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dc.contributor.author | López-Sanjuan, Carlos | - |
dc.contributor.author | Cenarro, A. J. | - |
dc.contributor.author | Hernández-Monteagudo, Carlos | - |
dc.contributor.author | Varela, Jesús | - |
dc.contributor.author | Molino, Alberto | - |
dc.contributor.author | Arnalte-Mur, P. | - |
dc.contributor.author | Ascaso, Begoña | - |
dc.contributor.author | Castander, Francisco J. | - |
dc.contributor.author | Fernández-Soto, Alberto | - |
dc.contributor.author | Huertas-Company, M. | - |
dc.contributor.author | Márquez, Isabel | - |
dc.contributor.author | Martínez, Vicente J. | - |
dc.contributor.author | Masegosa, Josefa | - |
dc.contributor.author | Moles, Mariano | - |
dc.contributor.author | Pović, Mirjana | - |
dc.contributor.author | Aguerri, J.A.L. | - |
dc.contributor.author | Alfaro, Emilio J. | - |
dc.contributor.author | Aparicio Villegas, Teresa | - |
dc.contributor.author | Benítez, Narciso | - |
dc.contributor.author | Broadhurst, Tom | - |
dc.contributor.author | Cabrera-Caño, Jesús | - |
dc.contributor.author | Cepa, Jordi | - |
dc.contributor.author | Cerviño, Miguel | - |
dc.contributor.author | Cristóbal-Hornillos, David | - |
dc.contributor.author | Olmo, Ascensión del | - |
dc.contributor.author | González Delgado, Rosa M. | - |
dc.contributor.author | Husillos, César | - |
dc.contributor.author | Infante, Leopoldo | - |
dc.contributor.author | Perea, Jaime | - |
dc.contributor.author | Prada, Francisco | - |
dc.contributor.author | Quintana, José María | - |
dc.date.accessioned | 2015-02-02T10:50:39Z | - |
dc.date.available | 2015-02-02T10:50:39Z | - |
dc.date.issued | 2014 | - |
dc.identifier | doi: 10.1051/0004-6361/201322474 | - |
dc.identifier | e-issn: 1432-0746 | - |
dc.identifier | issn: 0004-6361 | - |
dc.identifier.citation | Astronomy and Astrophysics 564: A127 (2014) | - |
dc.identifier.uri | http://hdl.handle.net/10261/110040 | - |
dc.description.abstract | [Aims]: Our goal is to estimate empirically the cosmic variance that affects merger fraction studies based on close pairs for the first time. [Methods]: We compute the merger fraction from photometric redshift close pairs with 10 h−1 kpc ≤ rp ≤ 50 h−1 kpc and Δv ≤ 500 km s−1 and measure it in the 48 sub-fields of the ALHAMBRA survey. We study the distribution of the measured merger fractions that follow a log-normal function and estimate the cosmic variance σv as the intrinsic dispersion of the observed distribution. We develop a maximum likelihood estimator to measure a reliable σv and avoid the dispersion due to the observational errors (including the Poisson shot noise term). [Results]: The cosmic variance σv of the merger fraction depends mainly on (i) the number density of the populations under study for both the principal (n1) and the companion (n2) galaxy in the close pair and (ii) the probed cosmic volume Vc. We do not find a significant dependence on either the search radius used to define close companions, the redshift, or the physical selection (luminosity or stellar mass) of the samples. Conclusions. We have estimated the cosmic variance that affects the measurement of the merger fraction by close pairs from observations. We provide a parametrisation of the cosmic variance with n1, n2, and Vc, σv α n-0.54 1 V-0.48 c (n2/n1)-0.37. Thanks to this prescription, future merger fraction studies based on close pairs could properly account for the cosmic variance on their results. © ESO 2014. | - |
dc.description.sponsorship | This work has mainly been funding by the FITE (Fondo de Inversiones de Teruel) and the projects AYA2006-14056 and CSD2007-00060. We also acknowledge the financial support from the Spanish grants AYA2010-15169, AYA2010-22111-C03-01 and AYA2010-22111-C03-02, from the Junta de Andalucia through TIC-114 and the Excellence Project P08-TIC-03531, and from the Generalitat Valenciana through the project Prometeo/2009/064. A.J.C. (RyC-2011-08529) and C.H. (RyC-2011-08262) are Ramón y Cajal fellows of the Spanish government. | - |
dc.publisher | EDP Sciences | - |
dc.relation.isversionof | Publisher's version | - |
dc.rights | openAccess | - |
dc.subject | Galaxies: fundamental parameters | - |
dc.subject | Galaxies: interactions | - |
dc.subject | Galaxies: statistics | - |
dc.title | The ALHAMBRA survey: An empirical estimation of the cosmic variance for merger fraction studies based on close pairs | - |
dc.type | artículo | - |
dc.identifier.doi | 10.1051/0004-6361/201322474 | - |
dc.relation.publisherversion | http://dx.doi.org/10.1051/0004-6361/201322474 | - |
dc.date.updated | 2015-02-02T10:50:39Z | - |
dc.description.version | Peer Reviewed | - |
dc.language.rfc3066 | eng | - |
dc.contributor.funder | Fondo de Inversiones de Teruel | - |
dc.contributor.funder | Ministerio de Economía y Competitividad (España) | - |
dc.contributor.funder | Junta de Andalucía | - |
dc.contributor.funder | Generalitat Valenciana | - |
dc.contributor.funder | Ministerio de Ciencia e Innovación (España) | - |
dc.identifier.funder | http://dx.doi.org/10.13039/501100003329 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100003359 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100004837 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100011011 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.fulltext | With Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
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fraction studies based on close pairs.pdf | 467,29 kB | Adobe PDF | Visualizar/Abrir |
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