BF Antliae

BF Antliae

A light curve for BF Antliae, plotted from TESS data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 09h 56m 54.09215s[2]
Declination −27° 28′ 30.5575″[2]
Apparent magnitude (V) 6.32 (+0.01)[3]
Characteristics
Spectral type A4 V[3]
B−V color index 0.173±0.008[4]
Variable type δ Sct[3]
Astrometry
Radial velocity (Rv)+18.2±0.8[5] km/s
Proper motion (μ) RA: −72.627[2] mas/yr
Dec.: +23.234[2] mas/yr
Parallax (π)6.8977 ± 0.0578 mas[2]
Distance473 ± 4 ly
(145 ± 1 pc)
Absolute magnitude (MV)0.33[4]
Details[6]
Mass2.41±0.05 M☉
Luminosity66.8+11.7
−10.0 L☉
Temperature7,745+53
−71 K
Rotational velocity (v sin i)218.9±1.7[7] km/s
Other designations
BF Ant, CD−26° 7551, HD 86301, HIP 48776, HR 3933, SAO 178216[8]
Database references
SIMBADdata

BF Antliae, or HD 86301, is a variable star in the southern constellation of Antlia. It has a baseline apparent visual magnitude of 6.32,[3] which indicates it lies near the lower limit of naked eye visibility for faint stars. The distance to BF Ant, as determined from its annual parallax shift of 6.9 mas,[2] is 473 light years. It is moving further away with a heliocentric radial velocity of +18 km/s.[5]

In 2002, Gerald Handler and Robert R. Shobbrook discovered that the brightness of the star varies.[9] It was given its variable star designation, BF Antliae, in 2006.[10] It is an A-type main-sequence star with a stellar classification of A4 V[3] that is at the end of its main sequence lifespan.[6] It is a Delta Scuti variable that varies by 0.01 of a magnitude.[3] These are short-period (six hours at most) pulsating stars that have been used as standard candles and as subjects to study astroseismology.[11] Handler and Shobbrook noted that the star lies near the "hot luminous border of the δ Scuti instability strip", and it appears "multiperiodic with a time scale of 3.8–6 hours".[9]

BF Antliae is spinning rapidly with a projected rotational velocity of 219 km/s.[7] It has 2.41 times the mass of the Sun and is radiating 67 times the Sun's luminosity from its photosphere at an effective temperature of 7,745 K.[6]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference chang was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Zorec2012 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Díaz2011 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Handler2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Kazarovets was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Templeton2010 was invoked but never defined (see the help page).