THE RED SEQUENCE AT BIRTH IN THE GALAXY CLUSTER Cl J1449+0856 AT z = 2
ABSTRACT We use Hubble Space Telescope/WFC3 imaging to study the red population in the IR-selected, X-ray detected, low-mass cluster Cl J1449+0856 at z = 2, one of the few bona fide established clusters discovered at this redshift, and likely a typical progenitor of an average massive cluster today....
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| Veröffentlicht in: | Astrophysical journal. Letters 2016-12, Vol.833 (2), p.L20-L20 |
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| creator | Strazzullo, V. Daddi, E. Gobat, R. Valentino, F. Pannella, M. Dickinson, M. Renzini, A. Brammer, G. Onodera, M. Finoguenov, A. Cimatti, A. Carollo, C. M. Arimoto, N. |
| description | ABSTRACT We use Hubble Space Telescope/WFC3 imaging to study the red population in the IR-selected, X-ray detected, low-mass cluster Cl J1449+0856 at z = 2, one of the few bona fide established clusters discovered at this redshift, and likely a typical progenitor of an average massive cluster today. This study explores the presence and significance of an early red sequence in the core of this structure, investigating the nature of red-sequence galaxies, highlighting environmental effects on cluster galaxy populations at high redshift, and at the same time underlining similarities and differences with other distant dense environments. Our results suggest that the red population in the core of Cl J1449+0856 is made of a mixture of quiescent and dusty star-forming galaxies, with a seedling of the future red sequence already growing in the very central cluster region, and already characterizing the inner cluster core with respect to lower-density environments. On the other hand, the color-magnitude diagram of this cluster is definitely different from that of lower-redshift z 1 clusters, as well as of some rare particularly evolved massive clusters at similar redshift, and it is suggestive of a transition phase between active star formation and passive evolution occurring in the protocluster and established lower-redshift cluster regimes. |
| doi_str_mv | 10.3847/2041-8213/833/2/L20 |
| format | Article |
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M. ; Arimoto, N.</creator><creatorcontrib>Strazzullo, V. ; Daddi, E. ; Gobat, R. ; Valentino, F. ; Pannella, M. ; Dickinson, M. ; Renzini, A. ; Brammer, G. ; Onodera, M. ; Finoguenov, A. ; Cimatti, A. ; Carollo, C. M. ; Arimoto, N.</creatorcontrib><description>ABSTRACT We use Hubble Space Telescope/WFC3 imaging to study the red population in the IR-selected, X-ray detected, low-mass cluster Cl J1449+0856 at z = 2, one of the few bona fide established clusters discovered at this redshift, and likely a typical progenitor of an average massive cluster today. This study explores the presence and significance of an early red sequence in the core of this structure, investigating the nature of red-sequence galaxies, highlighting environmental effects on cluster galaxy populations at high redshift, and at the same time underlining similarities and differences with other distant dense environments. Our results suggest that the red population in the core of Cl J1449+0856 is made of a mixture of quiescent and dusty star-forming galaxies, with a seedling of the future red sequence already growing in the very central cluster region, and already characterizing the inner cluster core with respect to lower-density environments. On the other hand, the color-magnitude diagram of this cluster is definitely different from that of lower-redshift z 1 clusters, as well as of some rare particularly evolved massive clusters at similar redshift, and it is suggestive of a transition phase between active star formation and passive evolution occurring in the protocluster and established lower-redshift cluster regimes.</description><identifier>ISSN: 2041-8205</identifier><identifier>EISSN: 2041-8213</identifier><identifier>DOI: 10.3847/2041-8213/833/2/L20</identifier><language>eng</language><publisher>United States: The American Astronomical Society</publisher><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Clusters ; COLOR ; DENSITY ; EVOLUTION ; Galactic clusters ; GALAXIES ; galaxies: clusters: individual (Cl J1449+0856) ; galaxies: evolution ; galaxies: high-redshift ; GALAXY CLUSTERS ; MASS ; MIXTURES ; PHASE TRANSFORMATIONS ; Progenitors (astrophysics) ; RED SHIFT ; SPACE ; SPACE VEHICLES ; Star clusters ; Star formation ; STARS ; Stellar evolution ; TELESCOPES ; X RADIATION</subject><ispartof>Astrophysical journal. 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M.</creatorcontrib><creatorcontrib>Arimoto, N.</creatorcontrib><title>THE RED SEQUENCE AT BIRTH IN THE GALAXY CLUSTER Cl J1449+0856 AT z = 2</title><title>Astrophysical journal. Letters</title><addtitle>APJL</addtitle><addtitle>Astrophys. J. Lett</addtitle><description>ABSTRACT We use Hubble Space Telescope/WFC3 imaging to study the red population in the IR-selected, X-ray detected, low-mass cluster Cl J1449+0856 at z = 2, one of the few bona fide established clusters discovered at this redshift, and likely a typical progenitor of an average massive cluster today. This study explores the presence and significance of an early red sequence in the core of this structure, investigating the nature of red-sequence galaxies, highlighting environmental effects on cluster galaxy populations at high redshift, and at the same time underlining similarities and differences with other distant dense environments. Our results suggest that the red population in the core of Cl J1449+0856 is made of a mixture of quiescent and dusty star-forming galaxies, with a seedling of the future red sequence already growing in the very central cluster region, and already characterizing the inner cluster core with respect to lower-density environments. 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M.</au><au>Arimoto, N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>THE RED SEQUENCE AT BIRTH IN THE GALAXY CLUSTER Cl J1449+0856 AT z = 2</atitle><jtitle>Astrophysical journal. Letters</jtitle><stitle>APJL</stitle><addtitle>Astrophys. J. Lett</addtitle><date>2016-12-20</date><risdate>2016</risdate><volume>833</volume><issue>2</issue><spage>L20</spage><epage>L20</epage><pages>L20-L20</pages><issn>2041-8205</issn><eissn>2041-8213</eissn><abstract>ABSTRACT We use Hubble Space Telescope/WFC3 imaging to study the red population in the IR-selected, X-ray detected, low-mass cluster Cl J1449+0856 at z = 2, one of the few bona fide established clusters discovered at this redshift, and likely a typical progenitor of an average massive cluster today. This study explores the presence and significance of an early red sequence in the core of this structure, investigating the nature of red-sequence galaxies, highlighting environmental effects on cluster galaxy populations at high redshift, and at the same time underlining similarities and differences with other distant dense environments. Our results suggest that the red population in the core of Cl J1449+0856 is made of a mixture of quiescent and dusty star-forming galaxies, with a seedling of the future red sequence already growing in the very central cluster region, and already characterizing the inner cluster core with respect to lower-density environments. On the other hand, the color-magnitude diagram of this cluster is definitely different from that of lower-redshift z 1 clusters, as well as of some rare particularly evolved massive clusters at similar redshift, and it is suggestive of a transition phase between active star formation and passive evolution occurring in the protocluster and established lower-redshift cluster regimes.</abstract><cop>United States</cop><pub>The American Astronomical Society</pub><doi>10.3847/2041-8213/833/2/L20</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0003-3738-3976</orcidid><orcidid>https://orcid.org/0000-0003-3228-7264</orcidid><orcidid>https://orcid.org/0000-0003-1624-7609</orcidid><orcidid>https://orcid.org/0000-0002-4606-5403</orcidid><orcidid>https://orcid.org/0000-0002-4409-5633</orcidid><orcidid>https://orcid.org/0000-0002-3331-9590</orcidid><orcidid>https://orcid.org/0000-0003-2680-005X</orcidid><orcidid>https://orcid.org/0000-0001-7975-2894</orcidid><orcidid>https://orcid.org/0000-0003-0121-6113</orcidid><orcidid>https://orcid.org/0000-0001-6477-4011</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Clusters COLOR DENSITY EVOLUTION Galactic clusters GALAXIES galaxies: clusters: individual (Cl J1449+0856) galaxies: evolution galaxies: high-redshift GALAXY CLUSTERS MASS MIXTURES PHASE TRANSFORMATIONS Progenitors (astrophysics) RED SHIFT SPACE SPACE VEHICLES Star clusters Star formation STARS Stellar evolution TELESCOPES X RADIATION |
| title | THE RED SEQUENCE AT BIRTH IN THE GALAXY CLUSTER Cl J1449+0856 AT z = 2 |
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