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GESTATE

testinG massivE STar formATion modEis

Total Cost €

0

EC-Contrib. €

0

Partnership

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 GESTATE project word cloud

Explore the words cloud of the GESTATE project. It provides you a very rough idea of what is the project "GESTATE" about.

20    observations    aided    dense    elegant    chimneys    massive    quantify    theories    gravity    time    astrophysics    thereby    infrared    distinguish    first    mechanisms    significantly    physical    opacity    restricting    thought    expertise    ionised    stable    final    exact    500    polarimetric    radiation    regions    young    halting    gas    mobility    disks    instability    msun    understand    proto    accretion    variability    provides    au    classic    numerical    refinement    structures    astrophysical    theoretical    flows    discriminator    dust    likewise    leader    mass    found    stellar    pressure    adaptive    outward    5000    exerted    core    world    probe    polarimetry    interaction    pulsating    infant    winds    jeans    models    vary    extinction    assisted    host    manifestation    radius    cores    characterise    dusty    seismological    force    magnetic    expanding    bloated    optics    accreting    reversing    heated    vent    mesh    astero    fragmentation    rayleigh    training    subject    taylor    solutions    objects    star    simulations    stars    acquire    he    circumstellar   

Project "GESTATE" data sheet

The following table provides information about the project.

Coordinator
THE UNIVERSITY OF HERTFORDSHIRE HIGHER EDUCATION CORPORATION 

Organization address
address: COLLEGE LANE
city: HATFIELD
postcode: AL10 9AB
website: www.herts.ac.uk

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country United Kingdom [UK]
 Project website http://www.astro.up.pt/
 Total cost 183˙454 €
 EC max contribution 183˙454 € (100%)
 Programme 1. H2020-EU.1.3.2. (Nurturing excellence by means of cross-border and cross-sector mobility)
 Code Call H2020-MSCA-IF-2014
 Funding Scheme MSCA-IF-EF-ST
 Starting year 2015
 Duration (year-month-day) from 2015-05-01   to  2017-04-30

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    THE UNIVERSITY OF HERTFORDSHIRE HIGHER EDUCATION CORPORATION UK (HATFIELD) coordinator 183˙454.00

Map

 Project objective

The classic problem in the formation of high-mass stars is that, for all stars above ~20 Msun, the outward force exerted by the stars radiation on the dusty circumstellar gas should be capable of reversing or halting accretion flows. Core fragmentation, pressure from the expanding ionised gas, magnetic fields and mass loss through stellar winds, all work against the effects of gravity, thereby restricting the final stellar mass. Advances in theoretical models, aided by numerical simulations (e.g. adaptive mesh refinement), have proposed elegant solutions; for example, the interaction between radiation and the dense circumstellar gas is subject to radiation-Rayleigh-Taylor instability, creating low opacity chimneys to vent out the radiation pressure. Likewise, heated cores and disks are stable against Jeans fragmentation. The exact manifestation of these issues and their solutions vary significantly between theories, and the physical structures found around embedded, still accreting massive stars provides a strong discriminator between models. Therefore, this research project aims to better understand the physical conditions of the gas and dust structures within the 500-5000 AU regions of infant high-mass stars by using adaptive-optics-assisted polarimetric observations in the infrared (essential to probe through the high extinction of high-mass cores). Also, we will characterise and quantify, for the first time, the stellar activity, mass, and radius of high-mass (young/proto) stars which are thought to be bloated and pulsating objects. To this end, variability and astero-seismological studies will be conducted. The applicant seeks mobility to a host institute that is a world leader in polarimetry, where he will acquire new expertise in astrophysical polarimetry through training by research. This program will distinguish between and test mechanisms of massive star formation, taking important steps to understand a long standing problem of astrophysics.

 Publications

year authors and title journal last update
List of publications.
2016 M. S. N. Kumar, C. Contreras Peña, P. W. Lucas, M. A. Thompson
HIGHLY VARIABLE YOUNG MASSIVE STARS IN ATLASGAL CLUMPS
published pages: 24, ISSN: 1538-4357, DOI: 10.3847/0004-637X/833/1/24
The Astrophysical Journal 833/1 2019-07-24
2016 C. Contreras Pe?a, P. W. Lucas, D. Minniti, R. Kurtev, W. Stimson, C. Navarro?Molina, J. Borissova, M. S. N. Kumar, M. A. Thompson, T. Gledhill, R. Terzi, D. Froebrich, A. Caratti o Garatti
A population of eruptive variable protostars in VVV
published pages: 3011-3038, ISSN: 0035-8711, DOI: 10.1093/mnras/stw2801
Monthly Notices of the Royal Astronomical Society 465/3 2019-07-24
2016 C. Contreras Peña, P. W. Lucas, R. Kurtev, D. Minniti, A. Caratti o Garatti, F. Marocco, M. A. Thompson, D. Froebrich, M. S. N. Kumar, W. Stimson, C. Navarro Molina, J. Borissova, T. Gledhill, R. Terzi
Infrared spectroscopy of eruptive variable protostars from VVV
published pages: 3039-3100, ISSN: 0035-8711, DOI: 10.1093/mnras/stw2802
Monthly Notices of the Royal Astronomical Society 465/3 2019-07-24
2017 R. Cesaroni, ?. S?nchez-Monge, M. T. Beltr?n, K. G. Johnston, L. T. Maud, L. Moscadelli, J. C. Mottram, A. Ahmadi, V. Allen, H. Beuther, T. Csengeri, S. Etoka, G. A. Fuller, D. Galli, R. Galv?n-Madrid, C. Goddi, T. Henning, M. G. Hoare, P. D. Klaassen, R. Kuiper, M. S. N. Kumar, S. Lumsden, T. Peters, V. M. Rivilla, P. Schilke, L. Testi, F. van der Tak, S. Vig, C. M. Walmsley, H. Zinnecker
Chasing discs around O-type (proto)stars: Evidence from ALMA observations
published pages: A59, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201630184
Astronomy & Astrophysics 602 2019-07-24
2016 M. T. Beltr?n, R. Cesaroni, L. Moscadelli, ?. S?nchez-Monge, T. Hirota, M. S. N. Kumar
Binary system and jet precession and expansion in G35.20?0.74N
published pages: A49, ISSN: 0004-6361, DOI: 10.1051/0004-6361/201628588
Astronomy & Astrophysics 593 2019-07-24

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