The 2df SDSS LRG and QSO survey: Evolution of the luminosity function of luminous red galaxies to z = 0.6

David A. Wake, Robert C. Nichol, Daniel J. Eisenstein, Jon Loveday, Alastair C. Edge, Russell Cannon, Ian Smail, Donald P. Schneider, Ryan Scranton, Daniel Carson, Nicholas P. Ross, Robert J. Brunner, Matthew Colless, Warrwick J. Couch, Scott M. Croom, Simon P. Driver, José Da Angela, Sebastian Jester, Roberto De Propris, Michael J. DrinkwaterJoss Bland-Hawthorn, Kevin A. Pimbblet, Isaac G. Roseboom, Tom Shanks, Robert G. Sharp, Jon Brinkmann

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Abstract

We present new measurements of the luminosity function (LF) of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) and the 2dF SDSS LRG and Quasar (2SLAQ) survey. We have carefully quantified, and corrected for, uncertainties in the K and evolutionary corrections, differences in the colour selection methods, and the effects of photometric errors, thus ensuring we are studying the same galaxy population in both surveys. Using a limited subset of 6326 SDSS LRGs (with 0.17 < z < 0.24) and 1725 2SLAQ LRGs (with 0.5 < z < 0.6), for which the matching colour selection is most reliable, we find no evidence for any additional evolution in the LRG LF, over this redshift range, beyond that expected from a simple passive evolution model. This lack of additional evolution is quantified using the comoving luminosity density of SDSS and 2SLAQ LRGs, brighter than M 0.2r- 5 log h 0.7 = -22.5, which are 2.51 ± 0.03 × 10-7L Mpc -3 and 2.44 ± 0.15 × 10-7L Mpc -3, respectively (< 10 per cent uncertainty). We compare our LFs to the COMBO-17 data and find excellent agreement over the same redshift range. Together, these surveys show no evidence for additional evolution (beyond passive) in the LF of LRGs brighter than M 0.2r - 5 log h 0.7 = -21 (or brighter than ∼L*). We test our SDSS and 2SLAQ LFs against a simple 'dry merger' model for the evolution of massive red galaxies and find that at least half of the LRGs at z ≃ 0.2 must already have been well assembled (with more than half their stellar mass) by z ≃ 0.6. This limit is barely consistent with recent results from semi-analytical models of galaxy evolution.

Original languageEnglish (US)
Pages (from-to)537-550
Number of pages14
JournalMonthly Notices of the Royal Astronomical Society
Volume372
Issue number2
DOIs
StatePublished - Oct 1 2006

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quasars
luminosity
galaxies
color
merger
stellar mass
set theory

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Wake, David A. ; Nichol, Robert C. ; Eisenstein, Daniel J. ; Loveday, Jon ; Edge, Alastair C. ; Cannon, Russell ; Smail, Ian ; Schneider, Donald P. ; Scranton, Ryan ; Carson, Daniel ; Ross, Nicholas P. ; Brunner, Robert J. ; Colless, Matthew ; Couch, Warrwick J. ; Croom, Scott M. ; Driver, Simon P. ; Da Angela, José ; Jester, Sebastian ; De Propris, Roberto ; Drinkwater, Michael J. ; Bland-Hawthorn, Joss ; Pimbblet, Kevin A. ; Roseboom, Isaac G. ; Shanks, Tom ; Sharp, Robert G. ; Brinkmann, Jon. / The 2df SDSS LRG and QSO survey : Evolution of the luminosity function of luminous red galaxies to z = 0.6. In: Monthly Notices of the Royal Astronomical Society. 2006 ; Vol. 372, No. 2. pp. 537-550.
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title = "The 2df SDSS LRG and QSO survey: Evolution of the luminosity function of luminous red galaxies to z = 0.6",
abstract = "We present new measurements of the luminosity function (LF) of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) and the 2dF SDSS LRG and Quasar (2SLAQ) survey. We have carefully quantified, and corrected for, uncertainties in the K and evolutionary corrections, differences in the colour selection methods, and the effects of photometric errors, thus ensuring we are studying the same galaxy population in both surveys. Using a limited subset of 6326 SDSS LRGs (with 0.17 < z < 0.24) and 1725 2SLAQ LRGs (with 0.5 < z < 0.6), for which the matching colour selection is most reliable, we find no evidence for any additional evolution in the LRG LF, over this redshift range, beyond that expected from a simple passive evolution model. This lack of additional evolution is quantified using the comoving luminosity density of SDSS and 2SLAQ LRGs, brighter than M 0.2r- 5 log h 0.7 = -22.5, which are 2.51 ± 0.03 × 10-7L ⊙ Mpc -3 and 2.44 ± 0.15 × 10-7L ⊙ Mpc -3, respectively (< 10 per cent uncertainty). We compare our LFs to the COMBO-17 data and find excellent agreement over the same redshift range. Together, these surveys show no evidence for additional evolution (beyond passive) in the LF of LRGs brighter than M 0.2r - 5 log h 0.7 = -21 (or brighter than ∼L*). We test our SDSS and 2SLAQ LFs against a simple 'dry merger' model for the evolution of massive red galaxies and find that at least half of the LRGs at z ≃ 0.2 must already have been well assembled (with more than half their stellar mass) by z ≃ 0.6. This limit is barely consistent with recent results from semi-analytical models of galaxy evolution.",
author = "Wake, {David A.} and Nichol, {Robert C.} and Eisenstein, {Daniel J.} and Jon Loveday and Edge, {Alastair C.} and Russell Cannon and Ian Smail and Schneider, {Donald P.} and Ryan Scranton and Daniel Carson and Ross, {Nicholas P.} and Brunner, {Robert J.} and Matthew Colless and Couch, {Warrwick J.} and Croom, {Scott M.} and Driver, {Simon P.} and {Da Angela}, Jos{\'e} and Sebastian Jester and {De Propris}, Roberto and Drinkwater, {Michael J.} and Joss Bland-Hawthorn and Pimbblet, {Kevin A.} and Roseboom, {Isaac G.} and Tom Shanks and Sharp, {Robert G.} and Jon Brinkmann",
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Wake, DA, Nichol, RC, Eisenstein, DJ, Loveday, J, Edge, AC, Cannon, R, Smail, I, Schneider, DP, Scranton, R, Carson, D, Ross, NP, Brunner, RJ, Colless, M, Couch, WJ, Croom, SM, Driver, SP, Da Angela, J, Jester, S, De Propris, R, Drinkwater, MJ, Bland-Hawthorn, J, Pimbblet, KA, Roseboom, IG, Shanks, T, Sharp, RG & Brinkmann, J 2006, 'The 2df SDSS LRG and QSO survey: Evolution of the luminosity function of luminous red galaxies to z = 0.6', Monthly Notices of the Royal Astronomical Society, vol. 372, no. 2, pp. 537-550. https://doi.org/10.1111/j.1365-2966.2006.10831.x

The 2df SDSS LRG and QSO survey : Evolution of the luminosity function of luminous red galaxies to z = 0.6. / Wake, David A.; Nichol, Robert C.; Eisenstein, Daniel J.; Loveday, Jon; Edge, Alastair C.; Cannon, Russell; Smail, Ian; Schneider, Donald P.; Scranton, Ryan; Carson, Daniel; Ross, Nicholas P.; Brunner, Robert J.; Colless, Matthew; Couch, Warrwick J.; Croom, Scott M.; Driver, Simon P.; Da Angela, José; Jester, Sebastian; De Propris, Roberto; Drinkwater, Michael J.; Bland-Hawthorn, Joss; Pimbblet, Kevin A.; Roseboom, Isaac G.; Shanks, Tom; Sharp, Robert G.; Brinkmann, Jon.

In: Monthly Notices of the Royal Astronomical Society, Vol. 372, No. 2, 01.10.2006, p. 537-550.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The 2df SDSS LRG and QSO survey

T2 - Evolution of the luminosity function of luminous red galaxies to z = 0.6

AU - Wake, David A.

AU - Nichol, Robert C.

AU - Eisenstein, Daniel J.

AU - Loveday, Jon

AU - Edge, Alastair C.

AU - Cannon, Russell

AU - Smail, Ian

AU - Schneider, Donald P.

AU - Scranton, Ryan

AU - Carson, Daniel

AU - Ross, Nicholas P.

AU - Brunner, Robert J.

AU - Colless, Matthew

AU - Couch, Warrwick J.

AU - Croom, Scott M.

AU - Driver, Simon P.

AU - Da Angela, José

AU - Jester, Sebastian

AU - De Propris, Roberto

AU - Drinkwater, Michael J.

AU - Bland-Hawthorn, Joss

AU - Pimbblet, Kevin A.

AU - Roseboom, Isaac G.

AU - Shanks, Tom

AU - Sharp, Robert G.

AU - Brinkmann, Jon

PY - 2006/10/1

Y1 - 2006/10/1

N2 - We present new measurements of the luminosity function (LF) of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) and the 2dF SDSS LRG and Quasar (2SLAQ) survey. We have carefully quantified, and corrected for, uncertainties in the K and evolutionary corrections, differences in the colour selection methods, and the effects of photometric errors, thus ensuring we are studying the same galaxy population in both surveys. Using a limited subset of 6326 SDSS LRGs (with 0.17 < z < 0.24) and 1725 2SLAQ LRGs (with 0.5 < z < 0.6), for which the matching colour selection is most reliable, we find no evidence for any additional evolution in the LRG LF, over this redshift range, beyond that expected from a simple passive evolution model. This lack of additional evolution is quantified using the comoving luminosity density of SDSS and 2SLAQ LRGs, brighter than M 0.2r- 5 log h 0.7 = -22.5, which are 2.51 ± 0.03 × 10-7L ⊙ Mpc -3 and 2.44 ± 0.15 × 10-7L ⊙ Mpc -3, respectively (< 10 per cent uncertainty). We compare our LFs to the COMBO-17 data and find excellent agreement over the same redshift range. Together, these surveys show no evidence for additional evolution (beyond passive) in the LF of LRGs brighter than M 0.2r - 5 log h 0.7 = -21 (or brighter than ∼L*). We test our SDSS and 2SLAQ LFs against a simple 'dry merger' model for the evolution of massive red galaxies and find that at least half of the LRGs at z ≃ 0.2 must already have been well assembled (with more than half their stellar mass) by z ≃ 0.6. This limit is barely consistent with recent results from semi-analytical models of galaxy evolution.

AB - We present new measurements of the luminosity function (LF) of luminous red galaxies (LRGs) from the Sloan Digital Sky Survey (SDSS) and the 2dF SDSS LRG and Quasar (2SLAQ) survey. We have carefully quantified, and corrected for, uncertainties in the K and evolutionary corrections, differences in the colour selection methods, and the effects of photometric errors, thus ensuring we are studying the same galaxy population in both surveys. Using a limited subset of 6326 SDSS LRGs (with 0.17 < z < 0.24) and 1725 2SLAQ LRGs (with 0.5 < z < 0.6), for which the matching colour selection is most reliable, we find no evidence for any additional evolution in the LRG LF, over this redshift range, beyond that expected from a simple passive evolution model. This lack of additional evolution is quantified using the comoving luminosity density of SDSS and 2SLAQ LRGs, brighter than M 0.2r- 5 log h 0.7 = -22.5, which are 2.51 ± 0.03 × 10-7L ⊙ Mpc -3 and 2.44 ± 0.15 × 10-7L ⊙ Mpc -3, respectively (< 10 per cent uncertainty). We compare our LFs to the COMBO-17 data and find excellent agreement over the same redshift range. Together, these surveys show no evidence for additional evolution (beyond passive) in the LF of LRGs brighter than M 0.2r - 5 log h 0.7 = -21 (or brighter than ∼L*). We test our SDSS and 2SLAQ LFs against a simple 'dry merger' model for the evolution of massive red galaxies and find that at least half of the LRGs at z ≃ 0.2 must already have been well assembled (with more than half their stellar mass) by z ≃ 0.6. This limit is barely consistent with recent results from semi-analytical models of galaxy evolution.

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