Poster Open Access

A High Resolution H- and K-Band Spectroscopic Sequence of Ultracool Dwarfs

Greco, Jennifer J.; Cushing, Michael C.

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  "inLanguage": {
    "alternateName": "eng", 
    "@type": "Language", 
    "name": "English"
  "description": "<p>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,&nbsp;are a mix of low mass stars and brown dwarfs. We have obtained the first high-resolution (R &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 &sim; 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.</p>", 
  "license": "", 
  "creator": [
      "affiliation": "Uppsala University/SCAS", 
      "@id": "", 
      "@type": "Person", 
      "name": "Greco, Jennifer J."
      "affiliation": "University of Toledo", 
      "@id": "", 
      "@type": "Person", 
      "name": "Cushing, Michael C."
  "url": "", 
  "datePublished": "2021-02-26", 
  "@type": "CreativeWork", 
  "keywords": [
    "low-mass stars", 
    "substellar objects", 
    "ultracool dwarfs", 
    "near-infrared spectroscopy"
  "@context": "", 
  "identifier": "", 
  "@id": "", 
  "workFeatured": {
    "url": "", 
    "alternateName": "CS20.5", 
    "location": "virtual", 
    "@type": "Event", 
    "name": "The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun"
  "name": "A High Resolution H- and K-Band Spectroscopic Sequence of Ultracool Dwarfs"
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