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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.

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

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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