Sentences with phrase «seyfert host galaxies»

«NGC 1277's black hole could be many times more massive than its largest known compete tor, which is estimated but not confirmed to be between 6 billion and 37 billion solar masses in size.It makes up about 59 percent of its host galaxy's central mass — the bulge of stars at the core.

The KIAA - led research team proposes that globular clusters can sweep up stray gas and dust they encounter while moving about their respective host galaxies.

Finding the first seed black holes could help reveal how the relation between black holes and their host galaxies evolved over time.

Supermassive black holes lurk in the cores of most galaxies, and when they gobble up matter they also heat the surrounding gas and expel it from the host galaxy in powerful, dense winds [2].

Throughout the universe, countless small galaxies rotate around larger host galaxies — our Milky Way has at least a few dozen hangers - on — and theory predicts that they should move randomly.

«When more - powerful detectors provide us with more observations,» Mészáros said, «we also will be able to use Fast Radio Bursts as a probe of their host galaxies, of the space between galaxies, of the cosmic - web structure of the universe, and as a test of fundamental physics.»

«Supermassive black holes and their host galaxies grow in - situ,» Pasham says.

«This could also explain how the most massive black holes were able to both suppress run - away starbursts and regulate the growth of their host galaxies over the past six billion years or so of cosmic history,» noted Russell.

And the gamma - ray emission from FRB 131104 outshines its radio emissions by more than a billion times, dramatically raising estimates of the burst's energy requirements and suggesting severe consequences for the burst's surroundings and host galaxy.

This illustrates how black holes can slow the growth of their host galaxies.»

Gal - Yam thinks the conditions in the host galaxy could be like those in the early universe, when theory says such giant stars were born and died in great numbers, seeding the universe with heavy elements.

Supernovae are exploding stars that are so bright they can briefly outshine their host galaxies.

Supernovas happen when huge stars run out of fuel and collapse, creating an explosion that can briefly outshine their host galaxy.

Using radio telescopes in Australia and optical telescopes in Hawaii, Keane and his colleagues detected an FRB and linked its fading afterglow to a host galaxy some six billion light - years from Earth.

But plasma within an FRB's host galaxy should contribute to the dispersion, too, muddying the distance estimates for any given FRB.

Although the team has stared into the repeating FRB's patch of sky using several telescopes, they have yet to locate a likely host galaxy.

The origin of massive black holes and their host galaxies is a chicken - and - egg conundrum.

Subsequently bits and pieces swirl into the black hole and thus produce huge flares of radiation that can be as luminous as all the rest of the stars in the host galaxy for a period of a few months to a year.

An easier approach was developed 2 years ago, after astronomers found a strong correlation between a black hole's mass and the velocity dispersion of its host galaxy.

Astronomers seeking mysterious fast radio bursts have traced one back to its host galaxy — and found such signals could have more than one type of source

«Finding the host galaxy of this FRB, and its distance, is a big step forward, but we still have much more to do before we fully understand what these things are,» Chatterjee said.

«Surprisingly, the host galaxy [of FRB 121102] is a puny, star - forming dwarf system,» says ASTRON's Cees Bassa, who led the optical observations together with Shriharsh Tendulkar of McGill University in Montreal, Canada.

A small portion of one of the fields from the Supernova Legacy Survey showing SNLS - 06D4eu and its host galaxy (arrow).

It took subsequent observations of the faint host galaxy with the VLT in Chile for astronomers to determine the distance and energy of the explosions.

Other evidence comes from the analysis of modern galaxies, most of which have central black holes whose masses seem to correlate closely with the properties of their host galaxies.

The suite of telescopes shows how galaxy ecosystems work, including the black hole and its influence on its host galaxy and the gas surrounding that galaxy.

But in 11 of Bahcall's 15 images, the quasars seemed to stand alone — naked, without host galaxies to shelter and fuel them.

The estimated ages of the red stars suggest that their host galaxies ceased to make new stars about ten billion years ago.

And while the original naked quasars are still naked, he says, many of the new ones do show evidence — in some cases, quite dramatic evidence — of very normal - looking host galaxies.

Since type Ia supernovae have a very clearly defined brightness [3], they can be used to measure the distance to the host galaxy; in this case, 60 million light - years.

This process kills quasars after short lifetimes while stifling the birth of new stars in their host galaxies, according to a new simulation.

In computer simulations, the researchers show that a black hole can rapidly grow at the center of its host galaxy if a nearby galaxy emits enough radiation to switch off its capacity to form stars.

In a 2008 study, Haiman and his colleagues hypothesized that radiation from a massive neighboring galaxy could split molecular hydrogen into atomic hydrogen and cause the nascent black hole and its host galaxy to collapse rather than spawn new clusters of stars.

The massive black hole shown at left in this drawing is able to rapidly grow as intense radiation from a galaxy nearby shuts down star - formation in its host galaxy.

«We've known for awhile that minor mergers can have visible effects on their host galaxies,» says David Law, an astrophysicist at the University of Toronto's Dunlap Institute for Astronomy and Astrophysics, who did not contribute to the new study.

This sounds reasonable at first, but host galaxies are 10 billion times bigger than the central black holes; it should be difficult for two objects of such vastly different scales to directly affect each other.

The team calculated the black hole's distance from the core by comparing the distribution of starlight in the host galaxy with that of a normal elliptical galaxy from a computer model.

In principle, Tanvir says, a bright, well - observed GRB at great distances could expose the makeup of the intergalactic medium as well as the chemistry of the star's host galaxy, which would in turn indicate the products of previous generations of stars.

The quasar and its host galaxy reside 8 billion light - years from Earth.

In late February and March of this year, Williams and Berger investigated the supposed host galaxy in detail using the NSF's Jansky Very Large Array network of radio telescopes.

The most plausible explanation for this propulsive energy is that the monster object was given a kick by gravitational waves unleashed by the merger of two hefty black holes at the center of the host galaxy.

The team also compared the masses of the black holes with the total masses of their host galaxies to determine how much matter they had swallowed.

Now Arlin Crotts of Columbia University, New York, is watching the light from this stellar explosion echo around host galaxy M82, also known as the Cigar Galaxy (arxiv.org/abs/1409.8671).

Quasars can shine more brightly than all the stars in the rest of their host galaxies put together.

One possible explanation for the hugely magnetized environment is that FRB 121102 is located close to a massive black hole in its host galaxy.

The characterization of the quasar host galaxy was carried out with the IRAM / NOEMA and JVLA interferometers and the findings are reported in a companion article published in The Astrophysical Journal Letters led by Bram Venemans.

Black holes and their host galaxies have a tight relationship: Regardless of their size, the central swarms of stars in galaxies are always about 500 times more massive than the giant black holes they contain (ScienceNOW, 5 June 2000).

«Knowing more about the black holes powering quasars will allow us to know more about how galaxies develop,» said Marta Volonteri, the research director at the Observatory of Paris and the principal investigator of the BLACK project, which investigates how supermassive black holes influenced their host galaxies, especially as quasars, in the early universe.

The resulting debris is absorbed into the disk of the more massive host galaxy before it approaches the center.

It is also located in a much smaller and younger host galaxy, and is only detected during a single, several - hour burst.