Gliese 526

{{short description|Star in the constellation Boötes}} {{Sky|13|45|43.77665|+|14|53|29.4635|17.726}} {{Starbox begin}} {{Starbox image |image={{Location map|100x100|AlternativeMap=Celestial_map_Boo.svg |alt=Gliese 526 is located in the constellation Boötes |caption=Location of Gliese 526 in the constellation [[Boötes]]|border=infobox|mark=Red_pog.png|width=300 |label=<br/>Gliese 526 |position=left |lat=18.9 |long=86 }}|caption= }} {{Starbox observe | epoch = J2000 | constell = [[Boötes]]<ref name=xhip/> | ra = {{RA|13|45|43.776}}<ref name=GaiaDR3/> | dec = {{DEC|+14|53|29.47}}<ref name=GaiaDR3/> | appmag_v = 8.464<ref name="MNRAS407_3_1657"/> }} {{Starbox character | class = M1.5 V<ref name=aaa508_3_1313/> | b-v = +1.48<ref name=aj72_1334/> | u-b = +1.04<ref name=aj72_1334/> | variable = [[Flare star]]<ref name=aaas139_555/> }} {{Starbox astrometry | radial_v = {{val|+15.58|0.12}}<ref name=GaiaDR3/> | prop_mo_ra = {{val|+1776.006|fmt=commas}} | prop_mo_dec = {{val|−1455.156|fmt=commas}} | pm_footnote = <ref name=GaiaDR3/> | parallax = 183.9962 | p_error = 0.0253 | parallax_footnote = <ref name=GaiaDR3/> | absmag_v = +9.80<ref name=xhip/> }} {{Starbox detail | component1 = | mass = {{val|0.472|0.02}}<ref name=Schweitzer/> | radius = {{val|0.488|0.008}}<ref name=Schweitzer/> | gravity = {{val|4.79|0.07}}<ref name=Schweitzer/> | luminosity = {{val|3.651|0.127|e=-2}}<ref name=Schweitzer/> | temperature = {{val|3678|51|fmt=commas}}<ref name=Schweitzer/> | age_gyr = | metal_fe = –0.086<ref name="MNRAS407_3_1657"/> | rotational_velocity = 1.00<ref name="MNRAS407_3_1657"/> | rotation = {{Val|48.7|0.3}}<ref name=Stefanov2025/> days }} {{Starbox catalog | names = {{odlist | LAL=25372 | BD=+15°2620 | CD=+15°2620 | HD=119850 | HIP=67155 | PLX=3135 | SAO=100695 | TYC=899-789-1 | Wolf=498 }}<ref name="SIMBAD"/> }} {{Starbox reference | Simbad=HD+119850 }} {{Starbox end}}

'''GJ 526''' ('''Lalande 25372''', '''Wolf 498''') is a [[red dwarf]] star in the northern [[constellation]] of [[Boötes]]. It has an [[apparent visual magnitude]] of 8.5,<ref name="MNRAS407_3_1657"/> which is too faint to be seen with the naked eye. Based upon an annual [[parallax]] shift of 0.184 [[arcseconds]] as measured by the [[Hipparcos]] satellite, this system is {{Convert|5.43|pc|ly|abbr=off|lk=on|disp=flip}} from [[Earth]].{{r|Gatewood2008}}

==History of observations== This star is known at least from 1801, when it was included to [[Jérôme Lalande|Lalande]]'s stellar catalogue ''[[Histoire céleste française]]''.<ref name="Lalande1801"/> In 1847 edition of Lalande's catalogue by [[Francis Baily]] it was assigned number 25372, since it sometimes designated as ''Lalande 25372'' or ''LAL 25372''.<ref name="Baily1847"/>

High proper motion of this star and its large parallax were known at least from 1911, when [[Frank Schlesinger]] published a paper where he announced its parallax {{val|152|7|ul=mas}} and mentioned its proper motion value of 2.3 arcseconds.{{r|Schlesinger1911}} In 1919, German astronomer [[Max Wolf]] included GJ 526 in his catalogue of high-[[proper-motion]] stars, giving it the identifier 498.<ref name=wolf1919/>

==Properties== [[File:GL526LightCurve.png|thumb|left|A [[light curve]] for Gliese 526, plotted from data published by Bruno ''et al.'' (2024)<ref name="Bruno"/>]] GJ 526 is a [[flare star]], which means it undergoes sporadic increases in brightness of up to 1–6 magnitudes.<ref name=aaas139_555/> It is a [[main-sequence]] [[red dwarf]] with a [[stellar classification]] of M1.5 V.<ref name=aaa508_3_1313/> GJ 526 is smaller than the [[Sun]], with 47% of the [[Solar mass|mass]] and 49% of the [[Solar radius|radius]]. It shines with just 3.6% of the [[luminosity of the Sun]], with its [[stellar atmosphere]] radiating at an [[effective temperature]] of 3,678 K.<ref name=Schweitzer/>

GJ 526 has been examined for an [[infrared excess|excess of radiation]] in the [[Infrared astronomy|infrared]]. The presence of an infrared excess can be taken as an indication of a [[debris disk]] orbiting the star. However, no such excess was discovered around GJ 526.<ref name=aaa548_A105/> {{clear left}} ==References== {{Reflist|refs=

<ref name="Bruno">{{cite journal | last1=Bruno | first1=G. | last2=Pagano | first2=I. | last3=Scandariato | first3=G. | last4=Florén | first4=H. G. | last5=Brandeker | first5=A. | last6=Olofsson | first6=G. | last7=Maxted | first7=P. F. L. | last8=Fortier | first8=A. | last9=Sousa | first9=S. G. | last10=Sulis | first10=S. | last11=Van Grootel | first11=V. | last12=Garai | first12=Z. | last13=Boldog | first13=A. | last14=Kriskovics | first14=L. | last15=Szabó | first15=Gy. M. | last16=Gandolfi | first16=D. | last17=Alibert | first17=Y. | last18=Alonso | first18=R. | last19=Bárczy | first19=T. | last20=Barrado Navascues | first20=D. | last21=Barros | first21=S. C. C. | last22=Baumjohann | first22=W. | last23=Beck | first23=M. | last24=Beck | first24=T. | last25=Benz | first25=W. | last26=Billot | first26=N. | last27=Borsato | first27=L. | last28=Broeg | first28=C. | last29=Collier Cameron | first29=A. | last30=Csizmadia | first30=Sz. | last31=Cubillos | first31=P. E. | last32=Davies | first32=M. B. | last33=Deleuil | first33=M. | last34=Deline | first34=A. | last35=Delrez | first35=L. | last36=Demangeon | first36=O. D. J. | last37=Demory | first37=B. O. | last38=Ehrenreich | first38=D. | last39=Erikson | first39=A. | last40=Farinato | first40=J. | last41=Fossati | first41=L. | last42=Fridlund | first42=M. | last43=Gillon | first43=M. | last44=Güdel | first44=M. | last45=Günther | first45=M. N. | last46=Heitzmann | first46=A. | last47=Helling | first47=Ch. | last48=Hoyer | first48=S. | last49=Isaak | first49=K. G. | last50=Kiss | first50=L. L. | last51=Lam | first51=K. W. F. | last52=Laskar | first52=J. | last53=Lecavelier des Etangs | first53=A. | last54=Lendl | first54=M. | last55=Magrin | first55=D. | last56=Mordasini | first56=C. | last57=Nascimbeni | first57=V. | last58=Ottensamer | first58=R. | last59=Pallé | first59=E. | last60=Peter | first60=G. | last61=Piotto | first61=G. | last62=Pollacco | first62=D. | last63=Queloz | first63=D. | last64=Ragazzoni | first64=R. | last65=Rando | first65=N. | last66=Ratti | first66=F. | last67=Rauer | first67=H. | last68=Ribas | first68=I. | last69=Santos | first69=N. C. | last70=Sarajlic | first70=M. | last71=Ségransan | first71=D. | last72=Simon | first72=A. E. | last73=Singh | first73=V. | last74=Smith | first74=A. M. S. | last75=Stalport | first75=M. | last76=Thomas | first76=N. | last77=Udry | first77=S. | last78=Ulmer | first78=B. | last79=Venturini | first79=J. | last80=Villaver | first80=E. | last81=Walton | first81=N. A. | last82=Wilson | first82=T. G. | title=Detailed cool star flare morphology with CHEOPS and TESS |journal=Astronomy & Astrophysics | date=June 2024 | volume=686 | page=A239 | doi=10.1051/0004-6361/202348951 | arxiv=2403.17065 | bibcode=2024A&A...686A.239B | hdl=20.500.11850/680366|author-link63=Didier Queloz}}</ref>

<ref name="MNRAS407_3_1657">{{citation | title=Observation and modelling of main-sequence star chromospheres - XVI. Rotation of dK5 stars | last=Houdebine | first=E. R. | journal=[[Monthly Notices of the Royal Astronomical Society]] | volume=407 | issue=3 | pages=1657–1673 | date=September 2011 | bibcode=2011MNRAS.416.2233H | doi=10.1111/j.1365-2966.2011.19199.x | postscript=. | doi-access= free}}</ref>

<ref name=Schweitzer>{{Cite journal |last1=Schweitzer |first1=Andreas |last2=Passegger |first2=V. M. |last3=Cifuentes |first3=C. |last4=Bejar |first4=V. J. S. |last5=Cortes-Contreras |first5=M. |last6=Caballero |first6=J. A. |last7=del Burgo |first7=C. |last8=Czesla |first8=S. |last9=Kuerster |first9=M. |last10=Montes |first10=D. |last11=Osorio |first11=M. R. Zapatero |last12=Ribas |first12=I. |last13=Reiners |first13=A. |last14=Quirrenbach |first14=A. |last15=Amado |first15=P. J. |date=May 2019 |title=The CARMENES search for exoplanets around M dwarfs: Different roads to radii and masses of the target stars |arxiv=1904.03231 |journal=Astronomy & Astrophysics |volume=625 |pages=A68 |doi=10.1051/0004-6361/201834965 |bibcode=2019A&A...625A..68S |issn=0004-6361}}</ref>

<ref name=aaa508_3_1313>{{citation | last1=Frasca | first1=A. | last2=Covino | first2=E. | last3=Spezzi | first3=L. | last4=Alcalá | first4=J. M. | last5=Marilli | first5=E. | last6=Fżrész | first6=G. | last7=Gandolfi | first7=D. | title=REM near-IR and optical photometric monitoring of pre-main sequence stars in Orion. Rotation periods and starspot parameters | journal=Astronomy and Astrophysics | volume=508 | issue=3 | pages=1313–1330 | date=December 2009 | doi=10.1051/0004-6361/200913327 | bibcode=2009A&A...508.1313F | postscript=. | arxiv=0911.0760| s2cid=118361131 }}</ref>

<ref name=aj72_1334>{{citation | last1=Cowley | first1=A. P. | last2=Hiltner | first2=W. A. | last3=Witt | first3=A. N. | title=Spectral classification and photometry of high proper motion stars | journal=[[Astronomical Journal]] | volume=72 | pages=1334–1340 | date=December 1967 | doi=10.1086/110413 | bibcode=1967AJ.....72.1334C | postscript=. | doi-access=free }}</ref>

<ref name=aaas139_555>{{citation | last1=Gershberg | first1=R. E. | last2=Katsova | first2=M. M. | last3=Lovkaya | first3=M. N. | last4=Terebizh | first4=A. V. | last5=Shakhovskaya | first5=N. I. | title=Catalogue and bibliography of the UV Cet-type flare stars and related objects in the solar vicinity | journal=Astronomy and Astrophysics Supplement | volume=139 | issue=3 | pages=555–558 | date=November 1999 | doi=10.1051/aas:1999407 | bibcode=1999A&AS..139..555G | postscript=. | doi-access=free}}</ref>

<ref name=aaa548_A105>{{citation | last1=Avenhaus | first1=H. | last2=Schmid | first2=H. M. | last3=Meyer | first3=M. R. | title=The nearby population of M-dwarfs with WISE: a search for warm circumstellar dust | journal=Astronomy & Astrophysics | volume=548 | page=A105 | arxiv=1209.0678 | date=December 2012 | doi=10.1051/0004-6361/201219783 | bibcode=2012A&A...548A.105A | s2cid=56397054 | postscript=. }}</ref>

<ref name="SIMBAD">{{cite simbad | title=HD 119850 | access-date=2014-01-11 }}</ref>

<ref name="Schlesinger1911">{{citation | postscript=. |last=Schlesinger |first=F.| author-link=Frank Schlesinger | title=Photographic determinations of stellar parallax made with the Yerkes refractor. V. | year=1911 | volume=33 | pages=353–374 | journal=[[The Astrophysical Journal]] | doi=10.1086/141859 | bibcode=1911ApJ....33..353S | doi-access=free }}</ref>

<ref name="Lalande1801">[[Jérôme Lalande|Lalande, Joseph Jérôme Le Français de]] (1801). "[[Histoire céleste française]]". Paris, Imprimerie de la République. [[Google Books]] id: [https://books.google.com/books?id=f9AMAAAAYAAJ f9AMAAAAYAAJ]. Page with GJ 526: [http://google.com/books?id=f9AMAAAAYAAJ&pg=PT106#v=onepage&q&f=false 74]</ref>

<ref name="Baily1847">{{cite book |last1=Baily |first1=F. |last2=Lalande |first2=J. |title=Catalogue of those stars in the Histoire Celeste Francaise of Jerome Delalande, for which tables of reduction to the epoch 1800 have been published by Prof. Schumacher. |date=1847 |bibcode=1847cshc.book.....B |author-link2=Jérôme Lalande|author-link=Francis Baily}}. [[Google Books]] id: [https://books.google.com/books?id=oc0-AAAAcAAJ oc0-AAAAcAAJ]. Page with GJ 526: [http://google.com/books?id=oc0-AAAAcAAJ&pg=PA635#v=onepage&q&f=false 635].</ref>

<ref name="Gatewood2008">{{cite journal |last=Gatewood |first=George |title=Astrometric Studies of Aldebaran, Arcturus, Vega, the Hyades, and Other Regions |year=2008 |journal=[[The Astronomical Journal]] |volume=136 | issue=1 | pages=452–460 |doi=10.1088/0004-6256/136/1/452 |bibcode=2008AJ....136..452G|doi-access=free }}</ref>

<ref name="wolf1919">{{citation | last=Wolf | first=M. | title=Katalog von 1053 staerker bewegten Fixsternen | journal=Veroeffentlichungen der Badischen Sternwarte zu Heidelberg | date=1919 | volume=7 | issue=10 | pages=195–219 | language=de | bibcode=1919VeHei...7..195W | postscript=. |author-link=Max Wolf}}</ref>

<ref name=Stefanov2025>{{cite arXiv |last1=Stefanov |first1=A. K. |last2=Hernández |first2=J. I. González |last3=Mascareño |first3=A. Suárez |last4=Rebolo |first4=R. |last5=Nari |first5=N. |last6=Mestre |first6=J. M. |last7=Sousa |first7=S. G. |last8=Tabernero |first8=H. M. |last9=Osorio |first9=M.-R. Zapatero |title=Stellar-activity analysis of the nearby M dwarf GJ 526. Multi-dimensional Gaussian-process modelling of RV, FWHM and S-index |date=2025-09-03 |eprint=2509.03276 |class=astro-ph.SR |mode=cs2 |postscript=.}}</ref>

}}

==Notes== {{reflist|group=nb}}

[[Category:Boötes]] [[Category:Gliese and GJ objects|0526]] [[Category:M-type main-sequence stars]] [[Category:Henry Draper Catalogue objects|119850]] [[Category:Flare stars]] [[Category:Durchmusterung objects|BD+15 2620]] [[Category:Hipparcos objects|067155]] [[Category:Wolf objects|0498]] [[Category:Population I stars]]