February 26, 2021 Poster Open Access

Greco, Jennifer J.; Cushing, Michael C.

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    "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>", 
    "language": "eng", 
    "title": "A High Resolution H- and K-Band Spectroscopic Sequence of Ultracool Dwarfs", 
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    "references": [
      "Cushing, M. C., Marley, M. S., Saumon, D., et al. 2008, Ap. J., 678, 1372", 
      "Filippazzo, J. C., Rice, E. L., Faherty, J., et al. 2015, Ap. J., 810, 158", 
      "Saumon, D., & Marley, M. S. 2008, Ap. J., 689, 1327"
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      "low-mass stars", 
      "substellar objects", 
      "ultracool dwarfs", 
      "spectroscopy", 
      "near-infrared spectroscopy"
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    "publication_date": "2021-02-26", 
    "creators": [
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        "orcid": "0000-0002-4649-1568", 
        "affiliation": "Uppsala University/SCAS", 
        "name": "Greco, Jennifer J."
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        "orcid": "0000-0001-7780-3352", 
        "affiliation": "University of Toledo", 
        "name": "Cushing, Michael C."
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    "meeting": {
      "acronym": "CS20.5", 
      "url": "http://coolstars20.cfa.harvard.edu/cs20half", 
      "dates": "March 2-4, 2021", 
      "place": "virtual", 
      "title": "The 20.5th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun"
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