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BF Orionis

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Coordinates:Sky map05h37m13.2624s,−06° 35′ 00.5654″
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BF Orionis

Avisual bandlight curveFor BF Orionis, adapted from Grininet al.(2010)[1]
Observation data
EpochJ2000EquinoxJ2000
Constellation Orion
Right ascension 05h37m13.2624s[2]
Declination −06° 35′ 00.5654″[2]
Apparent magnitude(V) 9.69
Characteristics
Evolutionary stage Herbig Ae/Be star
Spectral type A5II-III[3]
Apparent magnitude(g) 10.38
Astrometry
Proper motion(μ)RA:0.873±0.025mas/yr[2]
Dec.:0.654±0.023mas/yr[2]
Parallax(π)2.6173 ± 0.0279mas[2]
Distance1,250 ± 10ly
(382 ± 4pc)
Details
Mass1.85+0.15
−0.00[4]M☉
Radius1.59±0.20[4]R☉
Luminosity39[5]L☉
Surface gravity(logg)3.5[6]cgs
Temperature8750[6]K
Rotational velocity(vsini)37±2[3]km/s
Age17.14+2.80
−0.00[4]Myr
Other designations
BD-06 1259, GSC 04778-01087, HIP 26403,2MASSJ05371326-0635005, Gaia DR2 3016930993175537536, Gaia EDR3 3016930993175889792, TYC 4778-1087-1
Database references
SIMBADdata

BF Orionisis a youngHerbig Ae/Be starin the constellation ofOrionabout1250light yearsaway, within theOrion Nebula.It is the most massive star of the smallbirth clusterof four stars.[7]

Properties

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BF Orionis is a Herbig Ae/Be star variable similar toUX Orionis.It is still accreting mass, producing about 2L☉through the release of gravitational energy, and is surrounded by a massive, optically thickprotoplanetary diskof 0.005±0.002M☉[4]visible nearly edge-on. The brightness of the star is strongly variable, with irregular deep minima down to 13th magnitude. The variations are suspected to be partly caused by a brown dwarf or massive planet embedded in the protoplanetary disk,[1]together with very large comets.[8]

Unlike typical Herbig Ae/Be stars, 90-95% of which do not have detectable magnetic fields, BF Orionis has a fairly strong longitudinal magnetic field of −144±21gauss.[3]It also has small (0.11 magnitude) short-period, single-mode pulsations of theDelta Scutitype.[9]

References

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  1. ^abGrinin, V. P.; Rostopchina, A. N.; Barsunova, O. Yu.; Demidova, T. V. (2010). "Mechanism for cyclical activity of the Herbig Ae star BF Ori".Astrophysics.53(3): 367–372.Bibcode:2010Ap.....53..367G.doi:10.1007/s10511-010-9128-7.S2CID56017726.
  2. ^abcdBrown, A. G. A.;et al. (Gaia collaboration) (2021)."GaiaEarly Data Release 3: Summary of the contents and survey properties ".Astronomy & Astrophysics.649:A1.arXiv:2012.01533.Bibcode:2021A&A...649A...1G.doi:10.1051/0004-6361/202039657.S2CID227254300.(Erratum:doi:10.1051/0004-6361/202039657e).Gaia EDR3 record for this sourceatVizieR.
  3. ^abcWade, G. A.; Bagnulo, S.; Drouin, D.; Landstreet, J. D.; Monin, D. (2007). "A search for strong, ordered magnetic fields in Herbig Ae/Be stars".Monthly Notices of the Royal Astronomical Society.376(3): 1145–1161.arXiv:astro-ph/0701387.Bibcode:2007MNRAS.376.1145W.doi:10.1111/j.1365-2966.2007.11495.x.S2CID14156014.
  4. ^abcdGuzmán-Díaz, J.; Mendigutía, I.; Montesinos, B.; Oudmaijer, R. D.; Vioque, M.; Rodrigo, C.; Solano, E.; Meeus, G.; Marcos-Arenal, P. (2021), "Homogeneous study of Herbig Ae/Be stars from spectral energy distributions and Gaia EDR3",Astronomy & Astrophysics,650:A182,arXiv:2104.11759,Bibcode:2021A&A...650A.182G,doi:10.1051/0004-6361/202039519,S2CID233393918
  5. ^Grinin, V. P.; Kozlova, O. V.; Natta, A.; Ilyin, I.; Tuominen, I.; Rostopchina, A. N.; Shakhovskoy, D. N. (2001)."Optical spectra of five UX Orionis-type stars".Astronomy and Astrophysics.379(2): 482.Bibcode:2001A&A...379..482G.doi:10.1051/0004-6361:20011280.S2CID121844237.
  6. ^abMora, A.; Eiroa, C.; Natta, A.; Grady, C. A.; De Winter, D.; Davies, J. K.; Ferlet, R.; Harris, A. W.; Miranda, L. F.; Montesinos, B.; Oudmaijer, R. D.; Palacios, J.; Quirrenbach, A.; Rauer, H.; Alberdi, A.; Cameron, A.; Deeg, H. J.; Garzón, F.; Horne, K.; Merín, B.; Penny, A.; Schneider, J.; Solano, E.; Tsapras, Y.; Wesselius, P. R. (2004). "Dynamics of the circumstellar gas in the Herbig Ae stars BF Orionis, SV Cephei, WW Vulpeculae and XY Persei".Astronomy & Astrophysics.419:225–240.arXiv:astro-ph/0402614.Bibcode:2004A&A...419..225M.doi:10.1051/0004-6361:20040096.S2CID17149403.
  7. ^Testi, L.; Palla, F.; Natta, A. (1998). "The onset of cluster formation around Herbig Ae/Be stars".arXiv:astro-ph/9811210.
  8. ^Shevchenko, V. S.; Ezhkova, O. V. (2001). "Long-Term Cyclicity of the Herbig Ae Star BF Ori: Giant Protocomets and Accretion from a Protoplanetary Disk".Astronomy Letters.27(1): 39.Bibcode:2001AstL...27...39S.doi:10.1134/1.1336861.S2CID121443217.
  9. ^Marconi, M.; Ripepi, V.; Alcala', J. M.; Covino, E.; Palla, F.; Terranegra, L. (2000). "Pulsation in two Herbig Ae stars: HD 35929 and V351 Ori".Astronomy and Astrophysics.355.arXiv:astro-ph/0002466.Bibcode:2000A&A...355L..35M.
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