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Star-formation histories of local luminous infrared galaxies

Pereira-Santaella, Miguel and Alonso-Herrero, Almudena and Colina, Luis and Miralles-Caballero, Daniel and Pérez-González, Pablo G. and Arribas, Santiago and Bellocchi, Enrica and Cazzoli, Sara and Díaz-Santos, Tanio and López, Javier Piqueras (2015) Star-formation histories of local luminous infrared galaxies. Astronomy and Astrophysics, 577 . Art. No. A78. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20150811-103146384

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Abstract

We present analysis of the integrated spectral energy distribution (SED) from the ultraviolet (UV) to the far-infrared and Hα of a sample of 29 local systems and individual galaxies with infrared (IR) luminosities between 10^(11)L⊙ and 10^(11.8)L⊙. We combined new narrow-band Hα + [N II] and broad-band g, r optical imaging taken with the Nordic Optical Telescope (NOT), with archival GALEX, 2MASS, Spitzer, and Herschel data. Their SEDs(photometry and integrated Hα flux) were fitted simultaneously with a modified version of the MAGPHYS code using stellar population synthesis models for the UV–near-IR range and thermal emission models for the IR emission taking the energy balance between the absorbed and re-emitted radiation into account. From the SED fits, we derive the star-formation histories (SFH) of these galaxies. For nearly half of them, the star-formation rate appears to be approximately constant during the last few Gyr. In the other half, the current star-formation rate seems to be enhanced by a factor of 3–20 with respect to what occurred ~1 Gyr ago. Objects with constant SFH tend to be more massive than starbursts, and they are compatible with the expected properties of a main-sequence (M-S) galaxy. Likewise, the derived SFHs show that all our objects were M-S galaxies ~1 Gyr ago with stellar masses between 10^(10.1) and 10^(11.5) M⊙. We also derived the average extinction (A_v = 0.6−3 mag) and the polycyclic aromatic hydrocarbon luminosity to L_(IR) ratio (0.03−0.16) from our fits. We combined the Av with the total IR and Hα luminosities into a diagramthat can be used to identify objects with rapidly changing (increasing or decreasing) SFR during the past 100 Myr.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201425359DOIArticle
http://www.aanda.org/articles/aa/abs/2015/05/aa25359-14/aa25359-14.htmlPublisherArticle
http://arxiv.org/abs/1502.07965arXivDiscussion Paper
ORCID:
AuthorORCID
Pereira-Santaella, Miguel0000-0002-4005-9619
Alonso-Herrero, Almudena0000-0001-6794-2519
Colina, Luis0000-0002-9090-4227
Pérez-González, Pablo G.0000-0003-4528-5639
Arribas, Santiago0000-0001-7997-1640
Díaz-Santos, Tanio0000-0003-0699-6083
Additional Information:© 2015 ESO. Article published by EDP Sciences. Received 18 November 2014; Accepted 16 February 2015; Published online 6 May 2015. We thank the anonymous referee for comments and suggestions. We also thank the Nordic Optical Telescope and Isaac Newton Group staff for their support during the observations. We acknowledge support from the Spanish Plan Nacional de Astronomía y Astrofísica through grants AYA2010-21161-C02-1, AYA2010-21887-C04-03, AYA2012-32295, AYA2012-31447, AYA2012-31277, and AYA2012-39408-C02-01. Based on observations made with the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain, of the Instituto de Astrofisica de Canarias. The data presented here were obtained in part with ALFOSC, which is provided by the Instituto de Astrofisica de Andalucia (IAA) under a joint agreement with the University of Copenhagen and NOTSA. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Funders:
Funding AgencyGrant Number
Nacional de Astronomía y AstrofísicaAYA2010-21161-C02-1
Nacional de Astronomía y AstrofísicaAYA2010-21887-C04-03
Nacional de Astronomía y AstrofísicaAYA2012-32295
Nacional de Astronomía y AstrofísicaAYA2012-31447
Nacional de Astronomía y AstrofísicaAYA2012-31277
Nacional de Astronomía y AstrofísicaAYA2012-39408-C02-01
Subject Keywords:galaxies: evolution – galaxies: starburst – galaxies: star formation
Record Number:CaltechAUTHORS:20150811-103146384
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150811-103146384
Official Citation:Miguel Pereira-Santaella, Almudena Alonso-Herrero, Luis Colina, Daniel Miralles-Caballero, Pablo G. Pérez-González, Santiago Arribas, Enrica Bellocchi, Sara Cazzoli, Tanio Díaz-Santos and Javier Piqueras López A&A 577 A78 (2015)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59391
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Aug 2015 17:53
Last Modified:09 Mar 2020 13:19

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