A new very cool white dwarf discovered by the Sloan Digital Sky Survey

Hugh C. Harris, Brad M S Hansen, James Liebert, Daniel E. Vanden Berk, Scott F. Anderson, G. R. Knapp, Xiaohui Fan, Bruce Margon, Jeffrey A. Munn, R. C. Nichol, Jeffrey R. Pier, Donald P. Schneider, J. Allyn Smith, D. E. Winget, Donald G. York, John E. Anderson, J. Brinkmann, Scott Burles, Bing Chen, A. J. ConnollyIstván Csabai, Joshua A. Frieman, James E. Gunn, G. S. Hennessy, Robert B. Hindsley, Željko Ivezić, Stephen Kent, D. Q. Lamb, Robert H. Lupton, Heidi Jo Newberg, David J. Schlegel, Stephen Smee, Michael A. Strauss, Anirudda R. Thakar, Alan Uomoto, Brian Yanny

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Early data taken during commissioning of the Sloan Digital Sky Survey (SDSS) have resulted in the discovery of a very cool white dwarf. It appears to have stronger collision-induced absorption from molecular hydrogen than any other known white dwarf, suggesting it has a cooler temperature than any other. While its distance is presently unknown, it has a surprisingly small proper motion, making it unlikely to be a halo star. An analysis of white dwarf cooling times suggests that this object may be a low-mass star with a helium core. The SDSS imaging and spectroscopy also recovered LHS 3250, the coolest previously known white dwarf, indicating that the SDSS will be an effective tool for identifying these extreme objects.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume549
Issue number1 PART 2
DOIs
StatePublished - Mar 1 2001
Externally publishedYes

Fingerprint

stars
proper motion
coolers
helium
halos
collision
spectroscopy
hydrogen
cooling
collisions
temperature
analysis

Keywords

  • Stars: Atmospheres
  • white dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Harris, H. C., Hansen, B. M. S., Liebert, J., Vanden Berk, D. E., Anderson, S. F., Knapp, G. R., ... Yanny, B. (2001). A new very cool white dwarf discovered by the Sloan Digital Sky Survey. Astrophysical Journal, 549(1 PART 2). https://doi.org/10.1086/319146

A new very cool white dwarf discovered by the Sloan Digital Sky Survey. / Harris, Hugh C.; Hansen, Brad M S; Liebert, James; Vanden Berk, Daniel E.; Anderson, Scott F.; Knapp, G. R.; Fan, Xiaohui; Margon, Bruce; Munn, Jeffrey A.; Nichol, R. C.; Pier, Jeffrey R.; Schneider, Donald P.; Smith, J. Allyn; Winget, D. E.; York, Donald G.; Anderson, John E.; Brinkmann, J.; Burles, Scott; Chen, Bing; Connolly, A. J.; Csabai, István; Frieman, Joshua A.; Gunn, James E.; Hennessy, G. S.; Hindsley, Robert B.; Ivezić, Željko; Kent, Stephen; Lamb, D. Q.; Lupton, Robert H.; Newberg, Heidi Jo; Schlegel, David J.; Smee, Stephen; Strauss, Michael A.; Thakar, Anirudda R.; Uomoto, Alan; Yanny, Brian.

In: Astrophysical Journal, Vol. 549, No. 1 PART 2, 01.03.2001.

Research output: Contribution to journalArticle

Harris, HC, Hansen, BMS, Liebert, J, Vanden Berk, DE, Anderson, SF, Knapp, GR, Fan, X, Margon, B, Munn, JA, Nichol, RC, Pier, JR, Schneider, DP, Smith, JA, Winget, DE, York, DG, Anderson, JE, Brinkmann, J, Burles, S, Chen, B, Connolly, AJ, Csabai, I, Frieman, JA, Gunn, JE, Hennessy, GS, Hindsley, RB, Ivezić, Ž, Kent, S, Lamb, DQ, Lupton, RH, Newberg, HJ, Schlegel, DJ, Smee, S, Strauss, MA, Thakar, AR, Uomoto, A & Yanny, B 2001, 'A new very cool white dwarf discovered by the Sloan Digital Sky Survey', Astrophysical Journal, vol. 549, no. 1 PART 2. https://doi.org/10.1086/319146
Harris HC, Hansen BMS, Liebert J, Vanden Berk DE, Anderson SF, Knapp GR et al. A new very cool white dwarf discovered by the Sloan Digital Sky Survey. Astrophysical Journal. 2001 Mar 1;549(1 PART 2). https://doi.org/10.1086/319146
Harris, Hugh C. ; Hansen, Brad M S ; Liebert, James ; Vanden Berk, Daniel E. ; Anderson, Scott F. ; Knapp, G. R. ; Fan, Xiaohui ; Margon, Bruce ; Munn, Jeffrey A. ; Nichol, R. C. ; Pier, Jeffrey R. ; Schneider, Donald P. ; Smith, J. Allyn ; Winget, D. E. ; York, Donald G. ; Anderson, John E. ; Brinkmann, J. ; Burles, Scott ; Chen, Bing ; Connolly, A. J. ; Csabai, István ; Frieman, Joshua A. ; Gunn, James E. ; Hennessy, G. S. ; Hindsley, Robert B. ; Ivezić, Željko ; Kent, Stephen ; Lamb, D. Q. ; Lupton, Robert H. ; Newberg, Heidi Jo ; Schlegel, David J. ; Smee, Stephen ; Strauss, Michael A. ; Thakar, Anirudda R. ; Uomoto, Alan ; Yanny, Brian. / A new very cool white dwarf discovered by the Sloan Digital Sky Survey. In: Astrophysical Journal. 2001 ; Vol. 549, No. 1 PART 2.
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