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| Query : 2014MNRAS.438L..11B |
2014MNRAS.438L..11B - Mon. Not. R. Astron. Soc., 438, L11-L15 (2014/February-2)
A lithium depletion boundary age of 21Myr for the Beta Pictoris moving group.
BINKS A.S. and JEFFRIES R.D.
Abstract (from CDS):
Optical spectroscopy is used to confirm membership for eight low-mass candidates in the young Beta Pic moving group (BPMG) via their radial velocities, chromospheric activity and kinematic parallaxes. We searched for the presence of the Lii 6708Å resonance feature and combined the results with literature measurements of other BPMG members to find the age-dependent lithium depletion boundary (LDB) - the luminosity at which Li remains unburned in a coeval group. The LDB age of the BPMG is 21±4Myr and insensitive to the choice of low-mass evolutionary models. This age is more precise, likely to be more accurate, and much older than that commonly assumed for the BPMG. As a result, substellar and planetary companions of BPMG members will be more massive than previously thought.
Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s): stars: kinematics and dynamics - stars: late-type - stars: pre-main sequence - open clusters and associations: individual: Beta Pictoris - solar neighbourhood
Simbad objects: 16
| Number of rows : 16 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Barta 161 12 | SB* | 01 35 13.9246297464 | -07 12 51.457318884 | 14.93 | 13.43 | 13.053 | 10.52 | M4.3V | 90 | 0 | |
| 2 | PM J02179+1225 | PM* | 02 17 56.0207444208 | +12 25 26.421675420 | 14.088 | 13.728 | dM4.0 | 26 | 0 | |||
| 3 | LP 476-207 | SB* | 05 01 58.79419 | +09 58 59.2855 | 12.93 | 11.53 | 10.33 | 8.708 | M3.5V | 120 | 0 | |
| 4 | UCAC4 345-006842 | LM* | 05 08 27.2958745944 | -21 01 44.375576844 | 15.940 | 14.665 | 14.582 | M5 | 51 | 0 | ||
| 5 | PM J05243-1601 | ** | 05 24 19.136688 | -16 01 15.27024 | 15.17 | 13.57 | 13.29 | M4.5 | 36 | 0 | ||
| 6 | RX J0534.0-0221 | PM* | 05 33 59.8219468272 | -02 21 32.384682504 | 13.91 | 12.42 | 12.04 | 9.897 | M3 | 44 | 0 | |
| 7 | M 36 | OpC | 05 36 19.8 | +34 08 02 | 6.09 | 6.0 | ~ | 206 | 2 | |||
| 8 | * bet Pic | PM* | 05 47 17.0876901 | -51 03 59.441135 | 4.13 | 4.03 | 3.86 | 3.74 | 3.58 | A6V | 2087 | 1 |
| 9 | * bet Pic b | Pl | 05 47 17.0876901 | -51 03 59.441135 | ~ | 627 | 1 | |||||
| 10 | NAME AB Dor Moving Group | MGr | 06 38 53.4 | -42 50 04 | ~ | 540 | 0 | |||||
| 11 | NGC 2547 | OpC | 08 10 01.5 | -49 12 08 | ~ | 445 | 0 | |||||
| 12 | NAME beta Pic Moving Group | MGr | 14 30 | -42.0 | ~ | 894 | 0 | |||||
| 13 | ASAS J164301-1754.4 | PM* | 16 43 01.2949583448 | -17 54 27.513130104 | 13.99 | 12.63 | 12.176 | 10.601 | M0.5 | 36 | 0 | |
| 14 | IC 4665 | OpC | 17 46 04.0 | +05 36 54 | ~ | 407 | 0 | |||||
| 15 | V* PZ Tel | BY* | 18 53 05.8735056984 | -50 10 49.897437168 | 9.22 | 8.342 | 7.464 | G9IV | 364 | 0 | ||
| 16 | RX J1910.4-2319 | ** | 19 10 28.204872 | -23 19 48.45612 | 14.755 | 13.222 | 12.920 | M4 | 24 | 0 |
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