February 26, 2021 Poster Open Access

Greco, Jennifer J.; Cushing, Michael C.

DCAT Export

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        <foaf:name>Greco, Jennifer J.</foaf:name>
        <foaf:givenName>Jennifer J.</foaf:givenName>
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            <foaf:name>Uppsala University/SCAS</foaf:name>
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        <foaf:name>Cushing, Michael C.</foaf:name>
        <foaf:givenName>Michael C.</foaf:givenName>
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            <foaf:name>University of Toledo</foaf:name>
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    <dct:title>A High Resolution H- and K-Band Spectroscopic Sequence of Ultracool Dwarfs</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2021</dct:issued>
    <dcat:keyword>low-mass stars</dcat:keyword>
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    <dct:description>&lt;p&gt;Brown dwarfs are substellar objects too low mass to initiate the hydrogen fusion necessary to be considered stars. Ultracool dwarfs, objects with spectral types of M7 or later,&amp;nbsp;are a mix of low mass stars and brown dwarfs. We have obtained the first high-resolution (R &amp;sim; 45, 000) H- and K-band spectral sequence of ultracool dwarfs with spectral types ranging from M1.5 V to T6, including known low-gravity objects at six spectral types (M9, L0, L1, L2, L3, L5). All spectra were obtained using the Immersion Grating INfrared Spectrometer (IGRINS) at a resolving power of R &amp;sim; 45,000. We compared 22 of our objects to synthetic spectra created from the atmospheric models of Saumon &amp;amp; Marley (2008), to measure specific properties including effective temperature, cloud properties, rotational velocities, and surface gravity.&lt;/p&gt;</dct:description>
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