UX Arietis

{{Short description|Trinary star system in the constellation Aries}}

{{Starbox begin

| name=UX Arietis

}}

{{Starbox image

| image = 250px

| caption = A visual band light curve for UX Arietis, adapted from Ulvås and Henry (2003)

}}

{{Starbox observe

| epoch=J2000

| ra={{RA|03|26|35.37568}}

| dec={{DEC|+28|42|54.2264}}

| appmag_v=6.35 - 6.71

| constell=Aries

}}

{{Starbox character

| class=G5IV

| r-i =

| v-r =

| b-v = 0.90

| u-b = 0.43

| variable=RS CVn

}}

{{Starbox astrometry

| radial_v=+26.53

| prop_mo_ra=+46.794

| prop_mo_dec=−102.876

| parallax=19.7836

| p_error=0.1264

| parallax_footnote=

| absmag_v=2.91

}}

{{Starbox orbit

| reference =

| primary=Aa

| name=Ab

| period_unitless = {{Val|6.437888|0.000007|u=d}}

| axis_unitless = {{Val|1.750|0.01|ul=mas}}

| eccentricity = 0 (fixed)

| inclination = {{Val|125.0|0.5}}

| node = {{Val|113.4|0.4}}

| periastron = {{nowrap|2456238.134 ± 0.002 HJD}}

| periarg = 90 (fixed)

}}

{{Starbox orbit

| reference =

| primary=A

| name=B

| period = 111.02

| axis_unitless = {{val|648.0|0.8|ul=mas}}

| eccentricity = {{val|0.77|0.01}}

| inclination = {{Val|93.3|0.6}}

| node = {{Val|58.9|0.5}}

| periastron = {{val|2451664.9|34.3|ul=HJD}}

| periarg = {{val|274.9|0.8}}

}}

{{Starbox detail

| source =

| component1 = UX Ari Aa

| mass = {{Val|1.30|0.06}}

| radius = {{Val|5.6|0.1}}

| luminosity = {{Val|9.3|0.7}}

| gravity = {{Val|3.06|0.04}}

| temperature = {{Val|4560|100|fmt=commas}}

| metal=

| rotation=6.44 d

| age=

| component2 = UX Ari Ab

| mass2 = {{Val|1.14|0.06}}

| radius2 = {{Val|1.6|0.2}}

| temperature2 = {{Val|5670|100|fmt=commas}}

| luminosity2 = {{Val|2.34|0.28}}

| gravity2 = {{Val|4.09|0.16}}

}}

{{Starbox detail|no_heading=y

| component1 = UX Ari B

| mass = 0.75

| radius = {{val|0.8|0.1}}

| luminosity = {{Val|0.38|0.08}}

| gravity = {{Val|4.51|0.13}}

| temperature = {{Val|4930|100|fmt=commas}}

| metal=

| rotation=

| age=

}}

{{Starbox catalog

| names=BD+28°532, CCDM 03266+2843, HD 21242, HIP 16042, SAO 75927

}}

{{Starbox reference

| Simbad=HD+21242

| ARICNS =00304

}}

UX Arietis is a triple star system located in the northern zodiacal constellation of Aries. Based upon parallax measurements from the Gaia satellite, it is roughly 165 light years away. The star varies in brightness from magnitude 6.35 to 6.71, meaning it may be intermittently visible to the unaided eye under ideal dark-sky conditions.

In 1972, Robert E. Montle and Douglas S. Hall discovered that the star's brightness varies. It was given its variable star designation in 1973. The primary, component Aa, is the variable star, of the RS CVn type. The variability of the star is believed due to a combination of cool star spots and warm flares, set against the baseline quiescent temperature of the stellar atmosphere. The variability appears to be cyclical with a period of 8−9 years.

A more distant companion, component C, shares a common proper motion and is at the same distance. It is another cool dwarf star with an estimated spectral class of K2. Any orbit is estimated to require over 100,000 years.

References

{{reflist|refs=

{{cite journal |last1=Kukarkin |first1=B. V. |last2=Kholopov |first2=P. N. |last3=Kukarkina |first3=N. P. |last4=Perova |first4=N. B. |title=59th Name-List of Variable Stars |journal=Information Bulletin on Variable Stars |date=October 1973 |volume=834 |page=1 |bibcode=1973IBVS..834....1K |url=https://ibvs.konkoly.hu/pub/ibvs/0801/0834.pdf |access-date=28 November 2024}}

{{cite journal |last1=Montle |first1=R. E. |last2=Hall |first2=D. S. |title=HD 21242: a New Bright Variable Star |journal=Information Bulletin on Variable Stars |date=March 1972 |volume=646 |page=1 |bibcode=1972IBVS..646....1M |url=https://ibvs.konkoly.hu/pub/ibvs/0601/0646.pdf |access-date=28 November 2024}}

{{Cite journal|last=Tokovinin|first=Andrei|date=2018-03-01|title=The Updated Multiple Star Catalog|journal=The Astrophysical Journal Supplement Series|volume=235|issue=1|pages=6|doi=10.3847/1538-4365/aaa1a5|issn=0067-0049|arxiv=1712.04750|bibcode=2018ApJS..235....6T|s2cid=119047709 |doi-access=free }}

{{cite web |title=UX Ari |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=3719 |website=The International Variable Star Index |publisher=AAVSO |access-date=28 October 2021}}

{{cite journal| bibcode=2011ApJ...737..104P | title=Radio Astrometry of the Triple Systems Algol and UX Arietis | last1=Peterson | first1=W. M. | last2=Mutel | first2=R. L. | last3=Lestrade | first3=J. -F. | last4=Güdel | first4=M. | last5=Goss | first5=W. M. | journal=The Astrophysical Journal | year=2011 | volume=737 | issue=2 | page=104 | doi=10.1088/0004-637X/737/2/104 | arxiv=1104.5005 | s2cid=119229905 }}

{{cite journal | last1 = Anderson | first1 = E. | last2 = Francis | first2 = Ch. | title = XHIP: An extended hipparcos compilation | journal = Astronomy Letters | date = May 2012 | volume = 38 | issue = 5 | pages = 331–346 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 119257644 }}

{{cite journal |last1=Ulvås |first1=V. Aarum |last2=Henry |first2=G. W. |title=BV photometry of UX Ari in the period 1987–2002 |journal=Astronomy & Astrophysics |date=May 2003 |volume=402 |issue=3 |pages=1033–1041 |doi=10.1051/0004-6361:20030304 |bibcode=2003A&A...402.1033A |doi-access=free }}

{{cite journal |doi=10.1111/j.1365-2966.2004.07588.x

| title=Kinematics of chromospherically active binaries and evidence of an orbital period decrease in binary evolution | journal=Monthly Notices of the Royal Astronomical Society

| volume=349 | issue=3 | pages=1069–1092

| bibcode=2004MNRAS.349.1069K |arxiv = astro-ph/0404219 | last1=Karataș

| first1=Yüksel

| last2=Bilir |first2=Selçuk

| last3=Eker |first3=Zeki

| last4=Demircan |first4=Osman

| last5=Liebert |first5=James

| last6=Hawley |first6=Suzanne L.

| last7=Fraser |first7=Oliver J.

| last8=Covey |first8=Kevin R.

| last9=Lowrance |first9=Patrick

| last10=Kirkpatrick |first10=J. Davy

| last11=Burgasser |first11=Adam J.

| year=2004

| doi-access=free | s2cid=15290475

}}

{{cite journal

| last1=Strassmeier | first1=Klaus G.

| title=Starspots

| journal=The Astronomy and Astrophysics Review

| volume=17 | issue=3 | pages=251–308

| date=September 2009

| doi=10.1007/s00159-009-0020-6

| bibcode=2009A&ARv..17..251S

| doi-access=free}}

{{cite journal

| last1=Guetter | first1=H. H.

| last2=Hewitt | first2=A. V.

| title=Photoelectric UBV photometry for 317 PZT and VZT stars

| journal=Publications of the Astronomical Society of the Pacific

| volume=96 | pages=441–443

| date=June 1984

| doi=10.1086/131362

| bibcode=1984PASP...96..441G

| doi-access=free}}

{{cite journal

| last1=Alekseev | first1=I. Yu.

| title=Three-Component Model of Spottedness in the Classical RS CVn System UX Ari

| journal=Astrophysics

| volume=57 | issue=3 | pages=344–351

| date=September 2014

| doi=10.1007/s10511-014-9339-4

| bibcode=2014Ap.....57..344A

| s2cid=119963417 }}

{{cite journal

| title=Orbital Elements and Stellar Parameters of the Active Binary UX Arietis

| display-authors=1 | last1=Hummel | first1=C. A.

| last2=Monnier | first2=J. D. | last3=Roettenbacher | first3=R. M.

| last4=Torres | first4=G. | last5=Henry | first5=G. W.

| last6=Korhonen | first6=H. | last7=Beasley | first7=A.

| last8=Schaefer | first8=G. H. | last9=Turner | first9=N. H.

| last10=Ten Brummelaar | first10=T. | last11=Farrington | first11=C. D.

| last12=Sturmann | first12=J. | last13=Sturmann | first13=L.

| last14=Baron | first14=F. | last15=Kraus | first15=S.

| journal=The Astrophysical Journal

| doi=10.3847/1538-4357/aa7b87 | bibcode=2017ApJ...844..115H | hdl=10871/32318 | s2cid=43383613 | hdl-access=free | doi-access=free }}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HIP%2016042 HIP 16042]
[http://aladin.u-strasbg.fr/AladinPreview?-c=03+26+35.3889%2B28+42+54.315&ident=V*+UX+Ari&submit=Aladin+previewer Image HD 21242]
[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HIP%2016042 HIP 16042]

Category:Aries (constellation)

Category:G-type subgiants

Category:Triple stars

021242

Category:Spectroscopic binaries

016042

Category:RS Canum Venaticorum variables

Arietis, UX

Category:Durchmusterung objects

Category:TIC objects

UX Arietis

References

Further reading

External links