Gliese 832 b

{{Short description|Extrasolar planet in the constellation Grus}}

{{Infobox planet

| name = Gliese 832 b

| discovery_ref =

| discoverer = Bailey et al.

| discovery_site = Anglo-Australian Observatory

| discovered = September 1, 2008

| discovery_method = Doppler spectroscopy

| orbit_ref =

| apsis = astron

| semimajor = {{val|3.7|0.1|ul=AU}}

| eccentricity = {{val|0.05|0.03}}

| period = {{val|3853|51|47|ul=d}}
{{val|10.55|0.14|0.13|ul=yr}}

| inclination = {{val|51|3|u=deg}} or {{val|134|3|u=deg}}

| asc_node = {{val|61|17|13|u=deg}} or {{val|265|12|15|u=deg}}

| time_periastron = {{val|2456696|454|338|ul=JD}}

| arg_peri = {{val|207|22|31|u=deg}}

| star = Gliese 832

| physical_ref =

| mass = {{val|0.99|0.09|0.08|ul=Jupiter mass}}

}}

Gliese 832 b (Gl 832 b or GJ 832 b) is a gas giant exoplanet about the mass of Jupiter, located 16.2 light-years from the Sun in the constellation of Grus, orbiting the red dwarf star Gliese 832.{{cite web|title=Nearby Alien Planet May Be Capable of Supporting Life|last=Wall|first=Mike|publisher=Space.com|date=June 25, 2014|url=http://www.space.com/26357-exoplanet-habitable-zone-gliese-832c.html|access-date=July 1, 2014|archive-date=July 12, 2018|archive-url=https://web.archive.org/web/20180712234753/http://www.space.com/26357-exoplanet-habitable-zone-gliese-832c.html|url-status=live}}

Orbit

The planet takes 10.5 years to revolve around its star at an orbital distance of 3.7 AU; at the time of discovery, this was the longest-period Jupiter-like planet known orbiting a red dwarf. The brightness of the faint parent star at that distance corresponds to the brightness of the Sun from 80 AU (or 100 times brighter than a full Moon as seen from Earth).

Discovery

The planet was discovered at the Anglo-Australian Observatory on September 1, 2008. It would induce an astrometric perturbation on its star of at least 0.95 milliarcseconds and is thus a good candidate for being detected by astrometric observations. Despite its relatively large angular distance, direct imaging is problematic due to the star–planet contrast. Gliese 832 b was confirmed and its orbital solution refined by subsequent studies in 2011, 2014, and 2022. The planet was detected astrometrically by two different 2023 studies, determining its inclination and revealing a true mass close to the mass of Jupiter.

References

{{Reflist|refs=

{{cite journal|author=Bailey, Jeremy|display-authors=etal|title=A Jupiter-like Planet Orbiting the Nearby M Dwarf GJ832|year=2008|doi=10.1088/0004-637X/690/1/743|journal=The Astrophysical Journal|volume=690|issue=1 |pages=743–747|arxiv=0809.0172|bibcode = 2009ApJ...690..743B |s2cid=17172233 }}

{{cite journal |doi=10.1051/0004-6361/201014704 |last1=Bonfils |first1=Xavier |last2=Delfosse |first2=Xavier |last3=Udry |first3=Stéphane |last4=Forveille |first4=Thierry |last5=Mayor |first5=Michel |last6=Perrier |first6=Christian |last7=Bouchy |first7=François |last8=Gillon |first8=Michaël |last9=Lovis |first9=Christophe |last10=Pepe |first10=Francesco |last11=Queloz |first11=Didier |last12=Santos |first12=Nuno C. |last13=Ségransan |first13=Damien |last14=Bertaux |first14=Jean-Loup |title=The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample |journal=Astronomy and Astrophysics |date=2011 |volume=549 |bibcode=2013A&A...549A.109B |arxiv = 1111.5019 |pages=A109 |s2cid=119288366 }}

{{cite journal |last1=Wittenmyer |first1=R.A. |last2=Tuomi |first2=M. |last3=Butler |first3=R.P. |last4=Jones |first4=H. R. A. |last5=Anglada-Escude |first5=G. |last6=Horner |first6=J. |last7=Tinney |first7=C.G. |last8=Marshall |first8=J.P. |last9=Carter |first9=B.D. |date=2014 |title= GJ 832c: A super-earth in the habitable zone |journal=The Astrophysical Journal |volume=1406 |issue=2 |pages=5587 |arxiv=1406.5587 |bibcode = 2014ApJ...791..114W |display-authors=etal |doi=10.1088/0004-637X/791/2/114 |s2cid=12157837 }}

{{cite journal |last1=Gorrini |first1=P. |last2=Astudillo-Defru |first2=N. |display-authors=etal |date=August 2022 |title=Detailed stellar activity analysis and modelling of GJ 832: Reassessment of the putative habitable zone planet GJ 832c |journal=Astronomy & Astrophysics |volume=664 |issue= |pages=A64 |doi=10.1051/0004-6361/202243063 |arxiv=2206.07552 |bibcode=2022A&A...664A..64G|s2cid=249674385 }}

{{cite journal |last1=Xiao |first1=Guang-Yao |last2=Liu |first2=Yu-Juan |display-authors=etal |date=May 2023 |title=The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements |journal=Research in Astronomy and Astrophysics |volume=23 |issue=5 |pages=055022 |doi=10.1088/1674-4527/accb7e |arxiv=2303.12409 |bibcode=2023RAA....23e5022X |s2cid=257663647}}

{{cite journal |last1=Philipot |first1=F. |last2=Lagrange |first2=A.-M. |display-authors=etal |date=October 2023 |title=A multi-technique approach to identifying and/or constraining radial-velocity substellar companions |journal=Astronomy & Astrophysics |volume=678 |issue= |pages=A107 |doi=10.1051/0004-6361/202346612 |arxiv=2308.05417 |bibcode=2023A&A...678A.107P}}

}}

External links

{{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=GJ+832 | title=GJ 832 | work=Exoplanets | access-date=2008-10-11 | archive-url=https://web.archive.org/web/20091125030620/http://media4.obspm.fr/exoplanets/base/etoile.php?nom=GJ+832 | archive-date=2009-11-25 | url-status=dead }}

Category:Exoplanets discovered in 2008

Category:Grus (constellation)

Category:Giant planets

Category:Exoplanets detected by radial velocity

Category:Exoplanets detected by astrometry

Category:Gliese 832

Gliese 832 b

Orbit

Discovery

See also

References

External links