Arp 187 is a radio galaxy and merger remnant located in the constellation Eridanus. It is an interacting galaxy pair (MCG-02-13-040). [2] It is included in the Atlas of Peculiar Galaxies in the category galaxies with narrow filaments.

2024年11月6日 · Supermassive black holes, like the one in galaxy Arp 187, can host active galactic nuclei (AGN) that emit powerful radiation and jets of ionized gas. Researchers discovered a “dying” AGN in Arp 187, showing signs of a core that recently went dark. Observations from telescopes like ALMA, VLA, and NuSTAR reveal radio jets but no active core.

2018年11月19日 · Arp 187 is one of the fading active galactic nuclei (AGN), whose AGN activity is currently decreasing in luminosity. We investigate the observational signatures of AGN in Arp 187, which trace various physical scales from less than 0.1 pc to the nearly 10 kpc, to estimate the longterm luminosity change over years.

We investigate optical, infrared, and radio active galactic nucleus (AGN) signs in the merger remnant Arp 187, which hosts luminous jets launched in the order o

2019年9月26日 · Kohei Ichikawa and collaborators study the peculiar case of Arp 187 (pictured), an infrared-bright galaxy that shows evidence of AGN activity on kiloparsec scales but with a nucleus that appears...

2019年1月9日 · Arp 187 is one of the fading active galactic nuclei (AGNs), whose AGN activity is currently decreasing in luminosity. We investigate the observational signatures of AGN in Arp 187, which trace various physical scales from less than 0.1 pc to the nearly 10 kpc, to estimate the long-term luminosity change over 10 4 yr.

2023年3月9日 · Arp 187 (MCG-02-13-040a, PGC 16691 and others), the odd galaxy just left of the bottom center, is part of Arp’s Galaxies (not classifiable as S or E): Narrow filaments class. IC 401 (PGC 16672 and others) is the large spiral near the top.

2019年9月19日 · Here we present the most drastic AGN luminosity decline by a factor of 10 3 constrained by a NuSTAR X-ray observation of the nearby galaxy Arp 187, which is a promising "dead" quasar whose current activity seems quiet but whose past activity of erg s −1 is still observable at a large scale by its

Arp 187 is one of the fading active galactic nuclei (AGNs), whose AGN activity is currently decreasing in luminosity. We investigate the observational signatures of AGN in Arp 187, which trace various physical scales from less than 0.1 pc to the nearly 10 kpc, to estimate the long-term luminosity change over 10<SUP>4</SUP> yr.

Here we present the most drastic AGN luminosity decline by a factor of ≳10 3 constrained by a NuSTAR X-ray observation of the nearby galaxy Arp 187, which is a promising “dead” quasar whose current activity seems quiet but whose past activity of …