eCite Digital Repository

New praesepe white dwarfs and the initial mass-final mass relation


Dobbie, PD and Napiwotzki, R and Burleigh, MR and Barstow, MA and Boyce, DD and Casewell, SL and Jameson, RF and Hubeny, I and Fontaine, G, New praesepe white dwarfs and the initial mass-final mass relation, Monthly Notices of the Royal Astronomical Society, 369, (1) pp. 383-389. ISSN 0035-8711 (2006) [Refereed Article]

Copyright Statement

Copyright 2006 the authors Journal compilation copyright RAS

DOI: doi:10.1111/j.1365-2966.2006.10311.x


We report the spectroscopic confirmation of four further white dwarf members of Praesepe. This brings the total number of confirmed white dwarf members to 11, making this the second largest collection of these objects in an open cluster identified to date. This number is consistent with the high-mass end of the initial mass function of Praesepe being Salpeter in form. Furthermore, it suggests that the bulk of Praesepe white dwarfs did not gain a substantial recoil kick velocity from possible asymmetries in their loss of mass during the asymptotic giant branch phase of evolution. By comparing our estimates of the effective temperatures and the surface gravities of WD0833+194, WD0840+190, WD0840+205 and WD0843+184 to modern theoretical evolutionary tracks, we have derived their masses to be in the range 0.72–0.76 M⊙ and their cooling ages ∼300 Myr. For an assumed cluster age of 625 ± 50 Myr, the inferred progenitor masses are between 3.3 and 3.5 M⊙. Examining these new data in the context of the initial mass–final mass relation, we find that it can be adequately represented by a linear function (a0= 0.289 ± 0.051, a1= 0.133 ± 0.015) over the initial mass range 2.7–6 M⊙. Assuming an extrapolation of this relation to larger initial masses is valid and adopting a maximum white dwarf mass of 1.3 M⊙, our results support a minimum mass for core-collapse supernovae progenitors in the range ∼6.8–8.6 M⊙.

Item Details

Item Type:Refereed Article
Keywords:supernovae: general; white dwarfs; open clusters and associations: individual: Praesepe
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Stellar astronomy and planetary systems
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Dobbie, PD (Dr Paul Dobbie)
ID Code:81093
Year Published:2006
Web of Science® Times Cited:94
Deposited By:Mathematics and Physics
Deposited On:2012-11-22
Last Modified:2013-06-26

Repository Staff Only: item control page