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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.

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

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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