15 Arietis

{{Short description|Single, variable star in the constellation Aries}}

{{Starbox begin

| name = 15 Arietis

}}

{{Starbox image

| image = 250px

| caption = A visual band light curve for 15 Arietis, plotted from data presented by Tabur et al. (2009)

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|02|10|37.59642}}

| dec = {{DEC|+19|30|01.2099}}

| appmag_v = 5.67 - 5.74

| constell = Aries

}}

{{Starbox character

| class = M3 III

| r-i =

| v-r =

| b-v = +1.64

| u-b = +1.91

| variable = SRs

}}

{{Starbox astrometry

| radial_v = {{nowrap|+62.04 ± 0.22}}

| prop_mo_ra = +87.88

| prop_mo_dec = -27.82

| parallax = 5.84

| p_error = 0.49

| parallax_footnote =

| absmag_v = −0.9

}}

{{Starbox detail

| mass = 1.4

| radius = 87

| luminosity = 781

| temperature = 3,565

| metal_fe =

| rotational_velocity =

| age_myr =

}}

{{Starbox catalog

| names = AV Arietis, BD+18°277, FK5 1056, HD 13325, HIP 10155, HR 631, SAO 92822

}}

{{Starbox reference

| Simbad = 15+Arietis

}}

15 Arietis (abbreviated 15 Ari) is a single variable star in the northern constellation of Aries. 15 Arietis is the Flamsteed designation; it also bears the variable star designation AV Arietis. It has an apparent visual magnitude of 5.74, which is just bright enough to be visible to the naked eye from dark suburban skies. An annual parallax shift of 5.84 mas corresponds to a physical distance of approximately {{Convert|560|ly|pc|abbr=off|lk=on}} from Earth. At that distance, the star's brightness is reduced by 0.33 in magnitude because of extinction from interstellar gas and dust.

This is a red giant star with a stellar classification of M3 III. The measured angular diameter of this star is {{nowrap|3.67 ± 0.11 mas}}. At its estimated distance, this yields a physical size of about 67 times the radius of the Sun. The radius determined from the observed brightness and colour of the star is {{solar radius|87}}.

15 Arietis is a short period semiregular variable with the designation AV Arietis. The period given in the General Catalogue of Variable Stars is 5.032 days. Longterm photometry finds that the strongest pulsation period is 18.1 days with an amplitude of 0.028 magnitudes, while a second is 21.9 days and 0.030 in magnitude.

References

{{reflist|refs=

{{cite journal|bibcode= 2012MNRAS.427..343M|title= Fundamental parameters and infrared excesses of Hipparcos stars|journal= Monthly Notices of the Royal Astronomical Society|volume= 427|pages= 343–357|last1= McDonald|first1= I.|last2= Zijlstra|first2= A. A.|last3= Boyer|first3= M. L.|year= 2012|issue= 1|doi= 10.1111/j.1365-2966.2012.21873.x|doi-access= free|arxiv = 1208.2037 |s2cid= 118665352}}

{{citation | first=F. | last=van Leeuwen |date=November 2007 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 | postscript=. }}

{{citation | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | issue=1 | pages=165–186 |date=January 2005 | doi=10.1051/0004-6361:20041272 | bibcode=2005A&A...430..165F | arxiv=astro-ph/0409579 | s2cid=17804304 | postscript=. }}

{{citation | display-authors=1 | last1=Tabur | first1=V. | last2=Bedding | first2=T. R. | last3=Kiss | first3=L. L. | last4=Moon | first4=T. T. | last5=Szeidl | first5=B. | last6=Kjeldsen | first6=H. | title=Long-term photometry and periods for 261 nearby pulsating M giants | journal=Monthly Notices of the Royal Astronomical Society | volume=400 | issue=4 | pages=1945–1961 | doi=10.1111/j.1365-2966.2009.15588.x | bibcode=2009MNRAS.400.1945T | postscript=. |arxiv = 0908.3228 |date=December 2009| doi-access=free | s2cid=15358380 }}

{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. |date=September 2008| doi-access=free | s2cid=14878976 }}

{{citation | last1=Richichi | first1=A. | last2=Percheron | first2=I. | last3=Khristoforova | first3=M. | title=CHARM2: An updated Catalog of High Angular Resolution Measurements | journal=Astronomy and Astrophysics | volume=431 | issue=2 | pages=773–777 | doi=10.1051/0004-6361:20042039 | bibcode=2005A&A...431..773R | postscript=. |date=February 2005| doi-access=free }}

{{citation | first1=Kenneth R. | last1=Lang | title=Astrophysical formulae | volume=1 | series=Astronomy and astrophysics library | edition=3rd | publisher=Birkhäuser | date=2006 | isbn=3-540-29692-1 | url=https://books.google.com/books?id=OvTjLcQ4MCQC&pg=PA41 | postscript=. }}. The radius (R_*) is given by:

: $\begin{align} 2\cdot R_*
& = \frac{(170\cdot 3.67\cdot 10^{-3})\ \text{AU}}{0.0046491\ \text{AU}/R_{\bigodot}} \\
& \approx 134\cdot R_{\bigodot}
\end{align}$

{{cite journal|bibcode=1986EgUBV........0M|title=Compilation of Eggen's UBV data, transformed to UBV (unpublished)|journal=Catalogue of Eggen's UBV Data|last1=Mermilliod|first1=J.-C.|year=1986}}

{{cite journal|bibcode=2000MNRAS.311..636K|title=Rapidly oscillating M giant stars?|journal=Monthly Notices of the Royal Astronomical Society|volume=311|issue=3|pages=636|last1=Koen|first1=Chris|last2=Laney|first2=Dave|year=2000|doi=10.1046/j.1365-8711.2000.03127.x|doi-access=free}}

{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%20631 HR 631]
[http://aladin.u-strasbg.fr/AladinPreview?-c=02+10+37.6%2B19+30+01&ident=V*+AV+Ari&submit=Aladin+previewer Image 15 Arietis]

013325

010155

Arietis, 15

Category:Aries (constellation)

Category:M-type giants

Arietis, AV

0631

Category:Short period semiregular variable

Category:Durchmusterung objects