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• W4297493275 endingPage "165" @default.
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• W4297493275 abstract "Abstract We present the characterization of the low-gravity M6 dwarf 2MASS J06195260-2903592, previously identified as an unusual field object based on its strong IR excess and variable near-IR spectrum. Multiple epochs of low-resolution ( R ≈ 150) near-IR spectra show large-amplitude (≈0.1–0.5 mag) continuum variations on timescales of days to 12 yr, unlike the small-amplitude variability typical for field ultracool dwarfs. The variations between epochs are well-modeled as changes in the relative extinction (Δ A V ≈ 2 mag). Similarly, Panoramic Survey Telescope and Rapid Response System 1 optical photometry varies on timescales as long as 11 yr (and possibly as short as an hour) and implies comparable A V changes. Near Earth Object Wide-field Infrared Survey Explorer mid-IR light curves also suggest changes on 6 month timescales, with amplitudes consistent with the optical/near-IR extinction variations. However, near-IR spectra, near-IR photometry, and optical photometry obtained in the past year indicate that the source can also be stable on hourly and monthly timescales. From comparison to objects of similar spectral type, the total extinction of 2MASS J0619-2903 seems to be A V ≈ 4–6 mag, with perhaps epochs of lower extinction. Gaia Early Data Release 3 (EDR3) finds that 2MASS J0619-2903 has a wide-separation (1.′2 = 10,450 au) stellar companion, with an isochronal age of <?CDATA ${31}_{-10}^{+22}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msubsup> <mml:mrow> <mml:mn>31</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>10</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>22</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> Myr and a mass of <?CDATA ${0.30}_{-0.03}^{+0.04}$?> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML overflow=scroll> <mml:msubsup> <mml:mrow> <mml:mn>0.30</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>−</mml:mo> <mml:mn>0.03</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>0.04</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> M ☉ . Adopting this companion’s age and EDR3 distance (145.2 ± 0.6 pc), we estimate a mass of 0.11–0.17 M ☉ for 2MASS J0619-2903. Altogether, 2MASS J0619-2903 appears to possess an unusually long-lived primordial circumstellar disk, perhaps making it a more obscured analog to the “Peter Pan” disks found around a few M dwarfs in nearby young moving groups." @default.
• W4297493275 created "2022-09-29" @default.
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• W4297493275 date "2022-09-28" @default.
• W4297493275 modified "2023-10-01" @default.
• W4297493275 title "On the Unusual Variability of 2MASS J06195260–2903592: A Long-lived Disk around a Young Ultracool Dwarf" @default.
• W4297493275 cites W147232447 @default.
• W4297493275 cites W1575766262 @default.
• W4297493275 cites W1896773212 @default.
• W4297493275 cites W1909652296 @default.
• W4297493275 cites W1972726488 @default.
• W4297493275 cites W1974618482 @default.
• W4297493275 cites W1981001851 @default.
• W4297493275 cites W1983968691 @default.
• W4297493275 cites W1983993499 @default.
• W4297493275 cites W1986316936 @default.
• W4297493275 cites W1986781091 @default.
• W4297493275 cites W1998795526 @default.
• W4297493275 cites W2022907109 @default.
• W4297493275 cites W2024913339 @default.
• W4297493275 cites W2028581342 @default.
• W4297493275 cites W2030663701 @default.
• W4297493275 cites W2034817948 @default.
• W4297493275 cites W2036899871 @default.
• W4297493275 cites W2051997064 @default.
• W4297493275 cites W2052937506 @default.
• W4297493275 cites W2063634237 @default.
• W4297493275 cites W2063988638 @default.
• W4297493275 cites W2065500942 @default.
• W4297493275 cites W2067756552 @default.
• W4297493275 cites W2068131127 @default.
• W4297493275 cites W2070376619 @default.
• W4297493275 cites W2076029332 @default.
• W4297493275 cites W2077265829 @default.
• W4297493275 cites W2084973544 @default.
• W4297493275 cites W2091411196 @default.
• W4297493275 cites W2109697614 @default.
• W4297493275 cites W2111817932 @default.
• W4297493275 cites W2120546577 @default.
• W4297493275 cites W2128350470 @default.
• W4297493275 cites W2146047103 @default.
• W4297493275 cites W2160235206 @default.
• W4297493275 cites W2163548424 @default.
• W4297493275 cites W2178336115 @default.
• W4297493275 cites W2261573924 @default.
• W4297493275 cites W2531657066 @default.
• W4297493275 cites W2556178409 @default.
• W4297493275 cites W2562216415 @default.
• W4297493275 cites W2563065802 @default.
• W4297493275 cites W2563730060 @default.
• W4297493275 cites W2590741408 @default.
• W4297493275 cites W2594445930 @default.
• W4297493275 cites W2614866025 @default.
• W4297493275 cites W2780156044 @default.
• W4297493275 cites W2785375817 @default.
• W4297493275 cites W2791653656 @default.
• W4297493275 cites W2792305537 @default.
• W4297493275 cites W2900843458 @default.
• W4297493275 cites W2901288453 @default.
• W4297493275 cites W3000009186 @default.
• W4297493275 cites W3008959707 @default.
• W4297493275 cites W3022804827 @default.
• W4297493275 cites W3035611213 @default.
• W4297493275 cites W3098028933 @default.
• W4297493275 cites W3098435190 @default.
• W4297493275 cites W3099099553 @default.
• W4297493275 cites W3099280882 @default.
• W4297493275 cites W3099936740 @default.
• W4297493275 cites W3100181858 @default.
• W4297493275 cites W3100460881 @default.
• W4297493275 cites W3100901876 @default.
• W4297493275 cites W3100939720 @default.
• W4297493275 cites W3101595827 @default.
• W4297493275 cites W3101599443 @default.
• W4297493275 cites W3101845186 @default.
• W4297493275 cites W3101977552 @default.
• W4297493275 cites W3102175194 @default.
• W4297493275 cites W3102312332 @default.
• W4297493275 cites W3102552291 @default.
• W4297493275 cites W3103621093 @default.
• W4297493275 cites W3103675263 @default.
• W4297493275 cites W3103895524 @default.
• W4297493275 cites W3103956510 @default.
• W4297493275 cites W3104134027 @default.
• W4297493275 cites W3104345614 @default.

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