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HD 38529

{{Short description|Binary star system in the constellation Orion}}

{{Starbox begin

| name = HD 38529 A/B

}}

{{Starbox observe 2s

| epoch = J2000.0

| constell = Orion

| component1 = HD 38529 A

| ra1 = {{RA|05|46|34.91314}}

| dec1 = {{DEC|+01|10|05.5029}}

| appmag_v1 = +5.95

| component2 = HD 38529 B

| ra2 = {{RA|05|46|19.37663}}

| dec2 = {{DEC|+01|12|47.2640}}

| appmag_v2 = +13.35

}}

{{Starbox character

| class = G4IV / M3.0V

| b-v = 0.773 / 0.46{{cn|date=April 2025}}

| u-b =

| variable =

}}

{{Starbox astrometry

| component1 = HD 38529 A

| radial_v = {{val|30.19|0.12}}

| prop_mo_ra = {{val|-77.806}}

| prop_mo_dec = {{val|-141.363}}

| pm_footnote =

| parallax = 23.5714

| p_error = 0.0422

| parallax_footnote =

| absmag_v = +2.81

| component2 = HD 38529 B

| radial_v2 = {{val|30.94|0.43}}

| prop_mo_ra2 = {{val|-78.612}}

| prop_mo_dec2 = {{val|-142.084}}

| pm_footnote2 =

| parallax2 = 23.7139

| p_error2 = 0.0168

| parallax_footnote2 =

| absmag_v2 = +10.23{{cn|date=April 2025}}

}}

{{Starbox detail

| source =

| component1 = HD 38529 A

| mass = 1.479{{±|0.037}}

| radius = 2.678{{±|0.026}}

| luminosity = 6.16{{±|0.15}}

| gravity = {{val|3.83|0.06}}

| temperature = {{val|5619|44}}

| metal_fe = {{val|0.38|0.03}}

| rotation = {{val|37.0|0.4|ul=d}}

| rotational_velocity = {{val|3.20|0.50}}

| age_gyr = 3.07{{±|0.39}}

| component2 = HD 38529 B

| mass2 = 0.494

| radius2 = 0.496

| luminosity2 = 0.033

| gravity2 = 4.74

| temperature2 = 3,487

| metal_fe2 = 0.39

| rotation2 =

| rotational_velocity2 = 17

| age_gyr2 =

}}

{{Starbox catalog

| names = {{odlist | name=RAG 1 | WDS=J05466+0110AB }}

| component1 = HD 38529 A

| names1 = {{odlist | BD=+01°1126 | HIP=27253 | HR=1988 | SAO 113119 | WDS=J05466+0110A }}

| component2 = HD 38529 B

| names2 = {{odlist | 2MASS=J05461937+0112471 | LP=598-99 | WDS=J05466+0110B }}

}}

{{Starbox reference

| Simbad = HD+38529 | sn=A

| Simbad2 = HD+38529B | sn2=B

| NSTED = HD-38529

}}

{{Starbox end}}

HD 38529 (138 G. Orionis) is a binary star system approximately 138 light-years away in the constellation of Orion.

HD 38529 A

HD 38529 A is a yellow subgiant star of spectral type G4IV, though it has also been classified as a main sequence dwarf of type G4V and a borderline giant star of type G8III/IV. It is about 48% more massive than the Sun.

Two substellar companions are known in orbit around this star, including one with a mass near the deuterium fusion limit that is often used as the dividing line between giant planets and brown dwarfs. There is a debris disk located at least 86 astronomical units from the star. Its orbit is probably mildly misaligned with the planetary orbits, by 21−45°.

=Planetary system=

In 2001, the planet HD 38529 b was discovered orbiting the star HD 38529 A by Debra Fischer and collaborators who detected it using the Doppler spectroscopy technique. It has a mass at least 78% that of Jupiter and orbits very close to the star, just beyond the distance limit for hot Jupiters. It does not transit the star.

In 2003, a massive superjovian HD 38529 c was found orbiting at 3.68 AU with a minimum mass of 12.7 Jupiter masses. Astrometric measurements from the Hipparcos satellite gave a best fit inclination of 160° and a true mass 37 times that of Jupiter, turning this planet into a brown dwarf.

Further study of the system using Hubble Space Telescope astrometry revised the mass of HD 38529 c downwards to 17.7 Jupiter masses and suggested the presence of an additional planet, orbiting in the gap between HD 38529 b and c. The possible third planet was refuted after additional radial velocity measurements were collected. Subsequent astrometric studies have found masses for HD 38529 c ranging from just {{Jupiter mass|10.4}} to {{Jupiter mass|18}}, with the most recent value as of 2025 being {{Jupiter mass|12.9}}.

{{OrbitboxPlanet begin

| name = HD 38529 A

| table_ref = {{Efn|HD 38529 b: Xuan et al. (2020)
HD 38529 c: Feng et al. (2025)
Debrisk disk: Henry et al. (2013)}}

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|0.8047|0.0139|p=≥}}

| period = {{val|14.30978|0.00033}}

| semimajor = {{val|0.1278|0.0006}}

| eccentricity = {{val|0.259|0.016}}

}}

{{OrbitboxPlanet

| exoplanet = c

| mass = {{val|12.93|0.70|0.49}}

| period = {{val|2127.8|3.3|3.2}}

| semimajor = {{val|3.604|0.043|0.042}}

| eccentricity = {{val|0.3507|0.0057|0.0051}}

| inclination = {{val|104.2|8.9|11}}

}}

{{OrbitboxPlanet disk

| disk = Debris disk

| periapsis = {{val|46|38|27}}

| apoapsis = {{val|208|54}}

| inclination = {{val|71|10|7}}

}}

{{Orbitbox end}}

HD 38529 B

HD 38529 B is a common proper motion stellar companion to HD 38529 A at a projected distance of about ~12000 astronomical units. The star is a red dwarf of spectral type M3.0V. Wide binary stars such as HD 38529 AB have been shown to be vulnerable to disruption by galactic tides and perturbations by passing stars.

See also

Notes

{{notelist}}

References

{{Reflist|refs=

{{cite constellation|HD 38529}}

{{cite journal

| url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=V%2F135%2Fcatalog

| last=Gould | first=Benjamin Apthorp | date=1879

| title=Uranometria Argentina catalog of bright southern stars

| journal=Resultados del Observatorio Nacional Argentino en Cordoba

| volume=1 | publication-place=Buenos Aires

| bibcode=1879RNAO....1.....G | access-date=2012-05-08

}}

{{cite journal|bibcode=1999MSS...C05....0H|title=Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5|journal=Michigan Spectral Survey|volume=5|author1=Houk, N.|author2=Swift, C.|year=1999}}

{{cite journal | title=The Mass of HD 38529c from Hubble Space Telescope Astrometry and High-precision Radial Velocities | last1=Benedict | first1=G. Fritz | last2=McArthur | first2=Barbara E. | last3=Bean | first3=Jacob L. | last4=Barnes | first4=Rory | last5=Harrison | first5=Thomas E. | last6=Hatzes | first6=Artie | last7=Martioli | first7=Eder | last8=Nelan | first8=Edmund P. | display-authors=1 | journal=The Astronomical Journal | volume=139 | issue=5 | pages=1844–1856 | year=2010 | arxiv=1003.0421 | bibcode=2010AJ....139.1844B | bibcode-access=free | doi=10.1088/0004-6256/139/5/1844 | doi-access=free }}

{{cite journal | title=Galactic perturbations on the population of wide binary stars with exoplanets | url=https://www.aanda.org/articles/aa/full_html/2017/12/aa31229-17/aa31229-17.html | last1=Correa-Otto | first1=J. A. | last2=Gil-Hutton | first2=R. A. | journal=Astronomy and Astrophysics | volume=608 | at=A116 | year=2017 | arxiv=1710.00766 | bibcode=2017A&A...608A.116C | bibcode-access=free | doi=10.1051/0004-6361/201731229 | hdl=11336/41265 | doi-access=free }}

{{cite journal | title=Planetary Companions to HD 12661, HD 92788, and HD 38529 and Variations in Keplerian Residuals of Extrasolar Planets | last1=Fischer | first1=Debra A. | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul | last4=Vogt | first4=Steven S. | last5=Frink | first5=Sabine | last6=Apps | first6=Kevin | display-authors=1 | journal=The Astrophysical Journal | volume=551 | issue=2 | pages=1107–1118 | date=2001 | bibcode=2001ApJ...551.1107F | bibcode-access=free | doi=10.1086/320224 | doi-access=free }}

{{cite journal | title=A Planetary Companion to HD 40979 and Additional Planets Orbiting HD 12661 and HD 38529 | last1=Fischer | first1=Debra A. | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul | last4=Vogt | first4=Steven S. | last5=Henry | first5=Gregory W. | last6=Pourbaix | first6=Dimitri | last7=Walp | first7=Bernard | last8=Misch | first8=Anthony A. | last9=Wright | first9=Jason T. | display-authors=1 | journal=The Astrophysical Journal | volume=586 | issue=2 | pages=1394–1408 | year=2003 | bibcode=2003ApJ...586.1394F | bibcode-access=free | doi=10.1086/367889 | doi-access=free }}

{{Cite Gaia DR3|3219847066672970368}}

{{Cite Gaia DR3|3219851121121855872}}

{{cite journal | title=Host Star Properties and Transit Exclusion for the HD 38529 Planetary System | last1=Henry | first1=Gregory W. | last2=Kane | first2=Stephen R. | last3=Wang | first3=Sharon X. | last4=Wright | first4=Jason T. | last5=Boyajian | first5=Tabetha S. | last6=von Braun | first6=Kaspar | last7=Ciardi | first7=David R. | last8=Dragomir | first8=Diana | last9=Farrington | first9=Chris | last10=Fischer | first10=Debra A. | last11=Hinkel | first11=Natalie R. | last12=Howard | first12=Andrew W. | last13=Jensen | first13=Eric | last14=Laughlin | first14=Gregory | last15=Mahadevan | first15=Suvrath | last16=Pilyavsky | first16=Genady | display-authors=1 | journal=The Astrophysical Journal | volume=768 | issue=2 | at=155 | year=2013 | arxiv=1303.4735 | bibcode=2013ApJ...768..155H | bibcode-access=free | doi=10.1088/0004-637X/768/2/155 | doi-access=free }}

{{cite journal | title=The Complete Census of 70 μm-bright Debris Disks within "the Formation and Evolution of Planetary Systems" Spitzer Legacy Survey of Sun-like Stars | last1=Hillenbrand |first1=Lynne A. | last2=Carpenter | first2=John M. | last3=Kim | first3=Jinyoung Serena | last4=Meyer | first4=Michael R. | last5=Backman | first5=Dana E. | last6=Moro-martín | first6=Amaya | last7=Hollenbach | first7=David J. | last8=Hines | first8=Dean C. | last9=Pascucci | first9=Ilaria | first10=Jeroen | last10=Bouwman | display-authors=1 | journal=The Astrophysical Journal | volume=677 | issue=1 | pages=630–656 | year=2008 | arxiv=0801.0163 | bibcode=2008ApJ...677..630H | bibcode-access=free | doi=10.1086/529027 | doi-access=free }}

{{cite journal | title=Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems | last1=Raghavan | first1=Deepak | last2=Henry | first2=Todd J. | last3=Mason | first3=Brian D. | last4=Subasavage | first4=John P. | last5=Jao | first5=Wei-Chun | last6=Beaulieu | first6=Thom D. | last7=Hambly | first7=Nigel C. | display-authors=1 | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=523–542 | year=2006 | arxiv=astro-ph/0603836 | bibcode=2006ApJ...646..523R | bibcode-access=free | doi=10.1086/504823 | doi-access=free }}

{{cite journal | title=Hipparcos astrometric orbits for two brown dwarf companions: HD 38529 and HD 168443 | last1=Reffert | first1=S. | last2=Quirrenbach | first2=A. | journal=Astronomy and Astrophysics | volume=449 | issue=2 | pages=699–702 | year=2006 | bibcode=2006A&A...449..699R | bibcode-access=free | doi=10.1051/0004-6361:20054611 | doi-access=free | hdl=1887/7483 | hdl-access=free }}

{{cite simbad | title=WDS J05466+0110AB | access-date=2019-09-07 }}

{{cite simbad | title=HD 38529 | access-date=2019-09-09 }}

{{cite simbad | title=HD 38529 B | access-date=2019-09-09 }}

{{cite journal|arxiv=2010.02961|title=Mutual inclinations between giant planets and their debris discs in HD 113337 and HD 38529|year=2020|doi=10.1093/mnras/staa3155|last1=Xuan|first1=Jerry W.|last2=Kennedy|first2=Grant M.|last3=Wyatt|first3=Mark C.|last4=Yelverton|first4=Ben|journal=Monthly Notices of the Royal Astronomical Society|volume=499|issue=4|pages=5059–5074|doi-access=free |bibcode=2020MNRAS.499.5059X|s2cid=222177269}}

{{cite journal|arxiv=2010.07323|title=Robust asteroseismic properties of the bright planet host HD 38529|year=2020|doi=10.1093/mnras/staa3190|last1=Ball|first1=Warrick H.|last2=Chaplin|first2=William J.|last3=Nielsen|first3=Martin B.|last4=González-Cuesta|first4=Lucia|last5=Mathur|first5=Savita|last6=Santos|first6=Ângela R G.|last7=García|first7=Rafael|last8=Buzasi|first8=Derek|last9=Mosser|first9=Benoît|last10=Deal|first10=Morgan|last11=Stokholm|first11=Amalie|last12=Mosumgaard|first12=Jakob Rørsted|last13=Silva Aguirre|first13=Victor|last14=Nsamba|first14=Benard|last15=Campante|first15=Tiago|last16=Cunha|first16=Margarida S.|last17=Ong|first17=Joel|last18=Basu|first18=Sarbani|last19=Örtel|first19=Sibel|last20=Çelik Orhan|first20=Z.|last21=Yıldız|first21=Mutlu|last22=Stassun|first22=Keivan|last23=Kane|first23=Stephen R.|last24=Huber|first24=Daniel|journal=Monthly Notices of the Royal Astronomical Society|volume=499|issue=4|pages=6084–6093|doi-access=free |bibcode=2020MNRAS.499.6084B|s2cid=222378164}}

{{cite journal |last1=Feng |first1=Fabo |last2=Butler |first2=R. Paul |display-authors=etal |date=August 2022 |title=3D Selection of 167 Substellar Companions to Nearby Stars |journal=The Astrophysical Journal Supplement Series |volume=262 |issue=21 |page=21 |doi=10.3847/1538-4365/ac7e57 |arxiv=2208.12720 |bibcode=2022ApJS..262...21F |s2cid=251864022 |doi-access=free }}

{{cite journal |last1=Feng |first1=Fabo |last2=Xiao |first2=Guang-Yao |display-authors=etal |date=April 2025 |title=Lessons learned from the detection of wide companions by radial velocity and astrometry |journal=Monthly Notices of the Royal Astronomical Society |volume= |issue= |pages= |doi= |arxiv=2412.14542}}

{{cite journal |bibcode=2019AJ....158..138S |title=The Revised TESS Input Catalog and Candidate Target List |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |display-authors=1 }}

{{cite journal |bibcode=2019ApJ...878..134K |title=Characterization of a Sample of Southern M Dwarfs Using Harps and X-shooter Spectra |last1=Kuznetsov |first1=M. K. |last2=Del Burgo |first2=C. |last3=Pavlenko |first3=Ya. V. |last4=Frith |first4=J. |journal=The Astrophysical Journal |date=2019 |volume=878 |issue=2 |page=134 |doi=10.3847/1538-4357/ab1fe9 |doi-access=free }}

}}

External links

  • {{cite encyclopedia|url=http://exoplanet.eu/star.php?st=HD+38529|archive-url=https://web.archive.org/web/20070702190411/http://exoplanet.eu/star.php?st=HD+38529|url-status=dead|archive-date=July 2, 2007|encyclopedia=Extrasolar Planets Encyclopaedia|title=Notes for star HD 38529|access-date=14 April 2006}}
  • [http://www.lpl.arizona.edu/~rory/research/xsp/dynamics/ Extrasolar Planet Interactions] {{Webarchive|url=https://web.archive.org/web/20160505160348/http://www.lpl.arizona.edu/~rory/research/xsp/dynamics/ |date=2016-05-05 }} by Rory Barnes & Richard Greenberg, Lunar and Planetary Lab, University of Arizona

{{Sky|05|46|34.9120|+|01|10|05.496|138.397}}

{{Stars of Orion}}

Category:Brown dwarfs

Category:G-type subgiants

038529

027253

1988

Category:M-type main-sequence stars

Category:Orion (constellation)

Category:Planetary systems with two confirmed planets

Category:Binary stars

BD+01 1126