Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Nathan Secrest"'
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 60 (2024)
Detecting active black holes in dwarf galaxies has proven to be a challenge due to their small size and weak electromagnetic signatures. Mid-infrared variability has emerged as a promising tool that can be used to detect active low-mass black holes i
Externí odkaz:
https://doaj.org/article/4b650dfafcd74a4f9f92b1675f48751e
Autor:
Nathan Secrest, Valeri Makarov
Gaia used a large sample of photometrically selected active galactic nuclei (AGNs) and quasars to remove the residual spin of its global proper motion system in order to achieve a maximally inertial reference frame. A small fraction of these referenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c928b151a955253fa15e9789cb4f6004
http://arxiv.org/abs/2206.04148
http://arxiv.org/abs/2206.04148
Autor:
Nathan Secrest, Valeri Makarov
A sample of $60,410$ bona fide optical quasars with astrometric proper motions in Gaia EDR3 and spectroscopic redshifts above 0.5 in an oval 8400 square degree area of the sky is constructed. Using orthogonal Zernike functions of polar coordinates, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab83d1013ec275be1ef40452007cfbdc
Autor:
Nathan Secrest, Valeri Makarov
Publikováno v:
The Astrophysical Journal Supplement Series. 264:4
Making use of strong correlations between closely separated multiple or double sources and photometric and astrometric metadata in Gaia EDR3, we generate a catalog of candidate double and multiply imaged lensed quasars and AGNs, comprising 3140 syste
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c2287e271f687f7b0f7b4bb404eb133
https://doi.org/10.3847/1538-4365/ac97f0
https://doi.org/10.3847/1538-4365/ac97f0
Autor:
Nathan Secrest
Publikováno v:
The Astrophysical Journal Letters. 939:L32
Using photometric variability information from the new Gaia DR3 release, I show for the first time that photometric variability is inversely correlated with the prevalence of optical-radio position offsets in the active galactic nuclei (AGNs) that co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6fc92c774eaff3f9a6e6870335b353a
https://doi.org/10.3847/2041-8213/ac8d5d
https://doi.org/10.3847/2041-8213/ac8d5d