AB Doradus C: Age, spectral type, orbit, and comparison to evolutionary models

E. L. Nielsen, Laird M Close, J. C. Guirado, B. A. Biller, R. Lenzen, W. Brandner, M. Hartung, C. Lidman

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We expand upon the results of Close et al. (2005) regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spectral reduction and a new orbital solution with two additional epochs. Our improved analysis confirms our spectral type of M8 (± 1) and mass of 0.090 ± 0.003 M for AB Dor C. Comparing the results for AB Dor C with other young, low-mass objects with dynamical masses we find a general trend where current evolutionary models tend to over-predict the temperature (or under-predict the mass) for low-mass stars and brown dwarfs. Given our precision, there is a ∼99% chance that the mass of AB Dor C is underestimated by the DUSTY tracks in the HR diagram.

Original languageEnglish (US)
Pages (from-to)1033-1039
Number of pages7
JournalAstronomische Nachrichten
Volume326
Issue number10
DOIs
StatePublished - 2005

Fingerprint

orbits
Hertzsprung-Russell diagram
comparison
diagram
time measurement
calibration
trends
stars
orbitals
temperature
young

Keywords

  • Brown dwarfs
  • Infrared: stars
  • Stars: formation
  • Stars: individual (AB Dor)
  • Stars: low-mass
  • Stars: pre-main sequence

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Nielsen, E. L., Close, L. M., Guirado, J. C., Biller, B. A., Lenzen, R., Brandner, W., ... Lidman, C. (2005). AB Doradus C: Age, spectral type, orbit, and comparison to evolutionary models. Astronomische Nachrichten, 326(10), 1033-1039. https://doi.org/10.1002/asna.200510442

AB Doradus C : Age, spectral type, orbit, and comparison to evolutionary models. / Nielsen, E. L.; Close, Laird M; Guirado, J. C.; Biller, B. A.; Lenzen, R.; Brandner, W.; Hartung, M.; Lidman, C.

In: Astronomische Nachrichten, Vol. 326, No. 10, 2005, p. 1033-1039.

Research output: Contribution to journalArticle

Nielsen, EL, Close, LM, Guirado, JC, Biller, BA, Lenzen, R, Brandner, W, Hartung, M & Lidman, C 2005, 'AB Doradus C: Age, spectral type, orbit, and comparison to evolutionary models', Astronomische Nachrichten, vol. 326, no. 10, pp. 1033-1039. https://doi.org/10.1002/asna.200510442
Nielsen, E. L. ; Close, Laird M ; Guirado, J. C. ; Biller, B. A. ; Lenzen, R. ; Brandner, W. ; Hartung, M. ; Lidman, C. / AB Doradus C : Age, spectral type, orbit, and comparison to evolutionary models. In: Astronomische Nachrichten. 2005 ; Vol. 326, No. 10. pp. 1033-1039.
@article{18f648d6e9614783b2a671e1ee25b1d7,
title = "AB Doradus C: Age, spectral type, orbit, and comparison to evolutionary models",
abstract = "We expand upon the results of Close et al. (2005) regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spectral reduction and a new orbital solution with two additional epochs. Our improved analysis confirms our spectral type of M8 (± 1) and mass of 0.090 ± 0.003 M⊙ for AB Dor C. Comparing the results for AB Dor C with other young, low-mass objects with dynamical masses we find a general trend where current evolutionary models tend to over-predict the temperature (or under-predict the mass) for low-mass stars and brown dwarfs. Given our precision, there is a ∼99{\%} chance that the mass of AB Dor C is underestimated by the DUSTY tracks in the HR diagram.",
keywords = "Brown dwarfs, Infrared: stars, Stars: formation, Stars: individual (AB Dor), Stars: low-mass, Stars: pre-main sequence",
author = "Nielsen, {E. L.} and Close, {Laird M} and Guirado, {J. C.} and Biller, {B. A.} and R. Lenzen and W. Brandner and M. Hartung and C. Lidman",
year = "2005",
doi = "10.1002/asna.200510442",
language = "English (US)",
volume = "326",
pages = "1033--1039",
journal = "Astronomische Nachrichten",
issn = "0004-6337",
publisher = "Wiley-VCH Verlag",
number = "10",

}

TY - JOUR

T1 - AB Doradus C

T2 - Age, spectral type, orbit, and comparison to evolutionary models

AU - Nielsen, E. L.

AU - Close, Laird M

AU - Guirado, J. C.

AU - Biller, B. A.

AU - Lenzen, R.

AU - Brandner, W.

AU - Hartung, M.

AU - Lidman, C.

PY - 2005

Y1 - 2005

N2 - We expand upon the results of Close et al. (2005) regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spectral reduction and a new orbital solution with two additional epochs. Our improved analysis confirms our spectral type of M8 (± 1) and mass of 0.090 ± 0.003 M⊙ for AB Dor C. Comparing the results for AB Dor C with other young, low-mass objects with dynamical masses we find a general trend where current evolutionary models tend to over-predict the temperature (or under-predict the mass) for low-mass stars and brown dwarfs. Given our precision, there is a ∼99% chance that the mass of AB Dor C is underestimated by the DUSTY tracks in the HR diagram.

AB - We expand upon the results of Close et al. (2005) regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spectral reduction and a new orbital solution with two additional epochs. Our improved analysis confirms our spectral type of M8 (± 1) and mass of 0.090 ± 0.003 M⊙ for AB Dor C. Comparing the results for AB Dor C with other young, low-mass objects with dynamical masses we find a general trend where current evolutionary models tend to over-predict the temperature (or under-predict the mass) for low-mass stars and brown dwarfs. Given our precision, there is a ∼99% chance that the mass of AB Dor C is underestimated by the DUSTY tracks in the HR diagram.

KW - Brown dwarfs

KW - Infrared: stars

KW - Stars: formation

KW - Stars: individual (AB Dor)

KW - Stars: low-mass

KW - Stars: pre-main sequence

UR - http://www.scopus.com/inward/record.url?scp=29844445789&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=29844445789&partnerID=8YFLogxK

U2 - 10.1002/asna.200510442

DO - 10.1002/asna.200510442

M3 - Article

AN - SCOPUS:29844445789

VL - 326

SP - 1033

EP - 1039

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

SN - 0004-6337

IS - 10

ER -