Poster Open Access

Magnetic Braking of Accreting T Tauri Stars: Effects of Mass Accretion Rate, Rotation, and Dipolar Field Strength

Ireland, Lewis G.; Zanni, Claudio; Matt, Sean P.; Pantolmos, George


MARC21 XML Export

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="http://www.loc.gov/MARC21/slim">
  <leader>00000nam##2200000uu#4500</leader>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Camenzind, M. 1990, RvMA, 3, 234</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Bouvier, J., Cabrit, S., Fernandez, M., Martin, E. L., &amp; Matthews, J. M. 1993, A&amp;A, 272, 176</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Edwards, S., Hartigan, P., Ghandour, L., &amp; Andrulis, C. 1994, AJ, 108, 1056</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Edwards, S., Strom, S. E., Hartigan, P., et al. 1993, AJ, 106, 372</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Gullbring, E., Hartmann, L., Briceño, C., &amp; Calvet, N. 1998, ApJ, 492, 323</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Ireland, L. G., Zanni, C., Matt, S. P., &amp; Pantolmos, G. 2020, ApJ, 906(1), 4</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Koenigl, A. 1991, ApJL, 370, L39</subfield>
  </datafield>
  <datafield tag="999" ind1="C" ind2="5">
    <subfield code="x">Rebull, L. M., Wolff, S. C., &amp; Strom, S. E. 2004, AJ, 127, 1029</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Young stars</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Stellar winds</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Stellar evolution</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Stellar magnetic fields</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Stellar rotation</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Magnetohydrodynamical simulations</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Pre-main-sequence stars</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Stellar accretion</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Classical T Tauri stars</subfield>
  </datafield>
  <datafield tag="653" ind1=" " ind2=" ">
    <subfield code="a">Stellar accretion disks</subfield>
  </datafield>
  <controlfield tag="005">20210227002714.0</controlfield>
  <controlfield tag="001">4565111</controlfield>
  <datafield tag="711" ind1=" " ind2=" ">
    <subfield code="d">March 2-4, 2021</subfield>
    <subfield code="g">CS20.5</subfield>
    <subfield code="a">The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun</subfield>
    <subfield code="c">virtually anywhere</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">INAF-Osservatorio Astrofisico di Torino</subfield>
    <subfield code="0">(orcid)0000-0003-0204-8190</subfield>
    <subfield code="a">Zanni, Claudio</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">University of Exeter</subfield>
    <subfield code="0">(orcid)0000-0001-9590-2274</subfield>
    <subfield code="a">Matt, Sean P.</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">Univ. Grenoble Alpes</subfield>
    <subfield code="0">(orcid)0000-0001-7788-3727</subfield>
    <subfield code="a">Pantolmos, George</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="4">edt</subfield>
    <subfield code="a">Wolk, Scott</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="s">7728504</subfield>
    <subfield code="z">md5:35e1b9da7d5fb74ae51021d5b1500373</subfield>
    <subfield code="u">https://zenodo.org/record/4565111/files/2020-03 Cool Stars 20_5 Poster.pdf</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="s">5370423</subfield>
    <subfield code="z">md5:02c15ae5ec43cf00c6f95186166696ac</subfield>
    <subfield code="u">https://zenodo.org/record/4565111/files/2020-03 Cool Stars 20_5 Poster.png</subfield>
  </datafield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="y">Conference website</subfield>
    <subfield code="u">http://coolstars20.cfa.harvard.edu/cs20half/</subfield>
  </datafield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2021-02-26</subfield>
  </datafield>
  <datafield tag="909" ind1="C" ind2="O">
    <subfield code="p">openaire</subfield>
    <subfield code="p">user-coolstars20half</subfield>
    <subfield code="o">oai:zenodo.org:4565111</subfield>
  </datafield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="u">University of Exeter</subfield>
    <subfield code="0">(orcid)0000-0002-8833-1204</subfield>
    <subfield code="a">Ireland, Lewis G.</subfield>
  </datafield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Magnetic Braking of Accreting T Tauri Stars: Effects of Mass Accretion Rate, Rotation, and Dipolar Field Strength</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-coolstars20half</subfield>
  </datafield>
  <datafield tag="536" ind1=" " ind2=" ">
    <subfield code="c">682393</subfield>
    <subfield code="a">Accretion, Winds, and Evolution of Spins and Magnetism of Stars</subfield>
  </datafield>
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="u">https://creativecommons.org/licenses/by/4.0/legalcode</subfield>
    <subfield code="a">Creative Commons Attribution 4.0 International</subfield>
  </datafield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2">opendefinition.org</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">&lt;p&gt;The rotational evolution of an accreting pre-main-sequence star is influenced by its magnetic interaction with its surrounding circumstellar disk. Using the PLUTO code, we perform 2.5D magnetohydrodynamic, axisymmetric, time-dependent simulations of star&amp;ndash;disk interaction&amp;mdash;with an initial dipolar magnetic field structure, and a viscous and resistive accretion disk&amp;mdash;in order to model the three mechanisms that contribute to the net stellar torque: accretion flow, stellar wind, and magnetospheric ejections (periodic inflation and reconnection events). We investigate how changes in the stellar magnetic field strength, rotation rate, and mass accretion rate (changing the initial disk density) affect the net stellar torque. All simulations are in a net spin-up regime. We fit semi-analytic functions for the three stellar torque contributions, allowing for the prediction of the net stellar torque for our parameter regime, as well as the possibility of investigating spin evolution using 1D stellar evolution codes. The presence of an accretion disk appears to increase the efficiency of stellar torques compared to isolated stars, for cases with outflow rates much smaller than accretion rates, because the star&amp;ndash;disk interaction opens more of the stellar magnetic flux compared to that from isolated stars. In our parameter regime, a stellar wind with a mass-loss rate of &amp;asymp;1% of the mass accretion rate is capable of extracting &amp;lt;=50% of the accreting angular momentum. These simulations suggest that achieving spin equilibrium in a representative T Tauri case within our parameter regime, e.g., BP Tau, would require a wind mass-loss rate of &amp;asymp;25% of the mass accretion rate.&lt;/p&gt;</subfield>
  </datafield>
  <datafield tag="773" ind1=" " ind2=" ">
    <subfield code="n">doi</subfield>
    <subfield code="i">isVersionOf</subfield>
    <subfield code="a">10.5281/zenodo.4565110</subfield>
  </datafield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.5281/zenodo.4565111</subfield>
    <subfield code="2">doi</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">poster</subfield>
  </datafield>
</record>
64
84
views
downloads
All versions This version
Views 6464
Downloads 8484
Data volume 649.2 MB649.2 MB
Unique views 6161
Unique downloads 7575

Share

Cite as