We have discovered a highly significant overdensity of galaxies at z = 2.300 +/- 0.015 in the course of a redshift survey designed to select star-forming galaxies in the redshift range z = 2.3 +/- 0.4 in the field of the bright z = 2.72 QSO HS 1700+643. The structure has a redshift-space galaxy overdensity of delta(z)(g)similar or equal to 7 and an estimated matter overdensity in real space of delta(m) similar or equal to 1.8, indicating that it will virialize by z similar to 0 with a mass scale of similar or equal to 1.4; 10(15) M-circle dot, that of a rich galaxy cluster. Detailed modeling of the spectral energy distribution - from the rest-frame far-UV to the rest-frame near-IR-of the 72 spectroscopically confirmed galaxies in this field for which we have obtained K-s and Spitzer IRAC photometry allows for a first direct comparison of galaxy properties as a function of large-scale environment at high redshift. We find that galaxies in the protocluster environment have mean stellar masses and inferred ages that are similar to 2 times larger (at z = 2.30) than identically UV-selected galaxies outside of the structure, and we show that this is consistent with simple theoretical expectations for the acceleration of structure formation in a region that is overdense on large scales by the observed amount. The protocluster environment contains a significant number of galaxies that already appear old, with large stellar masses (> 10(11) M-circle dot), by z = 2.3.
机构:
Univ Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, FranceUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
Legrand, L.
Hernandez-Monteagudo, C.
论文数: 0引用数: 0
h-index: 0
机构:
Ctr Estudios Fis Cosmos Aragon CEFCA, Unidad Asociada CSIC, Plaza San Juan 1,Planta 2, Teruel 44001, SpainUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
Hernandez-Monteagudo, C.
论文数: 引用数:
h-index:
机构:
Douspis, M.
Aghanim, N.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, FranceUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
Aghanim, N.
Angulo, Raul E.
论文数: 0引用数: 0
h-index: 0
机构:
Donostia Int Phys Ctr DIPC, Paseo Manuel de Lardizabal 4, Donostia San Sebastian 20018, Spain
Basque Fdn Sci, IKERBASQUE, Bilbao 48013, SpainUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
机构:
Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, NetherlandsLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Matthee, Jorryt
Sobral, David
论文数: 0引用数: 0
h-index: 0
机构:
Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Univ Lisbon, Inst Astrofis & Ciencias Espaco, OAL, P-1349018 Lisbon, Portugal
Univ Lancaster, Dept Phys, Lancaster LA1 4YB, EnglandLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Sobral, David
Oteo, Ivan
论文数: 0引用数: 0
h-index: 0
机构:
Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland
European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, GermanyLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Oteo, Ivan
Best, Philip
论文数: 0引用数: 0
h-index: 0
机构:
Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, ScotlandLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Best, Philip
Smail, Ian
论文数: 0引用数: 0
h-index: 0
机构:
Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, EnglandLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Smail, Ian
Rottgering, Huub
论文数: 0引用数: 0
h-index: 0
机构:
Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, NetherlandsLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
机构:
Univ Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, FranceUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
Legrand, L.
Hernandez-Monteagudo, C.
论文数: 0引用数: 0
h-index: 0
机构:
Ctr Estudios Fis Cosmos Aragon CEFCA, Unidad Asociada CSIC, Plaza San Juan 1,Planta 2, Teruel 44001, SpainUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
Hernandez-Monteagudo, C.
论文数: 引用数:
h-index:
机构:
Douspis, M.
Aghanim, N.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, FranceUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
Aghanim, N.
Angulo, Raul E.
论文数: 0引用数: 0
h-index: 0
机构:
Donostia Int Phys Ctr DIPC, Paseo Manuel de Lardizabal 4, Donostia San Sebastian 20018, Spain
Basque Fdn Sci, IKERBASQUE, Bilbao 48013, SpainUniv Paris Saclay, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France
机构:
Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, NetherlandsLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Matthee, Jorryt
Sobral, David
论文数: 0引用数: 0
h-index: 0
机构:
Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Univ Lisbon, Inst Astrofis & Ciencias Espaco, OAL, P-1349018 Lisbon, Portugal
Univ Lancaster, Dept Phys, Lancaster LA1 4YB, EnglandLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Sobral, David
Oteo, Ivan
论文数: 0引用数: 0
h-index: 0
机构:
Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland
European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, GermanyLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Oteo, Ivan
Best, Philip
论文数: 0引用数: 0
h-index: 0
机构:
Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, ScotlandLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Best, Philip
Smail, Ian
论文数: 0引用数: 0
h-index: 0
机构:
Univ Durham, Dept Phys, Ctr Extragalact Astron, South Rd, Durham DH1 3LE, EnglandLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
Smail, Ian
Rottgering, Huub
论文数: 0引用数: 0
h-index: 0
机构:
Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, NetherlandsLeiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands