7/6/2023 0 Comments Quasar science![]() ![]() Such a wind, which was driven by radiation from the quasar, may have created the bubbles found in the Teacup. The Chandra data also show evidence for hotter gas within the bubble, which may imply that a wind of material is blowing away from the black hole. The Chandra observations revealed a loop in x-ray emission, consistent with the "eastern bubble". The extended clouds around the Teacup AGN consist of an "eastern bubble", seen in optical images, and a "western bubble", only seen in radio images by the Very Large Array. studied the Teacup Galaxy, also known as the Teacup AGN or SDSS J1430+1339 in x-rays with Swift and Chandra. Galaxy zoo volunteers did identify this galaxy as a candidate Voorwerpje, but the emission was already described by earlier studies. This study found extended emissions around this galaxy and that the supermassive black hole accretion rate on the Mrk 463E nucleus changed by a factor 3–20 in the last 40,000 years, similar to other Voorwerpje galaxies. studied the galaxy Mrk 463 with VLT/MUSE, VLT/Sinfoni and ALMA. Among the telescopes used was the 6 meter BTA-6 at the Special Astrophysical Observatory of the Russian Academy of Science. This studies 8 of the original 19 Voorwerpjes in greater detail, focusing on "the host-galaxy properties and origin of the gas". Keel and others published a study in the Astrophysical Journal. This reports the finding of a Voorwerpje on the outskirts of the well-studied NGC 7252. Schweizer and others published a paper in the Astrophysical Journal. These were nicknamed 'Voorwerpjes' from the Dutch for 'small objects'. ![]() This search yielded a list of 19 galaxies with AGN-photoionized clouds detected to beyond 10 kiloparsecs from the nuclei. As a result of the interest in similar ionized clouds for the study of both the history and obscuration of Active Galactic Nucleus (AGN), participants in the Galaxy Zoo (GZ) project carried out a wide search for such clouds using data from the Sloan Digital Sky Survey (SDSS). Keel and others published a paper in the Monthly Notices of the Royal Astronomical Society. Voorwerpjes Ī Hubble Space Telescope combined image of eight quasar ionisation echoes, or Voorwerpjes. They hypothesized that the light comes from two sources: (1) a supermassive black hole at the center of IC 2497, and (2) light produced by an interaction of an energetic jet from the black hole and the gas surrounding IC 2497. On 17 June 2010, a group of researchers at the European VLBI Network (EVN) and the UK's Multi-Element Radio Linked Interferometer Network (MERLIN), proposed another related explanation. In this case, its effects on HsV would be still visible because of the distance of several tens of thousands of light years between HsV and the quasar in the nearby galaxy: HsV would show a " light echo" or "ghost image" of events that are older than those currently seen in the galaxy. One possible explanation for the missing light-source is that illumination from the assumed quasar was a transient phenomenon. This might well be due to a process known as AGN feedback. The quasar might have switched off in the last 200,000 years and is not visible in the available images. The quasar event is thought to have stimulated the bright emission that characterizes HsV. One hypothesis suggests that HsV consists of remnants of a small galaxy showing the impact of radiation from a bright quasar event that occurred in the center of IC 2497 about 100,000 years before how it is observed today. Ī 40-page comic and associated promotional offers about HsV and the story surrounding it were presented at the 24th Dragon Con in Atlanta on 3 September 2010, as well as first pictures of HsV from the Hubble Space Telescope. ![]() ![]() The youngest of these stars are several million years old. Radio observations indicate that this is due to an outflow of gas from IC 2497's core which is interacting with a small region of HsV to collapse and form stars. Star birth is occurring in the region of HsV that faces IC 2497. HsV has been shown to be at the same distance from Earth as the adjacent galaxy IC 2497, which is about 650 million light-years away. In an image taken with the Hubble Space Telescope, HsV is colored green, a standard false color that is used to represent the presence of several luminous emission lines of glowing oxygen. Hanny's Voorwerp (HsV) is about the size of a small galaxy and has a central hole over 16,000 light years across. Photographically, it appears as a bright blob close to spiral galaxy IC 2497 in the constellation Leo Minor. It was discovered in 2007 by Dutch schoolteacher Hanny van Arkel while she was participating as a volunteer in the Galaxy Zoo project, part of the Zooniverse group of citizen science websites. Hanny's Voorwerp / ˈ h ʌ n i z ˈ v ɔːr w ɛər p/, ( Dutch for Hanny's object) is a rare type of astronomical object called a quasar ionization echo. ![]()
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