Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/230858
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Título

Close galaxy pairs with accurate photometric redshifts

AutorRodríguez, Facundo; González, Elisabeth Johana; O'Mill, A. L.; Gaztañaga, Enrique CSIC ORCID; Fosalba, Pablo CSIC ORCID; Lambas, D. G.; Mezcua, Mar CSIC ORCID; Siudek, Malgorzata CSIC ORCID
Palabras claveGalaxies: groups: general
Galaxies: halos
Gravitational lensing: weak
Fecha de publicación21-feb-2020
EditorEDP Sciences
CitaciónAstronomy and Astrophysics 634: A123 (2020)
ResumenContext. Studies of galaxy pairs can provide valuable information to jointly understand the formation and evolution of galaxies and galaxy groups. Consequently, taking the new high-precision photo-z surveys into account, it is important to have reliable and tested methods that allow us to properly identify these systems and estimate their total masses and other properties. Aims. In view of the forthcoming Physics of the Accelerating Universe Survey (PAUS), we propose and evaluate the performance of an identification algorithm of projected close isolated galaxy pairs. We expect that the photometrically selected systems can adequately reproduce the observational properties and the inferred lensing mass-luminosity relation of a pair of truly bound galaxies that are hosted by the same dark matter halo. Methods. We developed an identification algorithm that considers the projected distance between the galaxies, the projected velocity difference, and an isolation criterion in order to restrict the sample to isolated systems. We applied our identification algorithm using a mock galaxy catalog that mimics the features of PAUS. To evaluate the feasibility of our pair finder, we compared the identified photometric samples with a test sample that considers that both members are included in the same halo. Taking advantage of the lensing properties provided by the mock catalog, we also applied a weak-lensing analysis to determine the mass of the selected systems. Results. Photometrically selected samples tend to show high purity values, but tend to misidentify truly bounded pairs as the photometric redshift errors increase. Nevertheless, overall properties such as the luminosity and mass distributions are successfully reproduced. We also accurately reproduce the lensing mass-luminosity relation as expected for galaxy pairs located in the same halo.
Versión del editorhttp://doi.org/10.1051/0004-6361/201937215
URIhttp://hdl.handle.net/10261/230858
DOI10.1051/0004-6361/201937215
Identificadoresdoi: 10.1051/0004-6361/201937215
issn: 1432-0746
Aparece en las colecciones: (ICE) Artículos




Ficheros en este ítem:
Fichero Descripción Tamaño Formato
Close_galaxy_pair_with_accurate_photometric_redshifts.pdf1,05 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo

CORE Recommender

SCOPUSTM   
Citations

7
checked on 24-mar-2024

WEB OF SCIENCETM
Citations

6
checked on 27-feb-2024

Page view(s)

84
checked on 29-mar-2024

Download(s)

54
checked on 29-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.