GOODS–Herschel: an infrared main sequence for star-forming galaxies
David Elbaz,Mark Dickinson,Ho Seong Hwang,Tanio Díaz-Santos,Georgios E. Magdis,Benjamin Magnelli,D. Le Borgne,Frédéric Galliano,Maurilio Pannella,P. Chanial,Lee Armus,Vassilis Charmandaris,Vassilis Charmandaris,Emanuele Daddi,Herve Aussel,P. Popesso,Jeyhan S. Kartaltepe,Bruno Altieri,Ivan Valtchanov,D. Coia,Helmut Dannerbauer,Kalliopi Dasyra,Roger Leiton,Roger Leiton,Joseph M. Mazzarella,David M. Alexander,V. Buat,Denis Burgarella,R.-R. Chary,Roberto Gilli,Rob Ivison,Rob Ivison,Stéphanie Juneau,E. Le Floc'h,Dieter Lutz,G. E. Morrison,James Mullaney,Eric J. Murphy,Alexandra Pope,Douglas Scott,Mark Brodwin,Daniela Calzetti,C. Cesarsky,Stéphane Charlot,Herve Dole,Peter Eisenhardt,Henry C. Ferguson,N. M. Förster Schreiber,Dave Frayer,Mauro Giavalisco,Minh Huynh,Anton M. Koekemoer,Casey Papovich,Naveen A. Reddy,Christian Surace,Harry I. Teplitz,Min S. Yun,G. W. Wilson +57 more
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In this paper, the authors examined the infrared (IR) 3-500μm spectral energy distributions (SEDs) of galaxies at 0 < z < 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, and AKARI data.Abstract:
We present the deepest 100 to 500 μm far-infrared observations obtained with the Herschel Space Observatory as part of the GOODS-Herschel key program, and examine the infrared (IR) 3–500 μm spectral energy distributions (SEDs) of galaxies at 0 < z < 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, and AKARI data. We determine the projected star formation densities of local galaxies from their radio and mid-IR continuum sizes.
We find that the ratio of total IR luminosity to rest-frame 8 μm luminosity, IR8 (≡ L_(IR)^(tot)/L_8), follows a Gaussian distribution centered on IR8 = 4 (σ = 1.6) and defines an IR main sequence for star-forming galaxies independent of redshift and luminosity. Outliers from this main sequence produce a tail skewed toward higher values of IR8. This minority population ( 3 × 10^(10) L_⊙ kpc^(-2)) and a high specific star formation rate (i.e., starbursts). The rest-frame, UV-2700 A size of these distant starbursts is typically half that of main sequence galaxies, supporting the correlation between star formation density and starburst activity that is measured for the local sample.
Locally, luminous and ultraluminous IR galaxies, (U)LIRGs (L_(IR)^(tot)≥ 10^(11) L_☉), are systematically in the starburst mode, whereas most distant (U)LIRGs form stars in the “normal” main sequence mode. This confusion between two modes of star formation is the cause of the so-called “mid-IR excess” population of galaxies found at z > 1.5 by previous studies. Main sequence galaxies have strong polycyclic aromatic hydrocarbon (PAH) emission line features, a broad far-IR bump resulting from a combination of dust temperatures (T_(dust) ~ 15–50 K), and an effective T_(dust) ~ 31 K, as derived from the peak wavelength of their infrared SED. Galaxies in the starburst regime instead exhibit weak PAH equivalent widths and a sharper far-IR bump with an effective T_(dust)~ 40 K. Finally, we present evidence that the mid-to-far IR emission of X-ray active galactic nuclei (AGN) is predominantly produced by star formation and that candidate dusty AGNs with a power-law emission in the mid-IR systematically occur in compact, dusty starbursts. After correcting for the effect of starbursts on IR8, we identify new candidates for extremely obscured AGNs.read more
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The connection between star formation and supermassive black hole activity in the local Universe
O. Torbaniuk,Maurizio Paolillo,Francisco J. Carrera,Stefano Cavuoti,C. Vignali,C. Vignali,Giuseppe Longo,James Aird,James Aird +8 more
TL;DR: In this paper, a study of the active galactic nucleus (AGN) activity in the local Universe (z < 0.33) and its correlation with the host galaxy properties, derived from a Sloan Digital Sky Survey (SDSS DR8) sample with spectroscopic star-formation rate (SFR) and stellar mass determination, is presented.
Book ChapterDOI
Extragalactic Astronomy: From Pioneers to Big Science
Roberto Rampazzo,Mauro D'Onofrio,Simone Zaggia,James Lattis,Martha P. Haynes,Riccardo Giovanelli,V. E. Karachentseva,Malcolm S. Longair,Per-Olof Lindblad,Alvio Renzini,Reinaldo R. de Carvalho,N. Kaifu,Jonathan Bland-Hawthorn,S. G. Djorgovski,Luciana Bianchi,Daniela Calzetti,Giuseppina Fabbiano,Francoise Combes,Cesare Chiosi,Jack W. Sulentic +19 more
TL;DR: In the beginning of the nineteenth century, one of the scientific issues driving the research of astronomers, like the Herschels, was to test if all the nebulae can be resolved into stars.
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Dust Temperature of Compact Star-forming Galaxies at $ z \sim 1-3$ in 3D-{\it HST}/CANDELS
TL;DR: In this article, the authors investigated the dependence of dust temperature on the size and star formation activity of compact star-forming galaxies (SFGs) and found that both extended and compact SFGs generally follow a similar dust-z$ evolutionary track as that of the main-sequence galaxies.
Journal ArticleDOI
A Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). IV. Rapidly Growing (Super-)Massive Black Holes in Extremely Radio-Loud Galaxies
Kohei Ichikawa,Takuji Yamashita,Yoshiki Toba,Tohru Nagao,Kohei Inayoshi,Maria Charisi,Wanqiu He,Alexander Wagner,Masayuki Akiyama,Bovornpratch Vijarnwannaluk,Xiaoyang Chen,Masaru Kajisawa,Taiki Kawamuro,Chien-Hsiu Lee,Yoshiki Matsuoka,Malte Schramm,Hyewon Suh,Masayuki Tanaka,Hisakazu Uchiyama,Yoshihiro Ueda,Janek Pflugradt,Hikaru Fukuchi +21 more
TL;DR: In this paper, the authors presented the optical and infrared properties of 39 extremely radio-loud galaxies discovered by cross-matching the Subaru/Hyper Suprime-Cam (HSC) deep optical imaging survey and VLA/FIRST 1.4 GHz radio survey.
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A Catalog of AGN Host Galaxies Observed with HST/ACS: Correlations between Star Formation and AGN Activity.
Aaron Stemo,Julia M. Comerford,R. Scott Barrows,Daniel Stern,Roberto J. Assef,Roger L. Griffith +5 more
TL;DR: The Advanced Camera for Surveys Active Galactic Nuclei (ACS-AGN) catalog as mentioned in this paper is a catalog of 2585 AGN host galaxies that are at redshifts 0.2
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