Dr. Christian Schneider
Hamburger Sternwarte
X-rays and the hot side of star formation
Abstract:
The properties of planetary systems are set during the first few Myrs when the host star is still surrounded by its accretion disk. Matter flows through the disk onto the star, which requires powerful winds to remove excess angular momentum. X-ray observations allow us to study precisely these two phenomena. Accretion shocks emit mainly at X-ray wavelengths and the classical accretion tracers merely represent reprocessed X-rays. Similarly, protostellar jets can emit X-rays in their collimation zone, a phenomenon yet unexplained by theories. In this talk, I will present a new model for the accretion shock and a critical view on magnetic launching of protostellar jets inspired by X-ray and UV observations of young stellar systems.
Location: 31 Fitzwilliam Place, D02 XF86
Upcoming seminars:
https://www.dias.ie/2017/10/02/astronomy-and-astrophysics-seminar-schedule-2017/
Leave a Comment
Last Updated: 20th November 2017 by Patrick Kavanagh
2017-11-16, 3pm, Dr. Christian Schneider (Hamburger Sternwarte), X-rays and the hot side of star formation
Dr. Christian Schneider
Hamburger Sternwarte
X-rays and the hot side of star formation
Abstract:
The properties of planetary systems are set during the first few Myrs when the host star is still surrounded by its accretion disk. Matter flows through the disk onto the star, which requires powerful winds to remove excess angular momentum. X-ray observations allow us to study precisely these two phenomena. Accretion shocks emit mainly at X-ray wavelengths and the classical accretion tracers merely represent reprocessed X-rays. Similarly, protostellar jets can emit X-rays in their collimation zone, a phenomenon yet unexplained by theories. In this talk, I will present a new model for the accretion shock and a critical view on magnetic launching of protostellar jets inspired by X-ray and UV observations of young stellar systems.
Location: 31 Fitzwilliam Place, D02 XF86
Upcoming seminars:
https://www.dias.ie/2017/10/02
Category: Astronomy and Astrophysics, Astronomy and Astrophysics Section News & Events, Seminars, Uncategorised
“One might say that the purpose of the scientific schools of the Institute is to play a small but effective part in trying to satisfy man’s insatiable desire to understand how nature works” - J.L. Synge Senior, Professor at @StpDias from 1948–1972 #DIASdiscovers
The DIAS School of Celtic Studies @SCSLibrary trace the development of Celtic languages through a study of its different stages of attestation from earliest times to the spoken languages of today. Tuilleadh eolais ar an scoil le fáil anseo: twitter.com/SCSLibrary #DIASdiscovers
In 2012, we launched the Irish Astronomy Trail, which links all the key astronomy sites on the island of Ireland and is a cross-border initiative with the Armagh Observatory. Find out about the trail here: astronomytrail.ie #DIASdiscovers
When sitting down to dinner on the 25th, spare a thought for the 1st astronauts in space at #Christmas who settled down to hot cocoa, cookies, corn chowder, chicken and gravy. Find out about the first Christmas in space aboard Apollo 8 at ietv.co/2EdRJ7s. #DIASdiscovers
“Astronomy was the cradle of the natural sciences and the starting point of geometrical theories.” Cornelius Lanczos, Senior Prof at the @StpDias from 1954 to 1968.
Professor Sergei Lebedev, lead researcher on the @dias_geophysics Sea-Seis project has just been featured in @siliconrepublic's '22 scientists making the world a better place' list! Great to see Sergei and his work being recognised! #DIASdiscovers twitter.com/siliconrepubli…
Our visiting guest, Professor John McCloskey @EdinburghUni spoke to @NewstalkFM @SeanMoncrieff this afternoon about the unpredictability of volcanoes! Don’t miss his talk tonight - 6.30pm @TCD_physics, organised by @dias_geophysics. Full details: bit.ly/2AqmORP
@AdeODubhghaill You seem to have made a good start!
DIAS is the world’s foremost academic publisher in the field of #CelticStudies. 400 books have been published by our School of Celtic Studies. #DIASdiscovers
At DIAS, our mission is to push the boundaries of current understanding in our specialist disciplines and to conduct fundamental research to the highest international standards. #DIASdiscovers
Don't forget that the "Forecasting the Unpredictable: earthquake science in a crowded world" public lecture is being given tomorrow in @tcddublin by Professor John McCloskey, Chair in Natural Hazards Science at @EdinburghUni. All info at bit.ly/2QphEQJ. #DIASdiscovers
Cornelius Lanczos was a Senior Prof at the @StpDias from 1954 to 1968. #DIASdiscovers
.@petertgallagher, Senior Professor @DIAS_Astronomy has a letter in the @IrishTimes on the distinguished astronomical heritage that Ireland has in our observatories at Dunsink, Armagh and Birr, and the contribution they have made to our country. #DIASdiscovers twitter.com/petertgallaghe…
‘The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists’ – Erwin Schrodinger. Schrodinger was the first Director of Theoretical Physics at DIAS. #DIASdiscovers
At DIAS we contribute to the implementation of a range of national strategies and road maps – Innovation 2020, the National Strategy for Higher Education 2030, the Action Plan for Education and the Global Island policy. We have the future of Ireland at the core of our vision.