View source for LSR J1835+3259

{{Sky|18|35|37.902|+|32|59|54.59|18.553}}
{{Starbox begin
|name=LSR J1835+3259}}
{{Starbox image
| image=[[File:Powerful Auroras Found at Brown Dwarf (19641761103).jpg|320px]]
| caption=Artist's impression of LSR&nbsp;J1835+3259 and its [[aurora|aurorae]].
| credit=Chuck Carter and Gregg Hallinan/[[Caltech]]
}}
{{Starbox observe
|epoch=[[J2000]]<ref name="Simbad">{{cite web
 | url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=2MASS+J18353790%2B3259545
 | title =2MASS J18353790+3259545 -- Brown Dwarf (M<0.08solMass) 
 | publisher=[[Centre de Données astronomiques de Strasbourg]]
 | access-date=2011-10-16}}</ref>
|equinox=[[J2000]]<ref name="Simbad"/>
|constell=[[Lyra]]
|ra={{RA|18|35|37.902}}<ref name="Simbad"/>
|dec={{DEC|+32|59|54.59}}<ref name="Simbad"/>}}
{{Starbox character
|class=M8.5<ref name="Reid2003">
{{cite journal
 | last=Reid |first=I. Neill
  |author2=Cruz
  |author3=Laurie
  |author4=Liebert
  |author5=Dahn
  |author6=Harris
  |author7=Guetter
  |author8=Stone
  |author9=Canzian
  |author10=Luginbuhl
  |author11=Levine
  |author12=Monet
  |author13=Monet
 |title=Meeting the Cool Neighbors. IV. 2MASS 1835+32, a Newly Discovered M8.5 Dwarf within 6 Parsecs of the Sun
 | year=2003
 | journal=[[The Astronomical Journal]]
 | volume=125 |issue=1
 | pages=354–358
 | bibcode=2003AJ....125..354R
 | doi=10.1086/344946
|s2cid=121996230
 |doi-access=free
  }}</ref>
|appmag_1_passband=V <small>([[United States Naval Observatory|USNO]] filter system)</small>
|appmag_1=18.27 ± 0.03<ref name="Reid2003"/>
|appmag_2_passband=I <small>([[United States Naval Observatory|USNO]] filter system)</small>
|appmag_2=13.46 ± 0.02<ref name="Reid2003"/>
|appmag_3_passband=z <small>([[United States Naval Observatory|USNO]] filter system)</small>
|appmag_3=12.63 ± 0.02<ref name="Reid2003"/>
|appmag_4_passband=J <small>([[Two Micron All-Sky Survey|2MASS]] filter system)</small>
|appmag_4=10.27 ± 0.03<ref name="Reid2003"/>
|appmag_5_passband=H <small>([[Two Micron All-Sky Survey|2MASS]] filter system)</small>
|appmag_5=9.58 ± 0.05<ref name="Reid2003"/>
|appmag_6_passband=K<sub>s</sub> <small>([[Two Micron All-Sky Survey|2MASS]] filter system)</small>
|appmag_6=9.15 ± 0.04<ref name="Reid2003"/>
}}
{{Starbox astrometry
|radial_v=-10 ± 40<ref name="Lepine2003">
{{cite journal
 | last=Lepine |first=Sebastien
  |author2=Rich
  |author3=Shara
 | year=2003
 | title=Spectroscopy of New High Proper Motion Stars in the Northern Sky. I. New Nearby Stars, New High-Velocity Stars, and an Enhanced Classification Scheme for M Dwarfs
 | journal=[[The Astronomical Journal]]
 | volume=125 |issue=3
 | pages=1598–1622
 | bibcode=2003AJ....125.1598L
 | doi=10.1086/345972
 | arxiv=astro-ph/0209284
|s2cid=2697331
 }}</ref>
|prop_mo_ra={{val|-72.650|0.047}}<ref name="GaiaEDR3"/>
|prop_mo_dec={{val|-755.146|0.052}}<ref name="GaiaEDR3"/>
|parallax=175.7930
|p_error=0.0468
|parallax_footnote=<ref name="GaiaEDR3">{{Cite Gaia EDR3|2091177593123254016}}</ref>
}}
{{Starbox detail
| mass_mj= 55 ± 4<ref name="Berdyugina et al"/>
| radius_rj= 2.1 ± 0.1<ref name="Berdyugina et al"/>
| luminosity=
| temperature= 2800 ± 30<ref name="Berdyugina et al"/>
| metal=
| rotation= 
| rotational_velocity=
| gravity= 4.5 ± 0.05<ref name="Berdyugina et al"/>
| age_myr= 22 ± 4<ref name="Berdyugina et al"/>
}}
{{Starbox catalog
|names=2MASSI J1835379+325954,<ref name="Reid2003"/> 2MASS 1835+32,<ref name="Reid2003"/> 2MASS J18353790+3259545,<ref name="Simbad"/> LSR 1835+3259,<ref name="Lepine2003"/> 2MUCD 11792,<ref name="Simbad"/> [B2006] J183537.9+325955,<ref name="Simbad"/> LSPM J1835+3259,<ref name="Simbad"/> USNO-B1.0 1229-00376318<ref name="Simbad"/> 
}}
{{Starbox reference
| Simbad = 2MASS+J18353790%2B3259545
}}
{{Starbox image
|image={{Location map|100x100|AlternativeMap=Lyra_constellation_map.svg
|alt=LSR J1835+3259 is located in the constellation Lyra
|caption=Location of LSR J1835+3259 in the constellation [[Lyra]]|border=infobox|mark=Red_pog.png|width=320
|label=LSR&nbsp;J1835+3259
|lat=34.5
|long=63.7
}}|caption=
}}
{{Starbox end}}

'''LSR J1835+3259''' is a nearby [[Ultra-cool dwarf|ultracool dwarf]]<ref name="Saur et al">{{Cite journal|last1=Saur|first1=Joachim|last2=Fischer|first2=Christian|last3=Wennmacher|first3=Alexandre|last4=Feldman|first4=Paul D.|last5=Roth|first5=Lorenz|last6=Strobel|first6=Darrell F.|last7=Reiners|first7=Ansgar|date=May 2018|title=The UV Spectrum of the Ultracool Dwarf LSR J1835+3259 Observed with the Hubble Space Telescope|journal=Astrophysical Journal|language=en|volume=859|issue=1|pages=74|doi=10.3847/1538-4357/aabb55|issn=0004-637X|arxiv=1804.01165|bibcode=2018ApJ...859...74S|s2cid=56408309 |doi-access=free }}</ref> of [[spectral class]] M8.5,<ref name="Reid2003"/> located in constellation [[Lyra]], the discovery of which was published in 2003.<ref name="Reid2003"/><ref name="Lepine2003"/> Previously it was concluded that this star is a young [[brown dwarf]],<ref name="Berdyugina et al">{{Cite journal|last1=Berdyugina|first1=S. V.|last2=Harrington|first2=D. M.|last3=Kuzmychov|first3=O.|last4=Kuhn|first4=J. R.|last5=Hallinan|first5=G.|last6=Kowalski|first6=A. F.|last7=Hawley|first7=S. L.|date=September 2017|title=First Detection of a Strong Magnetic Field on a Bursty Brown Dwarf: Puzzle Solved|journal=Astrophysical Journal|language=en|volume=847|issue=1|pages=61|doi=10.3847/1538-4357/aa866b|arxiv=1709.02861|bibcode=2017ApJ...847...61B|s2cid=118904301|issn=0004-637X |doi-access=free }}</ref> but no [[lithium]] absorption lines are detected for this object, which is a strong indicator for young brown dwarfs that need 10-100 million years to deplete lithium.<ref name="Saur et al" />

==Distance==
Trigonometric [[parallax]] of this object, measured in 2001–2002 with the USNO 61&nbsp;inch (1.5&nbsp;m) reflector under [[United States Naval Observatory|US Naval Observatory (USNO)]] parallax program, is 0.1765 ± 0.0005 [[arcsecond|arcsec]], corresponding to a distance of 5.67 ± 0.02 [[parsec|pc]], or 18.48 ± 0.05 [[light-year|ly]].<ref name="Reid2003"/>

== Characteristics ==
[[File:Fig. 2 Epoch 2 composite image of LSR J1835 + 3259 aurora and quiescent emission.png|left|thumb|Image of LSR 1835+3259 with the High Sensitive Array. Quiescent emission in contours, showing the radio lobes. The right-circularly polarized aurora is the pixelated dark spot in the center.]]
The first potential extrasolar [[auroras]] detected occurred in the atmosphere of LSR J1835+3259. They were found in July 2015 by the [[Karl G. Jansky Very Large Array]] in [[New Mexico]] by analyzing the emitted radio waves. The potential auroras were probably 1 million times brighter than those ever observed on Earth.<ref>{{cite web|url=http://news.discovery.com/space/alien-life-exoplanets/monstrous-aurora-detected-beyond-our-solar-system-150729.htm|title=Monstrous Aurora Detected Beyond our Solar System|last1=O'Neill|first1=Ian|date=July 29, 2015|website=news.discovery.com|publisher=Discovery|access-date=July 29, 2015|archive-date=July 31, 2015|archive-url=https://web.archive.org/web/20150731022645/http://news.discovery.com/space/alien-life-exoplanets/monstrous-aurora-detected-beyond-our-solar-system-150729.htm|url-status=dead}}</ref> The optical emission is mainly red in colour, because the charged particles are interacting with hydrogen in its atmosphere. It is not known what the cause is. Some have speculated that material may be being stripped off the surface of the brown dwarf via stellar winds to produce its own electrons. Another possible explanation is an as-yet-undetected planet or moon around the dwarf, which is throwing off material to light it up, as is the case with [[Jupiter]] and its moon [[Io (moon)|Io]].<ref>{{cite web |url=http://www.space.com/30087-alien-auroras-found-beyond-solar-system.html|title=First Alien Auroras Found, Are 1 Million Times Brighter Than Any On Earth|last1=Q. Choi|first1=Charles|date=July 29, 2015|website=space.com|access-date=July 29, 2015}}</ref> High resolution imaging using the [[High Sensitivity Array]] resolved the quiescent radio emission into two radio lobes, showing that it has a similar structure as [[Magnetosphere of Jupiter|Jupiter radiation belts]]. The radiation belt is seen in three epochs, spanning more than one year. The two lobes are separated by up to 18 ultracool dwarf radii and the right-circularly polarized aurora appears right in the middle of the two lobes.<ref>{{Cite journal |last=Kao |first=Melodie M. |last2=Mioduszewski |first2=Amy J. |last3=Villadsen |first3=Jackie |last4=Shkolnik |first4=Evgenya L. |date=2023-07-01 |title=Resolved imaging confirms a radiation belt around an ultracool dwarf |url=https://ui.adsabs.harvard.edu/abs/2023Natur.619..272K/abstract |journal=Nature |volume=619 |pages=272–275 |arxiv=2302.12841 |bibcode=2023Natur.619..272K |doi=10.1038/s41586-023-06138-w |issn=0028-0836}}</ref>

{{clear|left}}

==References==
{{reflist|colwidth=30em}}
*{{cite journal  |last1=Dittmann |first1=Jason A.  |title=Trigonometric Parallaxes for 1507 Nearby Mid-to-late M Dwarfs  |year=2014  |journal=[[The Astrophysical Journal]]  |volume=784 | issue=2 | pages=156  |arxiv=1312.3241  |doi=10.1088/0004-637X/784/2/156  |bibcode=2014ApJ...784..156D|last2=Irwin  |first2=Jonathan M.  |last3=Charbonneau  |first3=David  |last4=Berta-Thompson  |first4=Zachory K.  |s2cid=18789867 }} [https://www.cfa.harvard.edu/MEarth/MEarth_Parallaxes.txt Table with parallaxes].

==External links==
*[https://web.archive.org/web/20120513202710/http://www.chara.gsu.edu/RECONS/TOP100.posted.htm The 100 Nearest Star Systems (RECONS)]
{{Nearest star systems|4}}
{{Stars of Lyra}}

[[Category:M-type main-sequence stars]]
[[Category:Lyra]]
[[Category:2MASS objects|J18353790+3259545]]