Results 111 to 120 of about 719 (181)

J-HERTz: J-PLUS Heritage Exploration of Radio Targets at z < 5

open access: yesThe Astrophysical Journal Supplement Series
We introduce J-HERTz (J-PLUS Heritage Exploration of Radio Targets at z < 5), a new multiwavelength catalog that combines optical narrowband photometry from J-PLUS, infrared observations from the Wide-field Infrared Survey Explorer, and deep low ...
D. Fernández Gil   +19 more
doaj   +1 more source

J1406+0102: A Dust-obscured Galaxy Hiding a Super-Eddington Accretion System with Bright Radio Emission

open access: yesThe Astrophysical Journal
Recent high- z quasar observations strongly indicate that super-Eddington accretion is a crucial phase to describe the presence of supermassive black holes (SMBHs) with M _BH  ≳ 10 ^9 M _⊙ at z  ≳ 7.
Hikaru Fukuchi   +9 more
doaj   +1 more source

Observations of Low and Intermediate Spectral Peak Blazars with the Imaging X-Ray Polarimetry Explorer

open access: yesThe Astrophysical Journal
We present X-ray polarimetry observations from the Imaging X-ray Polarimetry Explorer (IXPE) of three low spectral peak and one intermediate spectral peak blazars, namely 3C 273, 3C 279, 3C 454.3, and S5 0716+714.
Herman L. Marshall   +164 more
doaj   +1 more source

New molecular species at redshift <i>z</i> = 0.89. [PDF]

open access: yesAstron Astrophys, 2020
Tercero B   +4 more
europepmc   +1 more source

Blackbody Quasar and Radio Source (BBQSORS): A Candidate of Transitional Little Red Dots with a T ∼ 104 K Blackbody Spectrum

open access: yesThe Astrophysical Journal Letters
JWST surveys have identified a new class of active galactic nuclei (AGNs) called little red dots (LRDs). Their observational properties challenge the canonical AGN paradigm and provide key insights into the early growth phase of the supermassive black ...
Yuxing Zhong   +14 more
doaj   +1 more source

Multiwavelength analysis of the variability of the blazar 3C 273. [PDF]

open access: yesMon Not R Astron Soc, 2020
Fernandes S   +4 more
europepmc   +1 more source

VLASS-based Survey of Transition State Galaxies and Their Relationship to Compact Peaked-spectrum Radio Sources

open access: yesThe Astrophysical Journal Supplement Series
We present multifrequency and high-resolution studies of a sample of 24 radio transient sources discovered by comparing the NRAO VLA Sky Survey and the Very Large Array Sky Survey.
Magdalena Kunert-Bajraszewska   +8 more
doaj   +1 more source

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