February 26, 2021 Poster Open Access

Greco, Jennifer J.; Cushing, Michael C.

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  <dc:creator>Greco, Jennifer J.</dc:creator>
  <dc:creator>Cushing, Michael C.</dc:creator>
  <dc:date>2021-02-26</dc:date>
  <dc:description>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, are a mix of low mass stars and brown dwarfs. We have obtained the first high-resolution (R ∼ 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 ∼ 45,000. We compared 22 of our objects to synthetic spectra created from the atmospheric models of Saumon &amp; Marley (2008), to measure specific properties including effective temperature, cloud properties, rotational velocities, and surface gravity.</dc:description>
  <dc:identifier>https://zenodo.org/record/4564681</dc:identifier>
  <dc:identifier>10.5281/zenodo.4564681</dc:identifier>
  <dc:identifier>oai:zenodo.org:4564681</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>doi:10.5281/zenodo.4564680</dc:relation>
  <dc:relation>url:https://zenodo.org/communities/coolstars20half</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>https://creativecommons.org/licenses/by/4.0/legalcode</dc:rights>
  <dc:subject>low-mass stars</dc:subject>
  <dc:subject>substellar objects</dc:subject>
  <dc:subject>ultracool dwarfs</dc:subject>
  <dc:subject>spectroscopy</dc:subject>
  <dc:subject>near-infrared spectroscopy</dc:subject>
  <dc:title>A High Resolution H- and K-Band Spectroscopic Sequence of Ultracool Dwarfs</dc:title>
  <dc:type>info:eu-repo/semantics/conferencePoster</dc:type>
  <dc:type>poster</dc:type>
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