IRAS 04125+2902

{{Starbox begin

|name=IRAS 04125+2902

}}

{{Starbox image

| image = 250px

| caption = IRAS 04125+2902 (green star in the middle) and its companion (yellow star below)

| credit = Pan-STARRS & Meli thev

}}

{{Starbox observe

| epoch = J2000

| equinox = J2000

| ra = {{RA|04|15|42.7871}}

| dec = {{DEC|+29|09|59.832}}

| constell = Taurus{{cite web |url=http://djm.cc/constellation.html |title=Finding the constellation which contains given sky coordinates |date=2 August 2008 |website=djm.cc |access-date=23 May 2024 |archive-date=15 August 2019 |archive-url=https://web.archive.org/web/20190815143107/http://djm.cc/constellation.html |url-status=live }}

| appmag_v = {{val|15.487|0.003}}

}}

{{Starbox character

| type = Protostar

| class = M1.25{{±|0.25}} + M6.5

| variable = T Tauri

}}

{{Starbox astrometry

| radial_v = {{val|13.35|0.39}}

| prop_mo_ra = +21.811

| prop_mo_dec = {{val|-18.145}}

| pm_footnote =

| parallax = 6.2474

| p_error = 0.0270

| parallax_footnote =

}}

{{Starbox detail

| source =

| component1 = Primary

| mass = {{val|0.70|0.04}}

| radius = {{val|1.45|0.1}}

| luminosity = {{val|0.466|0.041}}

| temperature = {{val|4080|95|fmt=commas}}

| rotation = {{val|11.31|0.06|ul=day}}

| rotational_velocity = {{val|7.1|0.5}}

| age_myr = {{val|3.3|0.6|0.5}}

| component2 = Companion

| mass2 = {{val|0.17|0.04}}

| radius2 = {{val|0.96|0.12}}

| luminosity2 = {{val|0.050|0.004}}

| temperature2 = {{val|2830|90|fmt=commas}}

}}

{{Starbox catalog

| names = {{odlist|2MASS=J04154278+2909597|IRAS=IRAS 04125+2902|TIC=56658270|WISE=J041542.77+290959.5}}

}}

{{Starbox reference

| Simbad = TIC+56658270

}}

IRAS 04125+2902 is a M-type star and a T Tauri variable located in the Taurus Molecular Cloud, {{Convert|160|pc|ly|lk=on|abbr=off}} from Earth. This young protostar has 70% of the Sun's mass, 1.45 times the Sun's radius and an effective temperature of {{Convert|4080|K|C F|lk=in|abbr=on}}. It has a very young age of three million years. It is surrounded by a transitional disk, inclined at 30° relative to Earth, and has one known exoplanet.

It is part of a binary system with 2MASS J04154269+2909558, the two being separated by a projected distance of 635 astronomical units, or 4 arcseconds in the sky. The companion was discovered in 2009, has a spectral type of M6.5, and does not show any infrared excess. Gaia astrometry is similar between 2MASS J04154269+2909558 and IRAS 04125+2902.

The dust disk around IRAS 04125+2902 is truncated, which could be caused by disk evolution or by an eccentric companion. It is unlikely that the wide companion is responsible for the disk truncation, as it's projected distance is much larger than the dust disk's outer limit, but given that the orbital eccentricity of the companion is unknown, this remains plausible.

Planetary system

IRAS 04125+2902 hosts one confirmed exoplanet, IRAS 04125+2902 b, which has an orbital period of nine days around its star, orbiting it closely. It was discovered in 2024 using the transit method and is the youngest transiting exoplanet so far discovered. It is notable as a precursor of super-Earths or sub-Neptunes, commonly found planets. The planet is currently similar to Jupiter in size and it's mass is constrained to be less than {{jupiter mass|0.3}}. Over time, it will become a sub-Saturn or sub-Neptune with 60% of its current size or less.

The outer disk is misaligned with the planet and the outer companion, which could be caused by infalling material from the Taurus molecular cloud, but this remains unclear. This misaligment also made it possible to detect IRAS 04125+2902 b via the transit method.

{{Orbitbox planet begin

| name = IRAS 04125+2902

| table_ref =

}}

{{Orbitbox planet

| exoplanet = b

| mass = <0.3

| radius = {{val|0.97|0.057}}

| semimajor = {{val|0.0813|0.0048|0.0081}}

| inclination = {{val|88.76|0.87|1.0}}

| period = {{val|8.834976|(24)}}

}}

{{Orbitbox planet disk

| disk = Wall/Inner edge

| periapsis =

| apoapsis = <18

| inclination = 20

}}

{{Orbitbox planet disk

| disk = Dust disk

| periapsis = 20

| apoapsis = 60

| inclination = <30

}}

References

{{Reflist|refs=

{{Cite journal |last1=Luhman |first1=K. L. |last2=Mamajek |first2=E. E. |last3=Shukla |first3=S. J. |last4=Loutrel |first4=N. P. |date=2017-01-01 |title=A Survey for New Members of the Taurus Star-forming Region with the Sloan Digital Sky Survey |journal=The Astronomical Journal |volume=153 |issue=1 |pages=46 |arxiv=1610.09412 |bibcode=2017AJ....153...46L |doi=10.3847/1538-3881/153/1/46 |doi-access=free |issn=0004-6256}}

{{Cite journal |last1=Luhman |first1=K. L. |last2=Mamajek |first2=E. E. |last3=Allen |first3=P. R. |last4=Cruz |first4=K. L. |date=2009-09-01 |title=An Infrared/X-Ray Survey for New Members of the Taurus Star-Forming Region |url=https://ui.adsabs.harvard.edu/abs/2009ApJ...703..399L/abstract |journal=The Astrophysical Journal |volume=703 |issue=1 |pages=399–419 |arxiv=0911.5451 |bibcode=2009ApJ...703..399L |doi=10.1088/0004-637X/703/1/399 |issn=0004-637X}}

{{Cite journal |last1=Barber |first1=Madyson G. |last2=Mann |first2=Andrew W. |last3=Vanderburg |first3=Andrew |last4=Krolikowski |first4=Daniel |last5=Kraus |first5=Adam |last6=Ansdell |first6=Megan |last7=Pearce |first7=Logan |last8=Mace |first8=Gregory N. |last9=Andrews |first9=Sean M. |last10=Boyle |first10=Andrew W. |last11=Collins |first11=Karen A. |last12=De Furio |first12=Matthew |last13=Dragomir |first13=Diana |last14=Espaillat |first14=Catherine |last15=Feinstein |first15=Adina D. |date=November 2024 |title=A giant planet transiting a 3-Myr protostar with a misaligned disk |url=https://www.nature.com/articles/s41586-024-08123-3 |journal=Nature |language=en |volume=635 |issue=8039 |pages=574–577 |doi=10.1038/s41586-024-08123-3 |pmid=39567788 |issn=1476-4687 |arxiv=2411.18683 |bibcode=2024Natur.635..574B}}

{{Cite simbad|title=IRAS 04125+2902|access-date=|accessdate=2024-12-20}}

{{Cite journal |last1=Espaillat |first1=C. |last2=Andrews |first2=S. |last3=Powell |first3=D. |last4=Feldman |first4=D. |last5=Qi |first5=C. |last6=Wilner |first6=D. |last7=D’Alessio |first7=P. |date=2015-07-09 |title=The Transitional Disk Around Iras 04125+2902 |journal=The Astrophysical Journal |volume=807 |issue=2 |pages=156 |doi=10.1088/0004-637x/807/2/156 |arxiv=1506.01007 |bibcode=2015ApJ...807..156E |issn=1538-4357}}

}}

Category:Binary stars

Category:M-type main-sequence stars

Category:IRAS catalogue objects

Category:Circumstellar disks

Category:Planetary systems with one confirmed planet

Category:Taurus (constellation)

IRAS 04125+2902

Planetary system

See also

References