Sentences with phrase «microlensing event»

Mike Turner of Fermilab, Chicago, has already pointed out that the observed microlensing events seem to be too rare to fit the idea of a dark halo full of brown dwarfs.

The Optical Gravitational Lensing Experiment IV (OGLE - IV) has just entered operation and a new program at Wise Observatory in Tel Aviv will begin operation following up on microlensing events next year.

As microlensing events are, by their nature, one - offs, astronomers needed another way to confirm the nature of OGLE -2007-BLG-349 and Hubble has been used to zoom in on the star system that triggered the 2007 brightening.

Microlensing is the unsung hero of exoplanet detection because microlensing events are impossible to predict and impossible to replicate, but can detect the types of planets that no other method is yet able to find.

The details of this particular microlensing event, the fourth the team has detected looking towards the LMC, have not yet been published.

So far, the group has detected about 50 microlensing events looking towards the Galactic bulge and four looking towards the LMC.

The Optical Gravitational Lensing Experiment (OGLE) observes millions of stars every night with telescopes in Chile to find microlensing events.

In this case, there were two separate microlensing events, one in 2008 that revealed the main star and suggested the presence of the planet, and one in 2010 that confirmed the presence of the planet and revealed the second star.

Jennifer Yee, an astronomer at the Harvard — Smithsonian Center for Astrophysics and KMTNet team member, says that longer monitoring would make it easier to detect the signals of rogue Earths — and to distinguish them from confounding effects such as stellar flares, which can mimic ultrashort microlensing events.

The duration of an entire microlensing event is several months, while the variation in brightening due to a planet lasts a few hours to a couple of days.

«WFIRST will make measurements like we have made for OGLE -2005-BLG-169 for virtually all the planetary microlensing events it observes.

We are unable to predict when most microlensing events will occur simply because we lack good measurements of the three - dimensional motion of most stars and so we can't predict when one star will cross in front of another.

microFUN is a global network of telescopes around the world dedicated to measuring rapidly - evolving microlensing events, and together they are capable of following an event like this with nearly 24 - hours of continuous coverage.

A team of researchers from two collaborations, KMTNet and the OGLE, or Optical Gravitational Lensing Experiment, announced their new planet - brown dwarf pair, calling it the «OGLE -2017-BLG-1522 microlensing event.»

The original microlensing event was detected in May, 2013 and was observed by OGLE around once per hour for many months.

The astronomers are most excited by the microlensing events associated with stars in the LMC, and described the first three of these events in the 10 April issue of Physical Review Letters (vol 74, p 2867).

The team has also found evidence to silence a minority of sceptics who argue that what most astronomers take to be microlensing events are actually caused by natural variations in the intrinsic brightness of the stars being observed.

Now G. Giudice, S. Mollerach and E. Roulet of CERN have proposed a new explanation for the microlensing events (CERN preprints TH.

The 2008 and 2010 events are part of the OGLE database, which contains 13,000 microlensing events that have been recorded since the project began.

Based on a statistical analysis of more than 2,600 microlensing events, drawn from six years of observations on about 50 million stars, the OGLE team estimates that there is perhaps one Jupiter - mass rogue planet for every four stars in the galaxy.

Of the more than 2,600 microlensing events the OGLE team observed and analyzed, six were «ultrashort,» lasting less than half a day — suggesting they were caused by objects somewhere between one and 10 times the Earth's mass.

These microlensing events, ranging from a few hours to a few days in duration, will enable astronomers to measure precisely the mass of this isolated red dwarf.

Microlensing events are random occurrences and don't depend on star selection.

The telescope will be able to observe foreground, planetary host stars approaching the background source stars prior to the microlensing events, and receding from the background source stars after the microlensing events.

So, when the PLANET collaboration detected 40 microlensing events, and noted that three contained exoplanets, they could do a statistical analysis to estimate the number of stars that have exoplanets in our galaxy.

«It is the first time we were able to completely resolve the source star and the lensing star after a microlensing event.

The observations, taken with the Near Infrared Camera 2 (NIRC2) on the Keck 2 telescope more than eight years after the microlensing event, provided a precise measurement of the foreground and background stars» relative motion.

Two red dwarfs and their accompanying gas giant were discovered through a microlensing event — but their true nature could only be confirmed by Hubble.

Microlensing events are caused when a massive object, like a planet or star, passes in front of a more distant background star.

By studying the microlensing event light - curve (i.e. how the brightening fluctuates with time), we can learn many things about the object (s) creating the lens.

Also, astronomers familiar with the signal are considering the possibility of a microlensing event — a distant radio source may have been momentarily amplified by HD164595 through the warping of spacetime, creating a cosmic lens, making the radio signal look like a suspect radio burst.

Two space - based telescopes teamed up with ground - based observatories to observe a microlensing event caused by a brow... view image

A microlensing event with a single lens star is a relatively simple event compared to microlensing with a two - object lens, like a binary star system or a star / planet system.

Because the microlensing event depends on one star moving across the sky relative to another, microlensing measurements can only be taken at that one time when the two stars align and can not be repeated.