Results 31 to 40 of about 533 (185)

Polarized Broad‐Line Emission from Low‐Luminosity Active Galactic Nuclei [PDF]

open access: yesThe Astrophysical Journal, 1999
28 pages, including 3 tables and 16 figures. Uses the emulateapj latex style file.
Barth, A. J.   +2 more
openaire   +2 more sources

The Size of the Radio‐Emitting Region in Low‐Luminosity Active Galactic Nuclei

open access: yesThe Astrophysical Journal, 2005
61 pages, 17 figures, 10 tables.
Anderson, James M., Ulvestad, James S.
openaire   +2 more sources

Multiwavelength and Environmental Properties of Variability Selected Low-luminosity Active Galactic Nuclei

open access: yesThe Astrophysical Journal
We present the multiwavelength and environmental properties of 37 variability-selected active galactic nuclei (AGNs), including 30 low-luminosity AGNs (LLAGNs), using a high cadence time-domain survey (All-Sky Automated Survey for SuperNovae) from a ...
Heechan Yuk, Xinyu Dai, Marko Mićić
doaj   +1 more source

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

open access: yesJournal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang   +3 more
wiley   +1 more source

A Radio Survey for Linear and Circular Polarization in Low-Luminosity Active Galactic Nuclei [PDF]

open access: yesThe Astrophysical Journal, 2002
We conducted a Very Large Array survey of eleven low luminosity active galactic nuclei for linear and circular polarization at 8.4 GHz. We detected circular polarization in one source (M81*) and linear polarization in 3 sources. Sensitivity limits were ~0.1% for both modes of polarization in 9 of 11 sources.
Bower, Geoffrey C.   +2 more
openaire   +2 more sources

Mid-infrared Properties of Narrow-line Seyfert 1 Galaxies Detected by LoTSS DR2

open access: yesThe Astrophysical Journal
Narrow-line Seyfert 1 galaxies (NLS1s), a subclass of active galactic nuclei (AGNs) in an early stage of the accretion process, are also found to host relativistic jets. However, currently known jetted NLS1s are rare. The majority of NLS1s are undetected
Xu-Liang Fan
doaj   +1 more source

Modular training resources for bioimage analysis

open access: yesJournal of Microscopy, EarlyView.
Abstract Modern microscopy enables us to measure structural and dynamical properties of many biological processes and is therefore an indispensable research tool. However, the amount and complexity of the produced imaging data is steadily increasing.
Christian Tischer   +17 more
wiley   +1 more source

Do LINER 2 galaxies harbour low-luminosity active galactic nuclei? [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2001
We use ROSAT HRI spatial data and ASCA spectral measurements for a sample of seven nearby, early type spiral galaxies, to address the question of whether a low-luminosity Active Galactic Nucleus (LLAGN) is present in galaxies that have a LINER 2 classification.
Roberts, TP, Schurch, NJ, Warwick, RS
openaire   +3 more sources

The Central Engine of Low-luminosity Radio Galaxy 3C 270 (NGC 4261)

open access: yesThe Astrophysical Journal
We present the polarization spectra of the nucleus of 3C 270. We confirm that the polarization angles of both the continuum and the emission lines are close to perpendicular to the jet direction after careful correction of interstellar polarization ...
Chengzhang Jiang   +3 more
doaj   +1 more source

Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

open access: yesThe Astrophysical Journal Letters, 2021
In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting ...
The EHT MWL Science Working Group   +745 more
doaj   +1 more source

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