Dr. N. Cunningham
IRAM, France
Infall and Outflow Motions towards a Sample of Massive Star Forming Regions
Abstract:
Infall and outflow motions are an imperative part of the star formation process. However, we currently lack a clear understanding of how they change with evolutionary stage and how infall and outflow motions influence the formation process. I will present results of a distance limited outflow and infall survey undertaken with the JCMT towards a sample of 31 MYSOs and ultra-compact HII (UCHII) regions drawn from the RMS survey (Cunningham et al. 2018). Where, the presence of young, active outflows is identified from the SiO (8-7) emission and previous CO (3-2) data (Maud et al. 2015b) are used to determine outflow properties. The infall motions and bulk properties of each region are determined from the HCO+/H13CO+ (4-3) emission. Active outflows are detected towards approximately 50% of our sample compared with <10% of the sources displaying infall signatures. I will discuss the differences found towards massive star forming hosting active outflows compared with those hosting potentially fossil, momentum outflows. In addition, I will show a comparison of the JCMT results, which trace larger
spatial scales, with previous high spatial resolution SMA observations for a sub-sample of these regions (Cunningham et al. 2016). Finally, I will present some recent Green Bank Telescope observations of HCO+/H13CO+ (1-0) taken with the new instrument, Argus (~9" resolution), towards a sub-set of these regions. These new observations allow us to explore and trace kinematics on cloud scales down to core type scales at a resolution of <0.1pc, providing a valuable comparison between the infall kinematics traced by HCO+ (4-3) and HCO+ (1-0) in these regions.
Location: 31 Fitzwilliam Place, Dublin 2
Upcoming seminars:
https://www.dias.ie/2018/03/07/astronomy-and-astrophysics-seminar-schedule-2018/
Leave a Comment
Posted: 17th July 2018 by Rebeca Garcia
2018-07-18, 15:00, Dr. N. Cunningham (IRAM, France), Infall and Outflow Motions towards a Sample of Massive Star Forming Regions
Dr. N. Cunningham
IRAM, France
Infall and Outflow Motions towards a Sample of Massive Star Forming Regions
Abstract:
Infall and outflow motions are an imperative part of the star formation process. However, we currently lack a clear understanding of how they change with evolutionary stage and how infall and outflow motions influence the formation process. I will present results of a distance limited outflow and infall survey undertaken with the JCMT towards a sample of 31 MYSOs and ultra-compact HII (UCHII) regions drawn from the RMS survey (Cunningham et al. 2018). Where, the presence of young, active outflows is identified from the SiO (8-7) emission and previous CO (3-2) data (Maud et al. 2015b) are used to determine outflow properties. The infall motions and bulk properties of each region are determined from the HCO+/H13CO+ (4-3) emission. Active outflows are detected towards approximately 50% of our sample compared with <10% of the sources displaying infall signatures. I will discuss the differences found towards massive star forming hosting active outflows compared with those hosting potentially fossil, momentum outflows. In addition, I will show a comparison of the JCMT results, which trace larger spatial scales, with previous high spatial resolution SMA observations for a sub-sample of these regions (Cunningham et al. 2016). Finally, I will present some recent Green Bank Telescope observations of HCO+/H13CO+ (1-0) taken with the new instrument, Argus (~9" resolution), towards a sub-set of these regions. These new observations allow us to explore and trace kinematics on cloud scales down to core type scales at a resolution of <0.1pc, providing a valuable comparison between the infall kinematics traced by HCO+ (4-3) and HCO+ (1-0) in these regions.
Location: 31 Fitzwilliam Place, Dublin 2
Upcoming seminars:
https://www.dias.ie/2018/03/07
Category: Seminars
Happy Birthday! twitter.com/thecelticist/s…
The papers were 1) Affine Field Theory: conservation identitites and relation to Weyl and Eddington 2)The Union of the three fundamental fields (Gravitation, Menson, Electromagnetism) Which went on to secure worldwide acclaim. #DIASdiscovers
Date: 01 December 1943 Paper: The Irish Press Headline: Two Papers by Dr. Schroedinger Synopsis: 1943 was a busy year for Schroedinger. Not only did he deliver the "What is Life?" Lectures in @tcddublin in February in November he delivered two papers in the @RIAdawson (1/2)
Available to buy on the DIAS bookshop: books.dias.ie/index.php?main… (5/5) #DIASdiscovers #celtic #studies #twopatricks
"In the lives of St. Patrick, the two saints are invariably fused into one", said Prof. O'Rahilly in his lecture. The lecture was a condensation from O’Rahilly’s book “The two Patricks: a lecture on the history of Christianity in fifth-century Ireland”. (4/5)
He was known by his first name Patricius, which in later times would lead to confusion as he was succeeded by another apostle of the same name (Saint Patrick or Patricius in Latin). (3/5)
He spoke on "Palladius and Patrick". Palladius was the first bishop of the Christians of Ireland. (2/5)
Date: 21st March 1942 Paper: The Irish Press Headline: Palladius and Patrick | School Of Celtic Studies Lecture Synopsis: The first public lecture under the auspices of the School of Celtic Studies was delivered in Trinity College by Professor T. F. O'Rahilly in 1942. (1/5)
As part of our ongoing participation in the @HistFest we decided to take a look into the Irish Newspaper Archives and see where DIAS made it into print over the last 80 years. There were so many articles, the hardest part was selecting what we would post. We hope you enjoy!
@AReillyFailte @CultureNight @VisitDublin Thanks Antoinette! Glad you enjoyed 😊
Big thank you to @MartinaPQuinn of @helloalicepr for moderating the discussion, and of course to our panel @NeasaMcG @CormacORafferty and @laoneill111
@CormacORafferty "to cut yourself off from fundamental research means you could miss out on some of the biggest ideas"
@laoneill "it's our job as researchers to keep reminding governments how important basic research is" "For Dev basic research being carried out in Ireland was a badge of pride"
@NeasaMcG Schrödinger's work in causality was not well received by the religious authorities at the time At the same time DIAS did have Catholic priests working on research projects in the early days, so there was not the conflict you might think between science and religion
@laoneill111 Schrödinger was very popular in social circles in Dublin, a bit of a renaissance man
@CormacORafferty Schrödinger was gifted at explaining difficult concepts
@CormacORafferty on how unsuccessful work, in Schrödinger's case, unified field theory, is just as important part of science. And no one has managed to crack it yet! And not forgetting the cat
@laoneill111 how Schrödinger's book inspired scientists to change fields and result in the finding of the double helix.