WISE 2220−3628
{{Short description|Brown dwarf in the constellation Grus}}
{{Sky|22|20|55.31|-|36|28|17.4|26.4}}
{{Starbox begin
|name=WISE J222055.31−362817.4}}
{{Starbox image
| image = 250px
| caption = WISE 2220-3628
| credit = NASA/ESA/CSA JWST MIRI
}}
{{Starbox observe
|epoch=J2000{{r|Kirkpatrick2012}}
|equinox=J2000{{r|Kirkpatrick2012}}
|constell=Grus
|ra={{RA|22|20|55.31}}{{r|Kirkpatrick2012}}
|dec={{DEC|-36|28|17.4}}{{r|Kirkpatrick2012}}}}
{{Starbox character
|class=Y0{{r|Kirkpatrick2012}}
|appmag_1_passband=J (MKO-NIR filter system)
|appmag_1=20.38 ± 0.17{{r|Kirkpatrick2012}}
|appmag_3_passband=H (MKO-NIR filter system)
|appmag_3=20.81 ± 0.30{{r|Kirkpatrick2012}}
}}
{{Starbox astrometry
| radial_v = {{val|-53.2|2.8}}{{r|Faherty2024}}
| total_v = {{val|55.33|2.82}}{{r|Faherty2024}}
|prop_mo_ra=288.92 ±0.15
|prop_mo_dec=−97.10 ±0.16
|parallax=93.50
|p_error=1.02
}}
{{Starbox detail
| mass_mj = 6-35{{r|Faherty2024}}
| radius_rj = {{val|0.94|0.14}}{{r|Faherty2024}}
| gravity = {{val|4.7|0.5}}{{r|Faherty2024}}
| temperature = {{val|480|41}}{{r|Faherty2024}}
| age_gyr = {{val|4.5|4.0}}{{r|Faherty2024}}
}}
{{Starbox catalog
|names=WISE J222055.31−362817.4,{{r|Kirkpatrick2012}}
WISE 2220−3628{{r|Kirkpatrick2012}}}}
{{Starbox reference
|Simbad=WISE+J222055.31-362817.4
}}
{{Starbox end}}
WISE J222055.31−362817.4 (designation abbreviated to WISE 2220−3628) is a brown dwarf of spectral class Y0,{{r|Kirkpatrick2012}} located in constellation Grus at approximately 34.2 light-years from Earth.{{r|Kirkpatrick23}}
Discovery
WISE 2220−3628 was discovered in 2012 by J. Davy Kirkpatrick et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. In 2012 Kirkpatrick et al. published a paper in The Astrophysical Journal, where they presented discovery of seven new found by WISE brown dwarfs of spectral type Y, among which also was WISE 2220−3628.{{r|Kirkpatrick2012}}
Properties
Y-class dwarfs are among the coldest of all brown dwarfs.{{r|Kirkpatrick2012}} WISE 2220-3628 was observed with JWST and found to be very similar to CWISEP J1935-1546, with the difference of having no signature of an aurora and no temperature inversion in its atmosphere.{{r|Faherty2024}}
Distance
The most accurate distance estimate of WISE 2220−3628 was a trigonometric parallax, published in 2014 by Beichman et al.: 0.136 ± 0.017 arcsec, corresponding to a distance of {{cvt|7.4|±|0.9|pc|ly|lk=on}}.{{r|Beichman2014}} Later the parallax measurement was improved revealing a larger distance of about 34 light years.{{r|Kirkpatrick23}}
==See also==
- List of star systems within 30–35 light-years
- List of Y-dwarfs
- WISE 0146+4234 (Y0)
- WISE 0350−5658 (Y1)
- WISE 0359−5401 (Y0)
- WISE 0535−7500 (≥Y1)
- WISE 0713−2917 (Y0)
- WISE 0734−7157 (Y0)
References
{{reflist|refs=
{{cite journal |author-link=J. Davy Kirkpatrick |last1=Kirkpatrick |first1=J. Davy |last2=Gelino |first2=Christopher R. |last3=Cushing |first3=Michael C. |last4=Mace | first4=Gregory N. |last5=Griffith |first5=Roger L. |last6=Skrutskie |first6=Michael F. |last7=Marsh |first7=Kenneth A. |last8=Wright |first8=Edward L. |last9=Eisenhardt |first9=Peter R. |last10=McLean |first10=Ian S. |last11=Mainzer | first11=Amy K. |last12=Burgasser |first12=Adam J. |last13=Tinney |first13=Chris G. |last14=Parker |first14=Stephen |last15=Salter |first15=Graeme |title=Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function |year=2012 |journal=The Astrophysical Journal |volume=753 |issue=2 |pages=156 |arxiv=1205.2122 |doi=10.1088/0004-637X/753/2/156 |bibcode=2012ApJ...753..156K |s2cid=119279752 }}
{{cite journal|first1=C. |last1=Beichman|first2=Christopher R. |last2=Gelino|first3=J. Davy |last3=Kirkpatrick|first4=Michael C. |last4=Cushing|first5=Sally |last5=Dodson-Robinson|first6=Mark S. |last6=Marley|first7=Caroline V. |last7=Morley|first8=E. L. |last8=Wright|year=2014|title=WISE Y Dwarfs As Probes of the Brown Dwarf-Exoplanet Connection|journal=The Astrophysical Journal|volume=783 |issue=2 |page=68|arxiv=1401.1194v2|bibcode=2014ApJ...783...68B|doi=10.1088/0004-637X/783/2/68|s2cid=119302072 }}
}}
{{Stars of Grus}}
{{DEFAULTSORT:WISE 2220-3628}}