Poster Open Access

The Multiple-component Binary Hyad, vA 351

G. Fritz Benedict; Otto Franz; Elliot Horch; Guillermo Torres; L. Prato


MARC21 XML Export

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="http://www.loc.gov/MARC21/slim">
  <leader>00000nam##2200000uu#4500</leader>
  <controlfield tag="005">20210301155731.0</controlfield>
  <datafield tag="500" ind1=" " ind2=" ">
    <subfield code="a">Paper submitted to Astronomical Journal</subfield>
  </datafield>
  <controlfield tag="001">4560663</controlfield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">Lowell Observatory</subfield>
    <subfield code="a">Otto Franz</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">Southern Connecticut State University</subfield>
    <subfield code="a">Elliot Horch</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">Harvard Smithsonian</subfield>
    <subfield code="a">Guillermo Torres</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="u">Lowell Observatory</subfield>
    <subfield code="a">L. Prato</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="s">3336134</subfield>
    <subfield code="z">md5:3587b5ba511322906327948f061fafbb</subfield>
    <subfield code="u">https://zenodo.org/record/4560663/files/CS20.5_Poster36x36v1sm.pdf</subfield>
  </datafield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  </datafield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2021-02-24</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:4560663</subfield>
  </datafield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="u">McDonald Observatory</subfield>
    <subfield code="a">G. Fritz Benedict</subfield>
  </datafield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">The Multiple-component Binary Hyad, vA 351</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-coolstars20half</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;We extend results first announced by Franz et al. (1998), that identified vA351 = H346 in the Hyades as a multiple star system containing a white dwarf. With Hubble Space Telescope Fine Guidance Sensor fringe tracking and scanning, and more recent speckle observations, all spanning 20.7 years, we establish a parallax, relative orbit, and mass fraction for two components, with a period,&amp;nbsp;P&amp;nbsp;= 2.70y and total mass 2.1M⊙. With ground-based radial velocities, we find that component B consists of BC, two M dwarf stars orbiting with a very short period (PBC&amp;nbsp;= 0.749 days), having a mass ratio&amp;nbsp;MC/MB=0.95. We confirm that the total mass of the system can only be reconciled with the distance and component photometry by including a fainter, higher mass component. The quadruple system consists of three M dwarfs (A,B,C) and one white dwarf (D);&amp;nbsp;MA=0.57M⊙,&amp;nbsp;MB=0.48M⊙, and&amp;nbsp;MC=0.45M⊙. The WD mass, 0.53M⊙, comes from cooling models, an assumed Hyades age of 670My, and consistency with all previous and derived astrometric, photometric, and RV results. Velocities from H&amp;alpha;&amp;nbsp;and He&amp;nbsp;I&amp;nbsp;emission lines confirm the BC&amp;nbsp;period derived from absorption lines, with similar (HeI) and higher (H&amp;alpha;) velocity amplitudes. We ascribe the larger H&amp;alpha;&amp;nbsp;amplitude to emission from a region each component shadows from the other, depending on the line of sight.&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.4560662</subfield>
  </datafield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.5281/zenodo.4560663</subfield>
    <subfield code="2">doi</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">poster</subfield>
  </datafield>
</record>
47
49
views
downloads
All versions This version
Views 4747
Downloads 4949
Data volume 163.5 MB163.5 MB
Unique views 4343
Unique downloads 4646

Share

Cite as