First Observations of the Brown Dwarf HD 19467 B with JWST
We observed HD 19467 B with JWST’s NIRCam in six filters spanning 2.5–4.6 μ m with the long-wavelength bar coronagraph. The brown dwarf HD 19467 B was initially identified through a long-period trend in the radial velocity of the G3V star HD 19467. HD 19467 B was subsequently detected via coronagrap...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acb68b |
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| author | Alexandra Z. Greenbaum Jorge Llop-Sayson Ben W.P. Lew Geoffrey Bryden Thomas L. Roellig Marie Ygouf B. J. Fulton Daniel R. Hey Daniel Huber Sagnick Mukherjee Michael Meyer Jarron Leisenring Marcia Rieke Martha Boyer Joseph J. Green Doug Kelly Karl Misselt Eugene Serabyn John Stansberry Laurie E. U. Chu Matthew De Furio Doug Johnstone Joshua E. Schlieder Charles Beichman |
| author_facet | Alexandra Z. Greenbaum Jorge Llop-Sayson Ben W.P. Lew Geoffrey Bryden Thomas L. Roellig Marie Ygouf B. J. Fulton Daniel R. Hey Daniel Huber Sagnick Mukherjee Michael Meyer Jarron Leisenring Marcia Rieke Martha Boyer Joseph J. Green Doug Kelly Karl Misselt Eugene Serabyn John Stansberry Laurie E. U. Chu Matthew De Furio Doug Johnstone Joshua E. Schlieder Charles Beichman |
| author_sort | Alexandra Z. Greenbaum |
| collection | DOAJ |
| description | We observed HD 19467 B with JWST’s NIRCam in six filters spanning 2.5–4.6 μ m with the long-wavelength bar coronagraph. The brown dwarf HD 19467 B was initially identified through a long-period trend in the radial velocity of the G3V star HD 19467. HD 19467 B was subsequently detected via coronagraphic imaging and spectroscopy, and characterized as a late-T type brown dwarf with an approximate temperature ∼1000 K. We observed HD 19467 B as a part of the NIRCam GTO science program, demonstrating the first use of the NIRCam Long Wavelength Bar coronagraphic mask. The object was detected in all six filters (contrast levels of 2 × 10 ^−4 to 2 × 10 ^−5 ) at a separation of 1.″6 using angular differential imaging and synthetic reference differential imaging. Due to a guide star failure during the acquisition of a preselected reference star, no reference star data were available for post-processing. However, reference differential imaging was successfully applied using synthetic point-spread functions developed from contemporaneous maps of the telescope’s optical configuration. Additional radial velocity data (from Keck/HIRES) are used to constrain the orbit of HD 19467 B. Photometric data from TESS are used to constrain the properties of the host star, particularly its age. NIRCam photometry, spectra, and photometry from the literature, and improved stellar parameters are used in conjunction with recent spectral and evolutionary substellar models to derive the physical properties of HD 19467 B. Using an age of 9.4 ± 0.9 Gyr inferred from spectroscopy, Gaia astrometry, and TESS asteroseismology, we obtain a model-derived mass of 62 ± 1 M _J , which is consistent within 2 σ with the dynamically derived mass of ${81}_{-12}^{+14}$ M _J . |
| first_indexed | 2024-03-12T04:36:10Z |
| format | Article |
| id | doaj.art-85bce911d3be497c86dbc65501076cd5 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2025-03-20T02:00:17Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj.art-85bce911d3be497c86dbc65501076cd52024-10-03T14:32:41ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01945212610.3847/1538-4357/acb68bFirst Observations of the Brown Dwarf HD 19467 B with JWSTAlexandra Z. Greenbaum0https://orcid.org/0000-0002-7162-8036Jorge Llop-Sayson1https://orcid.org/0000-0002-3414-784XBen W.P. Lew2https://orcid.org/0000-0003-1487-6452Geoffrey Bryden3https://orcid.org/0000-0001-5966-837XThomas L. Roellig4Marie Ygouf5https://orcid.org/0000-0001-7591-2731B. J. Fulton6https://orcid.org/0000-0003-3504-5316Daniel R. Hey7https://orcid.org/0000-0003-3244-5357Daniel Huber8https://orcid.org/0000-0001-8832-4488Sagnick Mukherjee9https://orcid.org/0000-0003-1622-1302Michael Meyer10https://orcid.org/0000-0003-1227-3084Jarron Leisenring11https://orcid.org/0000-0002-0834-6140Marcia Rieke12https://orcid.org/0000-0002-7893-6170Martha Boyer13https://orcid.org/0000-0003-4850-9589Joseph J. Green14Doug Kelly15Karl Misselt16Eugene Serabyn17John Stansberry18Laurie E. U. Chu19https://orcid.org/0000-0002-1437-4463Matthew De Furio20https://orcid.org/0000-0003-1863-4960Doug Johnstone21https://orcid.org/0000-0002-6773-459XJoshua E. Schlieder22Charles Beichman23https://orcid.org/0000-0002-5627-5471IPAC , California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA, 91125, USA ; azg@ipac.caltech.eduDepartment of Astronomy, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA, 91125, USANASA Ames Research Center , Mountain View, CA, 94035, USA; Bay Area Environmental Research Institute , P.O. Box 25, Moffett Field, CA, 94035, USAJet Propulsion Laboratory, California Institute of Technology , Pasadena, CA, 91109, USANASA Ames Research Center , Mountain View, CA, 94035, USAJet Propulsion Laboratory, California Institute of Technology , Pasadena, CA, 91109, USANASA Exoplanet Science Institute , Caltech-IPAC, 1200 E. California Boulevard, Pasadena, CA, 91125, USAInstitute for Astronomy, University of Hawai‘i, 2680 Woodlawn Drive , Honolulu, HI, 96822, USAInstitute for Astronomy, University of Hawai‘i, 2680 Woodlawn Drive , Honolulu, HI, 96822, USADepartment of Astronomy and Astrophysics, University of California , Santa Cruz, CA, 95064, USADepartment of Astronomy, University of Michigan , Ann Arbor, MI, 48109, USASteward Observatory, University of Arizona , Tucson, AZ, 85721, USASteward Observatory, University of Arizona , Tucson, AZ, 85721, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD, 21218, USAJet Propulsion Laboratory, California Institute of Technology , Pasadena, CA, 91109, USASteward Observatory, University of Arizona , Tucson, AZ, 85721, USASteward Observatory, University of Arizona , Tucson, AZ, 85721, USAJet Propulsion Laboratory, California Institute of Technology , Pasadena, CA, 91109, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD, 21218, USANASA Postdoctoral Program Fellow, NASA Ames Research Center , M/S 245-1, Moffett Field, CA, 94035, USADepartment of Astronomy, University of Michigan , Ann Arbor, MI, 48109, USANRC Herzberg Astronomy and Astrophysics , 5071 West Saanich Road, Victoria, BC, V9E 2E7, Canada; Department of Physics and Astronomy, University of Victoria , Victoria, BC, V8P 5C2, CanadaExoplanets and Stellar Astrophysics Laboratory, NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD, USAJet Propulsion Laboratory, California Institute of Technology , Pasadena, CA, 91109, USA; NASA Exoplanet Science Institute , Caltech-IPAC, 1200 E. California Boulevard, Pasadena, CA, 91125, USAWe observed HD 19467 B with JWST’s NIRCam in six filters spanning 2.5–4.6 μ m with the long-wavelength bar coronagraph. The brown dwarf HD 19467 B was initially identified through a long-period trend in the radial velocity of the G3V star HD 19467. HD 19467 B was subsequently detected via coronagraphic imaging and spectroscopy, and characterized as a late-T type brown dwarf with an approximate temperature ∼1000 K. We observed HD 19467 B as a part of the NIRCam GTO science program, demonstrating the first use of the NIRCam Long Wavelength Bar coronagraphic mask. The object was detected in all six filters (contrast levels of 2 × 10 ^−4 to 2 × 10 ^−5 ) at a separation of 1.″6 using angular differential imaging and synthetic reference differential imaging. Due to a guide star failure during the acquisition of a preselected reference star, no reference star data were available for post-processing. However, reference differential imaging was successfully applied using synthetic point-spread functions developed from contemporaneous maps of the telescope’s optical configuration. Additional radial velocity data (from Keck/HIRES) are used to constrain the orbit of HD 19467 B. Photometric data from TESS are used to constrain the properties of the host star, particularly its age. NIRCam photometry, spectra, and photometry from the literature, and improved stellar parameters are used in conjunction with recent spectral and evolutionary substellar models to derive the physical properties of HD 19467 B. Using an age of 9.4 ± 0.9 Gyr inferred from spectroscopy, Gaia astrometry, and TESS asteroseismology, we obtain a model-derived mass of 62 ± 1 M _J , which is consistent within 2 σ with the dynamically derived mass of ${81}_{-12}^{+14}$ M _J .https://doi.org/10.3847/1538-4357/acb68bBrown dwarfsCoronagraphic imagingHigh contrast techniques |
| spellingShingle | Alexandra Z. Greenbaum Jorge Llop-Sayson Ben W.P. Lew Geoffrey Bryden Thomas L. Roellig Marie Ygouf B. J. Fulton Daniel R. Hey Daniel Huber Sagnick Mukherjee Michael Meyer Jarron Leisenring Marcia Rieke Martha Boyer Joseph J. Green Doug Kelly Karl Misselt Eugene Serabyn John Stansberry Laurie E. U. Chu Matthew De Furio Doug Johnstone Joshua E. Schlieder Charles Beichman First Observations of the Brown Dwarf HD 19467 B with JWST The Astrophysical Journal Brown dwarfs Coronagraphic imaging High contrast techniques |
| title | First Observations of the Brown Dwarf HD 19467 B with JWST |
| title_full | First Observations of the Brown Dwarf HD 19467 B with JWST |
| title_fullStr | First Observations of the Brown Dwarf HD 19467 B with JWST |
| title_full_unstemmed | First Observations of the Brown Dwarf HD 19467 B with JWST |
| title_short | First Observations of the Brown Dwarf HD 19467 B with JWST |
| title_sort | first observations of the brown dwarf hd 19467 b with jwst |
| topic | Brown dwarfs Coronagraphic imaging High contrast techniques |
| url | https://doi.org/10.3847/1538-4357/acb68b |
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