Massive stars produced at the collapse of giant molecular clouds, form compact groups and remain tightly linked during their entire life. Acceleration of particles in these objects can be initiated by interacting winds directly in the vicinity of stars or in the so-called superbubbles driven by stellar winds and SN explosions (see Figure).
The conditions in these objects can be more favorable for particle acceleration to PeV energies than in individual SNRs. This makes the clusters of massive young stars an attractive alternative to SNRs as CR factories contributing to the highest energy CRs around the “knee”.
DIAS researchers have led a team to report on a compelling similarity of the energy and radial distributions of multi-TeV protons extracted from observations of gamma-ray from these extended structures surrounding three young star clusters (for detail see https://www.nature.com/articles/s41550-019-0724-0). The derived 1/r decrement of the CR density with the distance from a star cluster is a distinct signature of continuous, over a few million years, cosmic ray injection into the interstellar medium. The hard (E-2.3 type) energy spectra and the required high acceleration efficiency derived from gamma-ray data, point to clusters of young massive stars as promising candidates for cosmic PeVatrons (accelerators boosting the energy of protons up to energy 1 PeV=1015 eV) and dominant contributors to the flux of highest energy cosmic rays in the Milky Way.
You're invited to join us for the @StpDias Statutory Public Lecture 2019 on 23 May 2019, 6pm by Prof. Don Zagier in @tcddublin. Prof. Zaigier will deliver an exciting look at 'Numbers, Knots, & Quantum Theory'. Info and tickets at: bit.ly/2JLsAUj#DIASdiscovers
As part of IQF 2019 on 22 May, Prof. Marika Taylor will explain what #BlackHoles might teach us about #QuantumComputing and conversely, what quantum theory implies about the fundamental properties of black holes. Register at bit.ly/2WuKgHo#DIASdiscovers
The annual Irish Quantum Foundations meeting will take place this year in @tcddublin on 23 & 24 May, bringing together Irish and international theoretical physicists who work fundamental theory and quantum foundations. More info and registration at maths.tcd.ie/~tristan/IQF20….
At last week's final #WhatIsLife lecture, Director of @StpDias Professor Werner Nahm contemplated the impact of Ada Yonath's work for the question 'what is life?' and tying into the impact and legacy of #Schrödinger. #DIASdiscovers
On Thursday, Werner Nahm had us 'thinking outside the box' at the fourth and final @DIAS_Dublin 'What is Life?' lecture series. The series commemorated the 75th anniversary of Erwin #Schrödinger's ground breaking series being published as a book. #DIASdiscovers
If you haven't booked your place at today's lunchtime lecture from the @StpDias, exploring the legacy of Schrödinger’s 'What is Life?' lectures and book, do so now at: bit.ly/2KZStSH It's te final one lecture of the series. #DIASdiscovers
Don't miss the 4th and final lecture in our #WhatisLife series with Prof Werner Nahm, Director of @StpDias, looking at ‘Beyond the ‘What is Life?’ lectures and book’. This lecture, at 1pm tomorrow, will explore the legacy of Professor Erwin Schrödinger. bit.ly/2KZStSH
#DidYouKnow the recent earthquake in Donegal was not the county's first? In fact, they're well used to a tremor or 2.7 in the North West. Read about the county's ground shaking history in The @IrishTimes at: bit.ly/2UTkAHw#DIASdiscovers
#OTD John T. Lewis was born in 1932. Lewis served as Director of @StpDias and was described by @IrishTimes as a 'theoretical physicist who revolutionized telecommunication.' You can read his obituary in the @LondonMathSoc newsletter at: bit.ly/2XeTrvn#DIASdiscovers
DIAS-led team finds evidence that Young Star Clusters make Cosmic Rays
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Last Updated: 17th April 2019 by Niamh Breathnach
Massive stars produced at the collapse of giant molecular clouds, form compact groups and remain tightly linked during their entire life. Acceleration of particles in these objects can be initiated by interacting winds directly in the vicinity of stars or in the so-called superbubbles driven by stellar winds and SN explosions (see Figure).
The conditions in these objects can be more favorable for particle acceleration to PeV energies than in individual SNRs. This makes the clusters of massive young stars an attractive alternative to SNRs as CR factories contributing to the highest energy CRs around the “knee”.
DIAS researchers have led a team to report on a compelling similarity of the energy and radial distributions of multi-TeV protons extracted from observations of gamma-ray from these extended structures surrounding three young star clusters (for detail see https://www.nature.com/articles/s41550-019-0724-0). The derived 1/r decrement of the CR density with the distance from a star cluster is a distinct signature of continuous, over a few million years, cosmic ray injection into the interstellar medium. The hard (E-2.3 type) energy spectra and the required high acceleration efficiency derived from gamma-ray data, point to clusters of young massive stars as promising candidates for cosmic PeVatrons (accelerators boosting the energy of protons up to energy 1 PeV=1015 eV) and dominant contributors to the flux of highest energy cosmic rays in the Milky Way.
Category: Astronomy and Astrophysics Section News & Events, Featured Blog Posts, News
You're invited to join us for the @StpDias Statutory Public Lecture 2019 on 23 May 2019, 6pm by Prof. Don Zagier in @tcddublin. Prof. Zaigier will deliver an exciting look at 'Numbers, Knots, & Quantum Theory'. Info and tickets at: bit.ly/2JLsAUj #DIASdiscovers
As part of IQF 2019 on 22 May, Prof. Marika Taylor will explain what #BlackHoles might teach us about #QuantumComputing and conversely, what quantum theory implies about the fundamental properties of black holes. Register at bit.ly/2WuKgHo #DIASdiscovers
The annual Irish Quantum Foundations meeting will take place this year in @tcddublin on 23 & 24 May, bringing together Irish and international theoretical physicists who work fundamental theory and quantum foundations. More info and registration at maths.tcd.ie/~tristan/IQF20….
At last week's final #WhatIsLife lecture, Director of @StpDias Professor Werner Nahm contemplated the impact of Ada Yonath's work for the question 'what is life?' and tying into the impact and legacy of #Schrödinger. #DIASdiscovers
Martin Möllhoff, Director of Irish National Seismic Network spoke to @OceanFmIreland about yesterday's earthquake in Donegal. You can lsiten back at: oceanfm.ie/2019/04/30/ano… #DIASdiscovers
On Thursday, Werner Nahm had us 'thinking outside the box' at the fourth and final @DIAS_Dublin 'What is Life?' lecture series. The series commemorated the 75th anniversary of Erwin #Schrödinger's ground breaking series being published as a book. #DIASdiscovers
Another Earthquake recorded in Donegal by the Irish National Seismic Network. Magnitude 2.1. You can read more about it at tinyurl.com/y4bewx3h. #DIASdiscovers twitter.com/dias_geophysic…
If you haven't booked your place at today's lunchtime lecture from the @StpDias, exploring the legacy of Schrödinger’s 'What is Life?' lectures and book, do so now at: bit.ly/2KZStSH It's te final one lecture of the series. #DIASdiscovers
Don't miss the 4th and final lecture in our #WhatisLife series with Prof Werner Nahm, Director of @StpDias, looking at ‘Beyond the ‘What is Life?’ lectures and book’. This lecture, at 1pm tomorrow, will explore the legacy of Professor Erwin Schrödinger. bit.ly/2KZStSH
#DidYouKnow the recent earthquake in Donegal was not the county's first? In fact, they're well used to a tremor or 2.7 in the North West. Read about the county's ground shaking history in The @IrishTimes at: bit.ly/2UTkAHw #DIASdiscovers
#OTD John T. Lewis was born in 1932. Lewis served as Director of @StpDias and was described by @IrishTimes as a 'theoretical physicist who revolutionized telecommunication.' You can read his obituary in the @LondonMathSoc newsletter at: bit.ly/2XeTrvn #DIASdiscovers
The @IrishResearch Advanced Laureate Awards are crucial for frontier basic research #LoveIrishResearch #DIASdiscovers twitter.com/IrishResearch/…