
We have analyzed the light curves of 3C 279 at 22 GHz, 37 GHz, optical R band, and X-ray (2-10 KeV), and found evidence of quasi-periodic outbusts. The light curves show that 3C 279 is an extremely active object. A period of P = 130:6 +/- 1:3 days wa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3a12713b4b4794f8fd295b8ee3c61ef
https://doi.org/10.1086/648433
https://doi.org/10.1086/648433
Autor:
Jeffrey G. Jarvik, Patrick H. Luetmer, Waleed Brinjikji, Safwan Halabi, J. Turner, John T. Wald, David F. Kallmes, Andrew L. Avins, L. E. Chen, Brian W. Bresnahan, Richard A. Deyo, Bryan A. Comstock, Kathryn T. James
Publikováno v:
AJNR. American journal of neuroradiology. 36(4)
BACKGROUND AND PURPOSE: Degenerative changes are commonly found in spine imaging but often occur in pain-free individuals as well as those with back pain. We sought to estimate the prevalence, by age, of common degenerative spine conditions by perfor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c36d36f6d287390f45a5f38fdfddd7a
https://pubmed.ncbi.nlm.nih.gov/25430861
https://pubmed.ncbi.nlm.nih.gov/25430861
Autor:
James L. Salzer, William D. Matthew, D. Lawson, Willem Hendrik Gispen, Peter Canoll, I. J. Isaacs, D. I. Gwynne, L. E. Chen, M. A. Marchionni, W. F. Holt, Nagesh K. Mahanthappa, R. Reynolds, D. Meun, Cedric S. Raine, Eva S. Anton, Frank P.T. Hamers, C. J. Hoban, C. J. Kirk, B. Cannella, C. Chen, F. Wason
Publikováno v:
Cold Spring Harbor Symposia on Quantitative Biology. 61:459-472
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f2f9696ff547b6d0533460b2335ce5d
https://doi.org/10.1101/sqb.1996.061.01.048
https://doi.org/10.1101/sqb.1996.061.01.048
Publikováno v:
Journal of Astrophysics and Astronomy. 35:463-464
We have collected a sample of 86 blazars and analysed the redshift z, the accretion rate \(\dot {m}\) and the spectral index of the sample.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::661f2b05a1c4a7fab55ee0c875ee9ab3
https://doi.org/10.1007/s12036-014-9253-5
https://doi.org/10.1007/s12036-014-9253-5