Author Topic: ESA - XMM-Newton updates  (Read 21845 times)

Offline bolun

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Re: ESA - XMM-Newton updates
« Reply #40 on: 06/24/2018 07:44 pm »
XMM-NEWTON FINDS MISSING INTERGALACTIC MATERIAL

20 June 2018

After a nearly twenty-year long game of cosmic hide-and-seek, astronomers using ESA's XMM-Newton space observatory have finally found evidence of hot, diffuse gas permeating the cosmos, closing a puzzling gap in the overall budget of 'normal' matter in the Universe.

http://sci.esa.int/xmm-newton/60427-xmm-newton-finds-missing-intergalactic-material/

Image credit: ESA

Offline bolun

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Re: ESA - XMM-Newton updates
« Reply #41 on: 08/13/2018 07:28 pm »
FLARING SOURCE IN NGC 6540

A peculiar X-ray source spotted in the globular cluster NGC 6540 as part of a collaboration between scientists at the National Institute of Astrophysics (INAF) in Milan, Italy, and a group of students from a local high school.

In 2005, ESA's XMM-Newton saw this source undergo a flare that boosted the luminosity of the source by up to 50 times its normal level for about five minutes.

Too short to be an ordinary stellar flare, but too faint to be linked to a compact object, this event is challenging our understanding of X-ray outbursts.

- Related article: Students digging into data archive spot mysterious X-ray source

http://sci.esa.int/xmm-newton/60535-flaring-source-in-ngc-6540/

Image credit: ESA/XMM-Newton; A. De Carlo (INAF)
« Last Edit: 08/13/2018 08:54 pm by bolun »

Offline bolun

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Re: ESA - XMM-Newton updates
« Reply #42 on: 10/05/2018 11:18 am »
TRACING THE UNIVERSE: X-RAY SURVEY SUPPORTS STANDARD COSMOLOGICAL MODEL

04 October 2018

Scanning the sky for X-ray sources, ESA's XMM-Newton X-ray observatory has been busy with the XXL Survey, its largest observational programme to date. The second batch of data from the survey has just been released, including information on 365 galaxy clusters, which trace the large-scale structure of the Universe and its evolution through time, and on 26 000 active galactic nuclei (AGN).

By examining two large regions of the sky at great sensitivity, this is the first X-ray survey to detect enough galaxy clusters and AGN in contiguous volumes of space to make it possible for scientists to map the distribution of these objects out to the distant Universe in unprecedented detail. The results are compatible with expectations from the currently-accepted cosmological model.

http://sci.esa.int/xmm-newton/60686-tracing-the-universe-x-ray-survey-supports-standard-cosmological-model/

Credits: ESA/XMM-Newton/XXL Survey and CFHT Legacy Survey/CTIO/XXL Survey

Offline bolun

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Re: ESA - XMM-Newton updates
« Reply #43 on: 11/24/2018 09:11 am »
FROM GAMMA RAYS TO X-RAYS: NEW METHOD PINPOINTS PREVIOUSLY UNNOTICED PULSAR EMISSION

21 November 2018

Based on a new theoretical model, a team of scientists explored the rich data archive of ESA's XMM-Newton and NASA's Chandra space observatories to find pulsating X-ray emission from three sources. The discovery, relying on previous gamma-ray observations of the pulsars, provides a novel tool to investigate the mysterious mechanisms of pulsar emission, which will be important to understand these fascinating objects and use them for space navigation in the future.

http://sci.esa.int/xmm-newton/60950-from-gamma-rays-to-x-rays-new-method-pinpoints-previously-unnoticed-pulsar-emission/

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