Results 61 to 70 of about 771 (176)

The relationship between the emission line, continuum luminosity, and Baldwin effect in blazars

Astronomy & Astrophysics
Aims. This study investigates the relationship between the Mg II λ2798 Å emission line and the 3000 Å continuum luminosity, as well as the Baldwin effect, in a sample of 40’,685 radio-quiet (RQ) quasars and 441 flat spectrum radio quasars (FSRQs ...
Patiño-Álvarez Víctor M., Guerrero-González Jonhatan U., Chavushyan Vahram, Monjardin-Ward Douglas E., Arshakian Tigran G., Cruz-González Irene   +5 more
doaj   +1 more source

UEG Week 2023 Moderated Posters

, 2023
United European Gastroenterology Journal, Volume 11, Issue S8, Page 201-534, October 2023.
wiley   +1 more source

Optical Microvariability in Radio-quiet Quasars

The Astronomical Journal, 2006
We report the results of a study of optical microvariability in radio-quiet and radio-intermediate quasars. Observations were obtained on a total of seven objects: five radio-quiet quasars and two radio-intermediate quasars. No microvariability was detected in either the radio-quiet or radio-intermediate objects in our sample, despite intensive ...
M. T. Carini, J. C. Noble, R. Taylor, R. Culler   +3 more
openaire   +1 more source

Cosmic Supernova Neutrino and Gamma-Ray Backgrounds in the MeV Regime

The Astrophysical Journal, 2023
Cosmic multimessenger backgrounds include relic diffuse components created in the early universe and contributions from individual sources. Here, we study both type Ia supernovae (SNe Ia) and core-collapse supernovae (CCSNe) contributions to the diffuse ...
Samalka Anandagoda, Dieter H. Hartmann, Christopher L. Fryer, Marco Ajello, Abhishek Desai, Aimee L. Hungerford, Lih-Sin The   +6 more
doaj   +1 more source

UEG Week 2023 Poster Presentations

, 2023
United European Gastroenterology Journal, Volume 11, Issue S8, Page 535-1498, October 2023.
wiley   +1 more source

LoTSS/HETDEX:Disentangling star formation and AGN activity in gravitationally-lensed radio-quiet quasars [PDF]

, 2018
Determining the star-forming properties of radio-quiet quasars is important for understanding the co-evolution of star formation and black hole accretion.
L. K. Morabito, Tasse, C., Morabito, L.K., J. R. Callingham, Röttgering, H., Shimwell, TW, Hardcastle, M., I. Prandoni, McKean, J.P., Best, P.N., Mechev, AP, Gürkan, G., McKean, JP, Prandoni, I, Rivera, G. Calistro, Gurkan, G, Stacey, HR, Röttgering, H.J.A., Jackson, N. J., A. P. Mechev, Morabito, LK, Williams, W.L., Hardcastle, M.J., Hardcastle, M. J., Duncan, KJ, Jackson, NJ, Tasse, C, Stacey, H.R., P. N. Best, Iacobelli, M, Mechev, A., Duncan, K., J. Sabater, Röttgering, H. J.A., Jackson, N.J., Morabito, L., K. J. Duncan, H. R. Stacey, Jackson, N., Prandoni, I., G. Gürkan, Best, P., H. J. A. Röttgering, Stacey, H. R., Duncan, K. J., T. W. Shimwell, Callingham, JR, Shimwell, T.W., M. J. Hardcastle, Rottgering, HJA, Iacobelli, M., M. Iacobelli, Callingham, J.R., Williams, W., Röttgering, H. J. A., Callingham, J. R., PRANDONI, ISABELLA, Calistro Rivera, G., Duncan, K.J., J. P. McKean, Best, PN, Hardcastle, MJ, Sabater, J, W. L. Williams, Shimwell, T., Mechev, A.P., Shimwell, T. W., N. J. Jackson, G. Calistro Rivera, Mechev, A. P., Morabito, Leah, Sabater, J., Callingham, J., Morabito, L. K., Rivera, GC, Williams, WL, Stacey, H., McKean, J. P., Best, P. N., C. Tasse, Mckean, J., Williams, W. L.   +81 more
core   +1 more source

Quasar Winds Caught on Acceleration and Deceleration

The Astrophysical Journal Supplement Series
We present an observational study of wind acceleration based on four low-ionization broad absorption line (BAL) quasars (J0136, J1238, J1259, and J1344).
Weimin Yi, P. B. Hall, Zunli Yuan, W. N. Brandt, D. P. Schneider, Zhicheng He, Jin-Ming Bai, Xue-Bing Wu   +7 more
doaj   +1 more source

A unique UV flare in the optical light curve of the quasar J004457.9+412344

EPJ Web of Conferences, 2012
We found that the nova candidate J004457.9+412344 is a radio-quiet quasar at z ∼ 2. Its optical long-term light curve, covering more than half a century, shows quasar typical flux variations superimposed by a spectacular single flare lasting more than ...
Hatzidimitriou D., Williams B., Pietsch W., Birkle K., Henze M., Meusinger H., Nesci R., Ertel S., Hinze A., Bertold T., Kaminsky B.   +10 more
doaj   +1 more source

Deep Space Network Radio Science and Ground‐Based Planetary Radar in the Next Decade

Radio Science, Volume 60, Issue 7, July 2025.
Abstract The Deep Space Network (DSN) has been a core operational element of NASA's crewed and robotic exploration of the Solar System since the early 1960s. The primary role of the DSN has been to acquire telemetry and navigation data, but over the years, its radiometric and radar capabilities have expanded to form a system for obtaining unique ...
R. S. Park, J. E. Riedel, N. Rodriguez‐Alvarez, M. Brozovic, L. A. M. Benner, P. Vergados, D. Buccino, C. S. Jacobs, L. S. Locke, S. W. Asmar, R. Castano, T. J. W. Lazio, J. Jao, C. Lee   +13 more
wiley   +1 more source

Fundamental differences in the radio properties of red and blue quasars: enhanced compact AGN emission in red quasars [PDF]

, 2020
We have recently used the Faint Images of the Radio Sky at Twenty-centimeters (FIRST) survey to show that red quasars have fundamentally different radio properties to typical blue quasars: a significant (factor ≈3) enhancement in the radio-detection ...
Rosario, D.J., Alexander, D.M., Fotopoulou, S, Fawcett, V.A., Morabito, L.K., Calistro Rivera, G, Klindt, L, Fawcett, V A, Klindt, L., Fotopoulou, S., Calistro Rivera, G., Morabito, L K, Lusso, E., Rosario, D J, Alexander, D M, Lusso, E   +15 more
core   +1 more source