A new detailed examination of white dwarfs in NGC 3532 and NGC 2287

P. D. Dobbie, R. Napiwotzki, M. R. Burleigh, K. A. Williams, R. Sharp, M. A. Barstow, S. L. Casewell, Ivan - Hubeny

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We present the results of a photometric and spectroscopic study of the white dwarf candidate members of the intermediate age open clusters NGC 3532 and NGC 2287. Of the nine objects investigated, it is determined that six are probable members of the clusters, four in NGC 3532 and two in NGC 2287. For these six white dwarfs, we use our estimates of their cooling times together with the cluster ages to constrain the lifetimes and masses of their progenitor stars. We examine the location of these objects in initial mass-final mass space and find that they now provide no evidence for substantial scatter in initial mass-final mass relation (IFMR) as suggested by previous investigations. Instead, we demonstrate that, when combined with current data from other solar metallicity open clusters and the Sirius binary system, they hint at an IFMR that is steeper in the initial mass range 3 M ≲ M init ≲ 4 M than at progenitor masses immediately lower and higher than this. This form is generally consistent with the predictions of stellar evolutionary models and can aid population synthesis models in reproducing the relatively sharp drop observed at the high mass end of the main peak in the mass distribution of white dwarfs.

Original languageEnglish (US)
Pages (from-to)2248-2256
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume395
Issue number4
DOIs
StatePublished - Jun 2009

Fingerprint

examination
open clusters
stellar models
mass distribution
metallicity
cooling
stars
life (durability)
synthesis
estimates
predictions
prediction

Keywords

  • Open clusters and associations: NGC 2287
  • Open clusters and associations: NGC 3532
  • White dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Dobbie, P. D., Napiwotzki, R., Burleigh, M. R., Williams, K. A., Sharp, R., Barstow, M. A., ... Hubeny, I. . (2009). A new detailed examination of white dwarfs in NGC 3532 and NGC 2287. Monthly Notices of the Royal Astronomical Society, 395(4), 2248-2256. https://doi.org/10.1111/j.1365-2966.2009.14688.x

A new detailed examination of white dwarfs in NGC 3532 and NGC 2287. / Dobbie, P. D.; Napiwotzki, R.; Burleigh, M. R.; Williams, K. A.; Sharp, R.; Barstow, M. A.; Casewell, S. L.; Hubeny, Ivan -.

In: Monthly Notices of the Royal Astronomical Society, Vol. 395, No. 4, 06.2009, p. 2248-2256.

Research output: Contribution to journalArticle

Dobbie, PD, Napiwotzki, R, Burleigh, MR, Williams, KA, Sharp, R, Barstow, MA, Casewell, SL & Hubeny, I 2009, 'A new detailed examination of white dwarfs in NGC 3532 and NGC 2287', Monthly Notices of the Royal Astronomical Society, vol. 395, no. 4, pp. 2248-2256. https://doi.org/10.1111/j.1365-2966.2009.14688.x
Dobbie, P. D. ; Napiwotzki, R. ; Burleigh, M. R. ; Williams, K. A. ; Sharp, R. ; Barstow, M. A. ; Casewell, S. L. ; Hubeny, Ivan -. / A new detailed examination of white dwarfs in NGC 3532 and NGC 2287. In: Monthly Notices of the Royal Astronomical Society. 2009 ; Vol. 395, No. 4. pp. 2248-2256.
@article{fb88d878f1584de388dec9b6b7939803,
title = "A new detailed examination of white dwarfs in NGC 3532 and NGC 2287",
abstract = "We present the results of a photometric and spectroscopic study of the white dwarf candidate members of the intermediate age open clusters NGC 3532 and NGC 2287. Of the nine objects investigated, it is determined that six are probable members of the clusters, four in NGC 3532 and two in NGC 2287. For these six white dwarfs, we use our estimates of their cooling times together with the cluster ages to constrain the lifetimes and masses of their progenitor stars. We examine the location of these objects in initial mass-final mass space and find that they now provide no evidence for substantial scatter in initial mass-final mass relation (IFMR) as suggested by previous investigations. Instead, we demonstrate that, when combined with current data from other solar metallicity open clusters and the Sirius binary system, they hint at an IFMR that is steeper in the initial mass range 3 M ⊙ ≲ M init ≲ 4 M ⊙ than at progenitor masses immediately lower and higher than this. This form is generally consistent with the predictions of stellar evolutionary models and can aid population synthesis models in reproducing the relatively sharp drop observed at the high mass end of the main peak in the mass distribution of white dwarfs.",
keywords = "Open clusters and associations: NGC 2287, Open clusters and associations: NGC 3532, White dwarfs",
author = "Dobbie, {P. D.} and R. Napiwotzki and Burleigh, {M. R.} and Williams, {K. A.} and R. Sharp and Barstow, {M. A.} and Casewell, {S. L.} and Hubeny, {Ivan -}",
year = "2009",
month = "6",
doi = "10.1111/j.1365-2966.2009.14688.x",
language = "English (US)",
volume = "395",
pages = "2248--2256",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "4",

}

TY - JOUR

T1 - A new detailed examination of white dwarfs in NGC 3532 and NGC 2287

AU - Dobbie, P. D.

AU - Napiwotzki, R.

AU - Burleigh, M. R.

AU - Williams, K. A.

AU - Sharp, R.

AU - Barstow, M. A.

AU - Casewell, S. L.

AU - Hubeny, Ivan -

PY - 2009/6

Y1 - 2009/6

N2 - We present the results of a photometric and spectroscopic study of the white dwarf candidate members of the intermediate age open clusters NGC 3532 and NGC 2287. Of the nine objects investigated, it is determined that six are probable members of the clusters, four in NGC 3532 and two in NGC 2287. For these six white dwarfs, we use our estimates of their cooling times together with the cluster ages to constrain the lifetimes and masses of their progenitor stars. We examine the location of these objects in initial mass-final mass space and find that they now provide no evidence for substantial scatter in initial mass-final mass relation (IFMR) as suggested by previous investigations. Instead, we demonstrate that, when combined with current data from other solar metallicity open clusters and the Sirius binary system, they hint at an IFMR that is steeper in the initial mass range 3 M ⊙ ≲ M init ≲ 4 M ⊙ than at progenitor masses immediately lower and higher than this. This form is generally consistent with the predictions of stellar evolutionary models and can aid population synthesis models in reproducing the relatively sharp drop observed at the high mass end of the main peak in the mass distribution of white dwarfs.

AB - We present the results of a photometric and spectroscopic study of the white dwarf candidate members of the intermediate age open clusters NGC 3532 and NGC 2287. Of the nine objects investigated, it is determined that six are probable members of the clusters, four in NGC 3532 and two in NGC 2287. For these six white dwarfs, we use our estimates of their cooling times together with the cluster ages to constrain the lifetimes and masses of their progenitor stars. We examine the location of these objects in initial mass-final mass space and find that they now provide no evidence for substantial scatter in initial mass-final mass relation (IFMR) as suggested by previous investigations. Instead, we demonstrate that, when combined with current data from other solar metallicity open clusters and the Sirius binary system, they hint at an IFMR that is steeper in the initial mass range 3 M ⊙ ≲ M init ≲ 4 M ⊙ than at progenitor masses immediately lower and higher than this. This form is generally consistent with the predictions of stellar evolutionary models and can aid population synthesis models in reproducing the relatively sharp drop observed at the high mass end of the main peak in the mass distribution of white dwarfs.

KW - Open clusters and associations: NGC 2287

KW - Open clusters and associations: NGC 3532

KW - White dwarfs

UR - http://www.scopus.com/inward/record.url?scp=66149191279&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=66149191279&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2009.14688.x

DO - 10.1111/j.1365-2966.2009.14688.x

M3 - Article

AN - SCOPUS:66149191279

VL - 395

SP - 2248

EP - 2256

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -