IU Aurigae

{{Short description|Triple star system in the constellation Auriga}}

{{Starbox begin}}

{{Starbox image

| image = 250px

| caption = A visual band light curve for IU Aurigae, adapted from Özdemir et al. (2003)

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|05|27|52.40539}}

| dec = {{DEC|+34|46|58.3435}}

| appmag_v = {{nowrap|8.19 to 8.83}}

| constell = Auriga

}}

{{Starbox character

| type =

| class = {{nowrap|B0p + B1Vp}} + ?

| b-v = 0.18

| u-b = -0.66

| variable = Eclipsing binary

}}

{{Starbox astrometry

| radial_v = 9 ± 5

| prop_mo_ra = −4.479

| prop_mo_dec = -9.049

| parallax = 0.4786

| p_error = 0.5765

| parallax_footnote =

| absmag_v =

}}{{Starbox catalog

| names = {{odlist | V=IU Aur | BD=+34°1051 | HD=35652 | HIP=25565 | SAO=58059 | PPM=70395 }}

}}

{{Starbox reference

| Simbad = IU+Aur

}}

{{Starbox end}}

IU Aurigae is a triple star system in the constellation Auriga, consisting of an eclipsing binary pair orbiting a third component with a period of 335 years. This system is too faint to be viewed with the naked eye, having a peak apparent visual magnitude of 8.19.

Pavel Mayer discovered that the star's brightness varies in 1964. The eclipsing pair form a Beta Lyrae-type semidetached binary of two Bp stars with a period of 1.81147435 days. During the primary eclipse, the visual magnitude of the system drops to 8.89, while for the secondary it decreases to 8.74. The third component is a massive object with {{nowrap|17–18 }}{{solar mass}}, and may actually be a binary – which would make this a quadruple star system.

References

{{reflist|refs=

{{cite journal |last1=Özdemir |first1=S. |last2=Mayer |first2=P. |last3=Drechsel |first3=H. |last4=Demircan |first4=O. |last5=Ak |first5=H. |title=Refinement of third body parameters and new photometric results for the early-type multiple system IU Aurigae |journal=Astronomy & Astrophysics |date=May 2003 |volume=403 |issue=2 |pages=675–681 |doi=10.1051/0004-6361:20030392 |bibcode=2003A&A...403..675O |doi-access=free }}

{{cite DR2|182856896896621952}}

{{cite simbad | title=IU Aur | access-date=2019-08-18 }}

{{citation

| title=Up-to-date parameters of the eclipsing triple system IU AUR

| last1=Mayer | first1=P. | last2=Drechsel | first2=H.

| journal=Astronomy and Astrophysics

| volume=183 | issue=1 | pages=61–65 | date=September 1987

| bibcode=1987A&A...183...61M | postscript=. }}

{{citation

| title=Eclipsing variables: Catalogue and classification

| display-authors=1 | last1=Avvakumova | first1=E. A.

| last2=Malkov | first2=O. Yu. | last3=Kniazev | first3=A. Yu.

| journal=Astronomische Nachrichten

| volume=334 | issue=8 | pages=860 | date=October 2013

| doi=10.1002/asna.201311942 | bibcode=2013AN....334..860A | hdl=10995/27061 | hdl-access=free }}

{{cite journal

| last1=Mayer | first1=P. | title=New Bright Early Type Eclipsing Variable

| journal=Information Bulletin on Variable Stars | date=March 1964 | volume=49

| page=1 | bibcode=1964IBVS...49....1M | url=https://ibvs.konkoly.hu/pub/ibvs/0001/0049.pdf

| access-date=29 November 2024}}

{{citation | postscript=.

| display-authors=1 | last1=Samus | first1=N. N.

| last2=Kazarovets | first2=E. V. | last3=Durlevich | first3=O. V.

| last4=Kireeva | first4=N. N. | last5=Pastukhova | first5=E. N.

| title=General Catalogue of Variable Stars

| version=5.1 | journal=Astronomy Reports

| year=2017 | volume=61 | issue=1 | pages=80–88

| bibcode=2017ARep...61...80S | doi=10.1134/S1063772917010085 | s2cid=125853869 }}

{{citation

| title=New photometric and spectroscopic results for IU Aurigae -- an early-type eclipsing binary in a multiple system

| last1=Drechsel | first1=H. | last2=Haas | first2=S.

| last3=Lorenz | first3=R. | last4=Mayer | first4=P.

| journal=Astronomy and Astrophysics

| volume=284 | issue=3 | pages=853–864 | date=April 1994

| bibcode=1994A&A...284..853D | postscript=. }}

{{citation

| url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=4000

| title=IU Aurigae | last=Watson | first=Christopher

| date=January 4, 2010 | postscript=.

| work=The International Variable Star Index

| publisher=American Association of Variable Star Observers

| access-date=2019-08-18 }}

}}

{{Stars of Auriga}}

{{DEFAULTSORT:IU Aurigae}}

Category:B-type main-sequence stars

Category:Ap stars

Category:Beta Lyrae variables

Category:Spectroscopic binaries

Category:Triple star systems

Category:Auriga

Category:Durchmusterung objects

035652

025565

Aurigae, IU