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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.

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

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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