View source for Astronomy:YZ Canis Minoris

{{Short description|Star in the constellation Canis Minor}}
{{Sky|07|44|40.17262|+|03|33|08.8778|19.533}}
{{Starbox begin 
 | name = YZ Canis Minoris
}}
{{Starbox image
| image = [[Image:YZCMiLightCurve.png|350px]]
| caption = A [[Astronomy:Light curve|light curve]] for YZ Canis Minoris from ''TESS'' data, adapted from Maehara ''et al.''(2021).<ref name="Maehara"/> The main plot shows both the periodic brightness variation and several flares. The inset plot shows the strongest flare with an expanded time scale.
}}
{{Starbox observe
 | epoch = J2000
 | constell = [[Astronomy:Canis Minor|Canis Minor]]
 | ra = {{RA|07|44|40.17230}}<ref name=GaiaDR3/>
 | dec = {{DEC|+03|33|08.8752}}<ref name=GaiaDR3/>
 | appmag_v = 11.15<ref name=AstudilloDefru2017/>
}}
{{Starbox character
 | type = 
 | class = M5&nbsp;V<ref name=West2015/>
 | b-v = 1.61<ref name=AstudilloDefru2017/>
 | u-b = 
 | variable = 
}}
{{Starbox astrometry
 | radial_v = {{Val|+26.53|0.30}}<ref name=Nidever2002/>
 | prop_mo_ra = −347.782<ref name=GaiaDR3/>
 | prop_mo_dec = −445.702<ref name=GaiaDR3/>
 | parallax = 166.9769
 | p_error = 0.0343
 | parallax_footnote = <ref name=GaiaDR3/>
 | absmag_v = 12.32<ref name=Anderson2012/>
}}
{{Starbox detail
 | mass = 0.308<ref name=Newton2017/>
 | radius = 0.324<ref name=Newton2017/>
 | luminosity = 0.012<ref name=GaiaDR3/>
 | gravity = 5.0<ref name=lepine2013/>
 | temperature = {{Val|3125|61|fmt=commas}}<ref name=Gaidos2014/>
 | metal_fe = {{Val|−0.26|0.08}}<ref name=Gaidos2014/>
 | rotational_velocity = 4.0<ref name=carmenes/>
 | rotation = 2.8<ref name=Newton2017/>&nbsp;days
 | age_myr = 49<ref name=meshkat2017/>
}}
{{Starbox catalog
 | names={{odlist | F=YZ CMI | BD=+35°2496 | HIP=37766 | SAO=63793 | Ross=882 |G=50-4 | G2=112-46 | GJ=285 | LFT=547 | LTT=12064 | LHS=1943 | NLTT=18373 | PM=07421+0341 | LSPM=J0744+0333 | IRAS=07420+0340 | GSC=00183-02190 | PLX=1827 | TYC=183-2190-1 | 2MASS=J07444018+0333089 }}<ref name=SIMBAD/>
}}
{{Starbox reference
 | Simbad = YZ+CMi
}}
{{Starbox image
|image={{Location map|100x100|AlternativeMap=Canis_Minor_constellation_map.svg
|alt=YZ Canis Minoris is located in the constellation Canis Minor
|caption=Location of YZ Canis Minoris in the constellation [[Astronomy:Canis Minor|Canis Minor]]|border=infobox|mark=Red_pog.png|width=350
|label=YZ
|lat=20
|long=36.9
}}|caption=
}}
{{Starbox end}}

'''YZ Canis Minoris''' is a red-hued [[Astronomy:Star|star]] in the equatorial [[Astronomy:Constellation|constellation]] of [[Astronomy:Canis Minor|Canis Minor]]. With an [[Astronomy:Apparent visual magnitude|apparent visual magnitude]] of 11.15,<ref name=AstudilloDefru2017/> it is much too faint to be viewed with the naked eye. The distance to YZ CMi can be estimated from its annual [[Astronomy:Stellar parallax|parallax shift]] of {{Val|167|ul=mas}}, yielding a value of 19.5&nbsp;[[Light year|light year]]s. Presently the star is moving further away with a heliocentric [[Astronomy:Radial velocity|radial velocity]] of +26.5&nbsp;km/s.<ref name=Nidever2002/> It made its closest approach some 162,000 years ago when it made perihelion passage at a distance of {{Convert|3.124|pc|ly|abbr=on|sigfig=3|disp=out}}.<ref name=BailerJones2015/> YZ CMi is a potential member of the [[Astronomy:Beta Pictoris moving group|Beta Pictoris moving group]].<ref name=Nakajima2012/>

This is a [[Astronomy:Red dwarf|red dwarf]] star, or M-type main-sequence star, with a [[Astronomy:Stellar classification|stellar classification]] of M5&nbsp;V.<ref name=West2015/> It is a [[Astronomy:Flare star|flare star]], so called due to its stellar flares being more powerful than those of [[Astronomy:Sun|Earth's star]], and is roughly three times the size of Jupiter.<ref name="First flares"/> The radio emission from the star is in a 50&nbsp;mHz bandwidth and is centered on 1464.9&nbsp;mHz.<ref name="Mirzoyan (Editor)"/> The [[Astronomy:X-ray astronomy|X-ray surface flux]] is {{Val|2.73e6|u=erg s<sup>−1</sup> cm<sup>−2</sup>}}. It has a [[Astronomy:Stellar corona|coronal]] temperature of {{Val|5.79|ul=MK}}.<ref name=Johnstone2015/>

==References==
{{reflist|refs=

<ref name=GaiaDR3>{{Cite Gaia DR3|3136952686035250688}}</ref>

<ref name=SIMBAD>{{cite simbad | title=YZ CMi | access-date=26 August 2018 }}</ref>

<ref name=meshkat2017>{{cite journal
 | title=A Direct Imaging Survey of Spitzer-detected Debris Disks: Occurrence of Giant Planets in Dusty Systems
 | display-authors=1 | last1=Meshkat | first1=Tiffany
 | last2=Mawet | first2=Dimitri | last3=Bryan | first3=Marta L.
 | last4=Hinkley | first4=Sasha | last5=Bowler | first5=Brendan P.
 | last6=Stapelfeldt | first6=Karl R. | last7=Batygin | first7=Konstantin
 | last8=Padgett | first8=Deborah | last9=Morales | first9=Farisa Y.
 | last10=Serabyn | first10=Eugene | last11=Christiaens | first11=Valentin
 | last12=Brandt | first12=Timothy D. | last13=Wahhaj | first13=Zahed
 | journal=The Astronomical Journal
 | volume=154 | issue=6 | id=245 | pages=21 | date=December 2017
 | doi=10.3847/1538-3881/aa8e9a | arxiv=1710.04185 
 | bibcode=2017AJ....154..245M | s2cid=42042014 | doi-access=free }}</ref>

<ref name=carmenes>{{cite journal
 | title=The CARMENES search for exoplanets around M dwarfs. High-resolution optical and near-infrared spectroscopy of 324 survey stars
 | last1=Reiners | first1=Ansgar | last2=Zechmeister | first2=M.
 | last3=Caballero | first3=J. A. | last4=Ribas | first4=I.
 | last5=Morales | first5=J. C. | last6=Jeffers | first6=S. V.
 | last7=Schöfer | first7=P. | last8=Tal-Or | first8=L.
 | last9=Quirrenbach | first9=A. | last10=Amado | first10=P. J.
 | last11=Kaminski | first11=A. | last12=Seifert | first12=W.
 | last13=Abril | first13=M. | last14=Aceituno | first14=J.
 | last15=Alonso-Floriano | first15=F. J. | last16=Ammler-von Eiff | first16=Matthias
 | last17=Antona | first17=R. | last18=Anglada-Escudé | first18=G.
 | last19=Anwand-Heerwart | first19=H. | last20=Arroyo-Torres | first20=B.
 | last21=Azzaro | first21=M. | last22=Baroch | first22=D.
 | last23=Barrado | first23=D. | last24=Bauer | first24=F. F.
 | last25=Becerril | first25=S. | last26=Béjar | first26=V. J. S.
 | last27=Benítez | first27=D. | last28=Berdinas̃ | first28=Z. M.
 | last29=Bergond | first29=G. | last30=Blümcke | first30=M.
 | display-authors=1 | journal=Astronomy and Astrophysics
 | volume=612 | pages=A49 | year=2018
 | arxiv=1711.06576 | doi=10.1051/0004-6361/201732054
 | s2cid=62818673 | bibcode=2018A&A...612A..49R }}</ref>

<ref name="Maehara">{{cite journal |last1=Maehara |first1=Hiroyuki |last2=Notsu |first2=Yuta |last3=Namekata |first3=Kousuke |last4=Honda |first4=Satoshi |last5=Kowalski |first5=Adam F. |last6=Katoh |first6=Noriyuki |last7=Ohshima |first7=Tomohito |last8=Iida |first8=Kota |last9=Oeda |first9=Motoki |last10=Murata |first10=Katsuhiro L. |last11=Yamanaka |first11=Masayuki |last12=Takagi |first12=Kengo |last13=Sasada |first13=Mahito |last14=Akitaya |first14=Hiroshi |last15=Ikuta |first15=Kai |last16=Okamoto |first16=Soshi |last17=Nogami |first17=Daisaku |last18=Shibata |first18=Kazunari |title=Time-resolved spectroscopy and photometry of M dwarf flare star YZ Canis Minoris with OISTER and TESS: Blue asymmetry in the Hα line during the non-white light flare |journal=Publications of the Astronomical Society of Japan |date=February 2021 |volume=73 |issue=1 |pages=44–65 |doi=10.1093/pasj/psaa098 |arxiv=2009.14412 |bibcode=2021PASJ...73...44M }}</ref>

<ref name=Anderson2012>{{cite journal
 | title=XHIP: An extended hipparcos compilation
 | last1=Anderson | first1=E. | last2=Francis | first2=Ch.
 | journal=Astronomy Letters | arxiv=1108.4971
 | volume=38 | issue=5 | pages=331 | year=2012
 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644 }}</ref>

<ref name=AstudilloDefru2017>{{cite journal
 | title=Magnetic activity in the HARPS M dwarf sample. The rotation-activity relationship for very low-mass stars through R'(HK)
 | last1=Astudillo-Defru | first1=N. | last2=Delfosse | first2=X.
 | last3=Bonfils | first3=X. | last4=Forveille | first4=T.
 | last5=Lovis | first5=C. | last6=Rameau | first6=J.
 | journal=Astronomy & Astrophysics | display-authors=1
 | volume=600 | id=A13 | pages=15 | date=April 2017
 | doi=10.1051/0004-6361/201527078 | bibcode=2017A&A...600A..13A | arxiv=1610.09007 | s2cid=119237202 }}</ref>

<ref name="First flares">{{cite journal
 | title=First flares on a distant star
 | journal=New Scientist | date=February 4, 1982 | page=305
 | url=https://books.google.com/books?id=XQwcxTIERmUC&pg=PA305 }}</ref>

<ref name="Mirzoyan (Editor)">{{cite conference
 | title=Flare stars at radio wavelengths
 | last1=Lang | first1=K. R.
 | editor1-last=Mirzoyan | editor1-first=L.V.
 | book-title=Flare Stars in Star Clusters, Associations, and the Solar Vicinity: Proceedings of the 137th Symposium of the International Astronomical Union
 | location=Byurakan (Armenia), U.S.S.R.
 | date=October 23–27, 1989 | publisher=Springer | publication-date=1990
 | isbn=978-0-7923-0771-6 | pages=127–130 }}</ref>

<ref name=Newton2017>{{cite journal
 | title=The Hα Emission of Nearby M Dwarfs and its Relation to Stellar Rotation
 | last1=Newton | first1=Elisabeth R. | last2=Irwin | first2=Jonathan
 | last3=Charbonneau | first3=David | last4=Berlind | first4=Perry
 | last5=Calkins | first5=Michael L. | last6=Mink | first6=Jessica
 | journal=The Astrophysical Journal | display-authors=1
 | volume=834 | issue=1 | id=85 | pages=13 | date=January 2017
 | doi=10.3847/1538-4357/834/1/85  | bibcode=2017ApJ...834...85N | arxiv=1611.03509 | s2cid=55000202 | doi-access=free }}</ref>

<ref name=Nidever2002>{{cite journal
 | display-authors=1 | last1=Nidever | first1=David L.
 | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul
 | last4=Fischer | first4=Debra A. | last5=Vogt | first5=Steven S.
 | title=Radial Velocities for 889 Late-Type Stars
 | journal=The Astrophysical Journal Supplement Series
 | volume=141 | issue=2 | pages=503–522 | date=August 2002
 | doi=10.1086/340570 | bibcode=2002ApJS..141..503N
 | arxiv=astro-ph/0112477 | s2cid=51814894 }}</ref>

<ref name=BailerJones2015>{{cite journal
 | title=Close encounters of the stellar kind 
 | last1=Bailer-Jones | first1=C. A. L.
 | journal=Astronomy & Astrophysics
 | volume=575 | id=A35 | pages=13 | date=March 2015
 | doi=10.1051/0004-6361/201425221 | bibcode=2015A&A...575A..35B
 | arxiv=1412.3648 | s2cid=59039482 }}</ref>

<ref name=Gaidos2014>{{cite journal
 | title=M dwarf metallicities and giant planet occurrence: ironing out uncertainties and systematics
 | last1=Gaidos | first1=Eric | last2=Mann | first2=Andrew W.
 | journal=The Astrophysical Journal | arxiv=1406.4071
 | volume=791 | issue=1 | id=54 | pages=9 | date=August 2014
 | doi=10.1088/0004-637X/791/1/54 | bibcode=2014ApJ...791...54G | s2cid=118744016 }}</ref>

<ref name=lepine2013>{{cite journal
 | title=A Spectroscopic Catalog of the Brightest (J < 9) M Dwarfs in the Northern Sky
 | journal=The Astronomical Journal
 | display-authors=1 | last1=Lépine | first1=Sébastien
 | last2=Hilton | first2=Eric J. | last3=Mann | first3=Andrew W.
 | last4=Wilde | first4=Matthew | last5=Rojas-Ayala | first5=Bárbara
 | last6=Cruz | first6=Kelle L. | last7=Gaidos | first7=Eric
 | volume=145 | issue=4 | pages=102 | year=2013 | arxiv=1206.5991
 | bibcode= 2013AJ....145..102L | doi= 10.1088/0004-6256/145/4/102 | s2cid=117144290
 }}</ref>

<ref name=Johnstone2015>{{citation
 | title=The coronal temperatures of low-mass main-sequence stars 
 | last1=Johnstone | first1=C. P. | last2=Güdel | first2=M. 
 | journal=Astronomy & Astrophysics | arxiv=1505.00643
 | volume=578 | id=A129 | pages=4 | date=June 2015
 | doi=10.1051/0004-6361/201425283 | bibcode=2015A&A...578A.129J | s2cid=117151984 }}</ref>

<ref name=Nakajima2012>{{cite journal
 | last1=Nakajima | first1=Tadashi | last2=Morino | first2=Jun-Ichi
 | title=Potential Members of Stellar Kinematic Groups within 30 pc of the Sun
 | journal=The Astronomical Journal
 | volume=143 | issue=1 | page=2 | date=January 2012
 | doi=10.1088/0004-6256/143/1/2 | bibcode=2012AJ....143....2N | doi-access=free }}</ref>

<ref name=West2015>{{cite journal
 | title=An Activity-Rotation Relationship and Kinematic Analysis of Nearby Mid-to-Late-Type M Dwarfs
 | display-authors=1 | last1=West | first1=Andrew A.
 | last2=Weisenburger | first2=Kolby L. | last3=Irwin | first3=Jonathan
 | last4=Berta-Thompson | first4=Zachory K. | last5=Charbonneau | first5=David
 | last6=Dittmann | first6=Jason | last7=Pineda | first7=J. Sebastian
 | journal=The Astrophysical Journal | arxiv=1509.01590
 | volume=812 | issue=1 | id=3 | pages=12 | date=October 2015
 | doi=10.1088/0004-637X/812/1/3 | bibcode=2015ApJ...812....3W | s2cid=17434970 }}</ref>

}}

{{Nearest star systems|4}}
{{Stars of Canis Minor}}

{{DEFAULTSORT:YZ Canis Minoris}}
[[Category:M-type main-sequence stars]]
[[Category:Flare stars]]
[[Category:Canis Minor]]
[[Category:2MASS objects|J07444018+0333089]]
[[Category:Gliese and GJ objects|0285]]
[[Category:Hipparcos objects|037766]]
[[Category:Objects with variable star designations|Canis Minoris, YZ]]

{{Sourceattribution|YZ Canis Minoris}}