WASP-46

{{Starbox observe

| epoch = J2000

| constell = Indus

| ra = {{RA|21|14|56.85987}}

| dec = {{DEC|-55|52|18.4581}}

| appmag_v = 12.9

}}

{{Starbox character

| type = main sequence

| class = G6V

}}

{{Starbox astrometry

| radial_v = {{val|-3.28|1.62}}

| prop_mo_ra = +12.521

| prop_mo_dec = −16.150

| pm_footnote =

| parallax = 2.6878

| p_error = 0.0131

| parallax_footnote =

}}

{{Starbox detail

| source =

| mass = {{val|0.828|0.067}}

| radius = {{val|0.858|0.024}}

| gravity = {{val|4.489|0.013}}

| luminosity =

| temperature = {{val|5600|150}}

| metal_fe = {{val|−0.37|0.13}}

| rotation = {{val|16.0|1.0|ul=d}}

| rotational_velocity = {{val|1.9|1.2}}

| age_gyr = {{val|9.6|3.4|4.2}}

}}

{{Starbox catalog

| names = {{odlist | 2MASS=J21145687-5552184 | DENIS=J211456.8-555218 | GSC=08797-00758 | TIC=231663901 | TOI=101 | WASP=46}}

}}

{{Starbox reference

| Simbad = WASP-46

| NSTED = WASP-46

}}

WASP-46 is a G-type main-sequence star about {{convert|1210|ly|pc|lk=on|abbr=off}} away. The star is older than the Sun and is strongly depleted in heavy elements compared to the Sun, having just 45% of the solar abundance. Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet in a close orbit.

The star displays excess ultraviolet emission associated with starspot activity,{{citation|doi=10.1088/0004-637X/766/1/9|title=An Ultraviolet Investigation of Activity on Exoplanet Host Stars|year=2013|last1=Shkolnik|first1=Evgenya L.|s2cid=118415788|journal=The Astrophysical Journal|volume=766|issue=1|page=9|arxiv=1301.6192|bibcode=2013ApJ...766....9S}} and is suspected to be surrounded by a dust and debris disk.{{citation|arxiv=1203.0013|title=Warm Debris Disks Candidates in Transiting Planets Systems|year=2012|doi=10.1051/0004-6361/201118306|last1=Ribas|first1=Á.|last2=Merín|first2=B.|last3=Ardila|first3=D. R.|last4=Bouy|first4=H.|s2cid=29380547|journal=Astronomy & Astrophysics|volume=541|pages=A38|bibcode=2012A&A...541A..38R}}

Planetary system

In 2011 a transiting hot superjovian planet, WASP-46b, was detected. The planet's equilibrium temperature is {{val|fmt=commas|1636|44|ul=K}}. The dayside temperature measured in 2014 is much higher at {{val|fmt=commas|2386|u=K}}, indicating a very poor heat redistribution across the planet.{{citation|arxiv=1405.7048|title=Observed spectral energy distribution of the thermal emission from the dayside of WASP-46b|year=2014|doi=10.1051/0004-6361/201423795|last1=Chen|first1=G.|last2=Van Boekel|first2=R.|last3=Wang|first3=H.|last4=Nikolov|first4=N.|last5=Seemann|first5=U.|last6=Henning|first6=Th.|s2cid=119187817|journal=Astronomy & Astrophysics|volume=567|pages=A8}} A re-measurement of the dayside planetary temperature in 2020 resulted in a lower value of {{val|fmt=commas|1870|130|120|u=K}}.

In 2017, a search for transit-timing variations of WASP-46b yielded zero results, thus ruling out existence of additional gas giants in the system. The orbital decay of WASP-46b was also not detected.{{citation|arxiv=1710.04707|title=A search for transit timing variations and orbital decay in WASP-46b|year=2018|doi=10.1093/mnras/stx2647|last1=Petrucci|first1=R.|last2=Jofré|first2=E.|last3=Ferrero|first3=L. V.|last4=Cúneo|first4=V.|last5=Saker|first5=L.|last6=Lovos|first6=F.|last7=Gómez|first7=M.|last8=Mauas|first8=P.|s2cid=54509070|journal=Monthly Notices of the Royal Astronomical Society|volume=473|issue=4|pages=5126–5141|doi-access=free |bibcode=2018MNRAS.473.5126P}}

{{OrbitboxPlanet begin

| table_ref =

}}

{{OrbitboxPlanet

| exoplanet = b

| mass = {{val|1.91|0.11}}

| radius = {{val|1.174|0.033}}

| semimajor = {{val|0.02335|0.00063}}

| period = {{val|1.43036763|(93)}}

| eccentricity = <0.022

| inclination = {{val|82.80|0.17}}

}}

References

{{Reflist|refs=

{{citation|arxiv=1105.3179|title=WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets|year=2012|doi=10.1111/j.1365-2966.2012.20635.x|last1=Anderson|first1=D. R.|last2=Collier Cameron|first2=A.|last3=Gillon|first3=M.|last4=Hellier|first4=C.|last5=Jehin|first5=E.|last6=Lendl|first6=M.|last7=Maxted|first7=P. F. L.|last8=Queloz|first8=D.|last9=Smalley|first9=B.|last10=Smith|first10=A. M. S.|last11=Triaud|first11=A. H. M. J.|last12=West|first12=R. G.|last13=Pepe|first13=F.|last14=Pollacco|first14=D.|last15=Ségransan|first15=D.|last16=Todd|first16=I.|last17=Udry|first17=S.|s2cid=34406657|journal=Monthly Notices of the Royal Astronomical Society|volume=422|issue=3|pages=1988–1998|doi-access=free |bibcode=2012MNRAS.422.1988A}}

{{citation|arxiv=1503.09111|title=A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars|year=2015|doi=10.1051/0004-6361/201525774|last1=Maxted|first1=P. F. L.|last2=Serenelli|first2=A. M.|last3=Southworth|first3=J.|s2cid=53324330|journal=Astronomy & Astrophysics|volume=577|pages=A90|bibcode=2015A&A...577A..90M}}

{{citation|arxiv=1511.05171|title=Physical properties of the planetary systems WASP-45 and WASP-46 from simultaneous multi-band photometry|year=2016|doi=10.1093/mnras/stv2698|last1=Ciceri|first1=S.|last2=Mancini|first2=L.|last3=Southworth|first3=J.|last4=Lendl|first4=M.|last5=Tregloan-Reed|first5=J.|last6=Brahm|first6=R.|last7=Chen|first7=G.|last8=d'Ago|first8=G.|last9=Dominik|first9=M.|last10=Figuera Jaimes|first10=R.|last11=Galianni|first11=P.|last12=Harpsøe|first12=K.|last13=Hinse|first13=T. C.|last14=Jørgensen|first14=U. G.|last15=Juncher|first15=D.|last16=Korhonen|first16=H.|last17=Liebig|first17=C.|last18=Rabus|first18=M.|last19=Bonomo|first19=A. S.|last20=Bott|first20=K.|last21=Henning|first21=Th.|last22=Jordán|first22=A.|last23=Sozzetti|first23=A.|last24=Alsubai|first24=K. A.|last25=Andersen|first25=J. M.|last26=Bajek|first26=D.|last27=Bozza|first27=V.|last28=Bramich|first28=D. M.|last29=Browne|first29=P.|last30=Calchi Novati|first30=S.|s2cid=14670311|journal=Monthly Notices of the Royal Astronomical Society|volume=456|issue=1|pages=990–1002|doi-access=free |bibcode=2016MNRAS.456..990C|display-authors=29}}

{{cite journal |last1=Bonomo |first1=A. S. |last2=Desidera |first2=S. |display-authors=etal |date=June 2017 |title=The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets |journal=Astronomy & Astrophysics |volume=602 |issue= |pages=A107 |doi=10.1051/0004-6361/201629882 |arxiv=1704.00373 |bibcode=2017A&A...602A.107B|s2cid=118923163 }}

{{citation|arxiv=2003.06407|title=Systematic phase curve study of known transiting systems from year one of the TESS mission|year=2020|doi=10.3847/1538-3881/ababad|last1=Wong|first1=Ian|last2=Shporer|first2=Avi|last3=Daylan|first3=Tansu|last4=Benneke|first4=Björn|last5=Fetherolf|first5=Tara|last6=Kane|first6=Stephen R.|last7=Ricker|first7=George R.|last8=Vanderspek|first8=Roland|last9=Latham|first9=David W.|last10=Winn|first10=Joshua N.|last11=Jenkins|first11=Jon M.|last12=Boyd|first12=Patricia T.|last13=Glidden|first13=Ana|last14=Goeke|first14=Robert F.|last15=Sha|first15=Lizhou|last16=Ting|first16=Eric B.|last17=Yahalomi|first17=Daniel|journal=The Astronomical Journal|volume=160|issue=4|page=155|bibcode=2020AJ....160..155W|s2cid=212717799 |doi-access=free }}

}}

Category:Indus (constellation)

Category:G-type main-sequence stars

Category:Planetary systems with one confirmed planet

Category:Planetary transit variables

J21145687-5552184

101

231663901