Modeling Dust and Starlight in Galaxies Observed by Spitzer and Herschel: NGC?628 and NGC?6946
G. Aniano,Bruce T. Draine,Daniela Calzetti,Daniel A. Dale,Charles W. Engelbracht,Karl D. Gordon,Leslie K. Hunt,Robert C. Kennicutt,Oliver Krause,Adam K. Leroy,H-W. Rix,Helene Roussel,Karin Sandstrom,Marc Sauvage,Fabian Walter,Lee Armus,Alberto D. Bolatto,Alison F. Crocker,J. Donovan Meyer,Maud Galametz,George Helou,J. Hinz,Benjamin D. Johnson,Jin Koda,E. Montiel,Eric J. Murphy,Ramin A. Skibba,J. D. T. Smith,Mark G. Wolfire +28 more
TLDR
In this article, the authors used the Draine & Li model to estimate the surface density of the dust in NGC 628 and NGC 6946, two nearby spiral galaxies in the KINGFISH sample.Abstract:
We characterize the dust in NGC 628 and NGC 6946, two nearby spiral galaxies in the KINGFISH sample. With data from 3.6 μm to 500 μm, dust models are strongly constrained. Using the Draine & Li dust model (amorphous silicate and carbonaceous grains), for each pixel in each galaxy we estimate (1) dust mass surface density, (2) dust mass fraction contributed by polycyclic aromatic hydrocarbons, (3) distribution of starlight intensities heating the dust, (4) total infrared (IR) luminosity emitted by the dust, and (5) IR luminosity originating in regions with high starlight intensity. We obtain maps for the dust properties, which trace the spiral structure of the galaxies. The dust models successfully reproduce the observed global and resolved spectral energy distributions (SEDs). The overall dust/H mass ratio is estimated to be 0.0082 ± 0.0017 for NGC 628, and 0.0063 ± 0.0009 for NGC 6946, consistent with what is expected for galaxies of near-solar metallicity. Our derived dust masses are larger (by up to a factor of three) than estimates based on single-temperature modified blackbody fits. We show that the SED fits are significantly improved if the starlight intensity distribution includes a (single intensity) "delta function" component. We find no evidence for significant masses of cold dust (T ≲ 12 K). Discrepancies between PACS and MIPS photometry in both low and high surface brightness areas result in large uncertainties when the modeling is done at PACS resolutions, in which case SPIRE, MIPS70, and MIPS160 data cannot be used. We recommend against attempting to model dust at the angular resolution of PACS.read more
Citations
More filters
Journal ArticleDOI
Molecular gas and star formation in nearby disk galaxies
Adam K. Leroy,Fabian Walter,Karin Sandstrom,Andreas Schruba,Juan-Carlos Muñoz-Mateos,Frank Bigiel,Alberto D. Bolatto,Elias Brinks,W. J. G. de Blok,Sharon E. Meidt,Hans-Walter Rix,Erik Rosolowsky,Eva Schinnerer,K. F. Schuster,Antonio Usero +14 more
TL;DR: In this paper, the authors compare molecular gas traced by CO (2-1) maps from the HERACLES survey, with tracers of the recent star formation rate (SFR) across 30 nearby disk galaxies.
Journal ArticleDOI
The CO-to-H2 Conversion Factor and Dust-to-gas Ratio on Kiloparsec Scales in Nearby Galaxies
Karin Sandstrom,Adam K. Leroy,Frederick M. Walter,Alberto D. Bolatto,Kevin V. Croxall,Kevin V. Croxall,Bruce T. Draine,Christine D. Wilson,Mark G. Wolfire,Daniela Calzetti,Robert C. Kennicutt,G. Aniano,G. Aniano,J. Donovan Meyer,Antonio Usero,Frank Bigiel,Elias Brinks,W. J. G. de Blok,Alison F. Crocker,Alison F. Crocker,Daniel A. Dale,Charles W. Engelbracht,Charles W. Engelbracht,Maud Galametz,Brent Groves,Leslie K. Hunt,Jin Koda,Kathryn Kreckel,Hendrik Linz,Sharon E. Meidt,Eric W. Pellegrini,Hans-Walter Rix,Helene Roussel,Eva Schinnerer,Andreas Schruba,K. F. Schuster,Ramin A. Skibba,Ramin A. Skibba,T. P. R. van der Laan,P. N. Appleton,Lee Armus,Bernhard R. Brandl,Karl D. Gordon,J. Hinz,Oliver Krause,E. Montiel,E. Montiel,Marc Sauvage,Anika Schmiedeke,Anika Schmiedeke,J. D. T. Smith,L. Vigroux +51 more
TL;DR: In this paper, the authors presented a large-scale spatial resolution map of the CO-to-H$2}$ conversion factor and dust-togas ratio (DGR) in 26 nearby, star-forming galaxies.
Journal ArticleDOI
Andromeda's dust
Bruce T. Draine,G. Aniano,Oliver Krause,Brent Groves,Karin Sandstrom,Robert Braun,Adam K. Leroy,Ulrich Klaas,Hendrik Linz,Hans-Walter Rix,Eva Schinnerer,Anika Schmiedeke,Fabian Walter +12 more
TL;DR: In this article, the authors used the Spitzer Space Telescope and Herschel Space Observatory imaging of M31 to construct maps of dust surface density, dust-to-gas ratio, starlight heating intensity, and polycyclic aromatic hydrocarbon (PAH) abundance, out to R ≈ 25 kpc.
Journal ArticleDOI
An Overview of the Dwarf Galaxy Survey
Suzanne C. Madden,Aurélie Rémy-Ruyer,Maud Galametz,Diane Cormier,Vianney Lebouteiller,Frédéric Galliano,Sacha Hony,George J. Bendo,Matthew Smith,M. Pohlen,H. Roussel,Marc Sauvage,Ronin Wu,Eckhard Sturm,Albrecht Poglitsch,A. Contursi,V. Doublier,Maarten Baes,M. J. Barlow,Alessandro Boselli,Médéric Boquien,L. R. Carlson,Laure Ciesla,Asantha Cooray,Luca Cortese,I. De Looze,Judith A. Irwin,K. G. Isaak,Julia Kamenetzky,O. L. Karczewski,N. Y. Lu,J. A. MacHattie,B. O'Halloran,T. J. Parkin,N. Rangwala,Maximilien R. P. Schirm,Benjamin L. Schulz,Luigi Spinoglio,Mattia Vaccari,Christine D. Wilson,Herve Wozniak +40 more
TL;DR: The Dwarf Galaxy Survey (DGS) as discussed by the authors was designed to get a handle on the physics of the interstellar medium (ISM) of low metallicity dwarf galaxies, especially their dust and gas properties and the ISM heating and cooling processes.
Journal ArticleDOI
THE PdBI ARCSECOND WHIRLPOOL SURVEY (PAWS). I. A CLOUD-SCALE/MULTI-WAVELENGTH VIEW OF THE INTERSTELLAR MEDIUM IN A GRAND-DESIGN SPIRAL GALAXY
Eva Schinnerer,Sharon E. Meidt,Jérôme Pety,Annie Hughes,Dario Colombo,Santiago García-Burillo,Karl Schuster,Gaelle Dumas,Clare Dobbs,Adam K. Leroy,Carsten Kramer,Todd A. Thompson,Michael W. Regan +12 more
TL;DR: In this article, the authors used two-dimensional maps, a polar cross-correlation technique and pixel-by-pixel diagrams to quantitatively characterize the relation of molecular gas (or CO emission) to other tracers of the interstellar medium, star formation and stellar populations of varying ages.
References
More filters
Journal ArticleDOI
The Chemical Composition of the Sun
TL;DR: The solar chemical composition is an important ingredient in our understanding of the formation, structure, and evolution of both the Sun and our Solar System as discussed by the authors, and it is an essential refer...
Astronomical Data Analysis Software and Systems
TL;DR: The ADS abstract service at: http://adswww.harvard.edu has been updated considerably in the last year and new capabilities in the search engine include searching for multi-word phrases and searching for various logical combinations of search terms.
Journal ArticleDOI
The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
TL;DR: The Infrared Array Camera (IRAC) is one of the three focal plane instruments in the Spitzer Space Telescope as discussed by the authors, which is a four-channel camera that obtains simultaneous broadband images at 3.6, 4.5, 5.8, and 8.0 microns.
Journal ArticleDOI
The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
Giovanni G. Fazio,Joseph L. Hora,Lori E. Allen,M. L. N. Ashby,Pauline Barmby,Lynne K. Deutsch,Lynne K. Deutsch,J.-S. Huang,S. C. Kleiner,Massimo Marengo,S. T. Megeath,Gary J. Melnick,Michael A. Pahre,Brian M. Patten,J. Polizotti,Howard A. Smith,R. S. Taylor,Zhong Wang,S. P. Willner,William F. Hoffmann,Judy Pipher,William J. Forrest,C. W. McMurty,Craig R. McCreight,Mark E. McKelvey,Robert E. McMurray,David G. Koch,Samuel H. Moseley,R. G. Arendt,John Eric Mentzell,Catherine T. Marx,P. Losch,P. Mayman,W. Eichhorn,Danny J. Krebs,Murzy D. Jhabvala,Daniel Y. Gezari,D. J. Fixsen,J. Flores,K. Shakoorzadeh,R. Jungo,Claef Hakun,Lois G. Workman,Gabriel Karpati,R. Kichak,R. Whitley,S. Mann,Eric V. Tollestrup,Peter Eisenhardt,Daniel Stern,Varoujan Gorjian,Bidushi Bhattacharya,Sean Carey,Brant O. Nelson,William J. Glaccum,Mark Lacy,Patrick J. Lowrance,Seppo Laine,William T. Reach,J. A. Stauffer,Jason Surace,Gillian Wilson,Edward L. Wright,Alan W. Hoffman,George Domingo,Martin Cohen +65 more
TL;DR: The Infrared Array Camera (IRAC) is one of three focal plane instruments on the Spitzer Space Telescope as mentioned in this paper, which is a four-channel camera that obtains simultaneous broadband images at 3.6, 4.5, 5.8, and 8.0 m.
Journal ArticleDOI
Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
Göran Pilbratt,J. R. Riedinger,T. Passvogel,G. Crone,D. Doyle,U. Gageur,Ana M. Heras,C. Jewell,L. Metcalfe,S. Ott,Michael Schmidt +10 more
TL;DR: Herschel was launched on 14 May 2009, and is now an operational ESA space observatory o ering unprecedented observational capabilities in the far-infrared and sub-millimetre spectral range 55 671 m.
Related Papers (5)
Infrared Emission from Interstellar Dust. IV. The Silicate-Graphite-PAH Model in the Post-Spitzer Era
Bruce T. Draine,Aigen Li +1 more
The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
Albrecht Poglitsch,C. Waelkens,Norbert Geis,Helmut Feuchtgruber,B. Vandenbussche,L. Rodriguez,Oliver Krause,Etienne Renotte,C. Van Hoof,P. Saraceno,J. Cepa,Franz Kerschbaum,P. Agnese,Babar Ali,Bruno Altieri,Paola Andreani,J.-L. Augueres,Zoltan Balog,L. Barl,Otto H. Bauer,N. Belbachir,M. Benedettini,N. Billot,O. Boulade,Horst Bischof,Joris Blommaert,E. Callut,C. Cara,R. Cerulli,D. Cesarsky,Alessandra Contursi,Ybe Creten,W. De Meester,V. Doublier,E. Doumayrou,L. Duband,Katrina Exter,Reinhard Genzel,Jean-Marie Gillis,Ulrich Grözinger,Thomas Henning,J. M. Herreros,Rik Huygen,Massimo Inguscio,Gerhard Jakob,Claude Jamar,C. Jean,J. de Jong,Reinhard O. Katterloher,Csaba Kiss,Ulrich Klaas,Dietrich Lemke,Dieter Lutz,Suzanne C. Madden,Benoit Marquet,J. Martignac,A. Mazy,Patrick Merken,Francis Montfort,L. Morbidelli,Thomas Müller,Markus Nielbock,K. Okumura,R. Orfei,Roland Ottensamer,Roland Ottensamer,Stefano Pezzuto,Paola Popesso,Jan Putzeys,S. Regibo,V. Reveret,Pierre Royer,Marc Sauvage,Jürgen Schreiber,Jutta Stegmaier,D. Schmitt,J. Schubert,E. Sturm,M. Thiel,G. Tofani,R. Vavrek,M. Wetzstein,E. Wieprecht,Erich Wiezorrek +83 more
The Herschel-SPIRE instrument and its in-flight performance
Matthew Joseph Griffin,Alain Abergel,A. Abreu,Peter A. R. Ade,Philippe André,J.-L. Augueres,Tom Babbedge,Y. Bae,T. Baillie,Jean-Paul Baluteau,M. J. Barlow,George J. Bendo,Dominique Benielli,James J. Bock,P. Bonhomme,Drew Brisbin,C. Brockley-Blatt,Martin E. Caldwell,C. Cara,N. Castro-Rodriguez,R. Cerulli,Pierre Chanial,Pierre Chanial,Sina Chen,Eric M. Clark,David L. Clements,L. Clerc,J. Coker,D. Communal,Luca Conversi,Peter Timothy Cox,D. Crumb,C. R. Cunningham,F. Daly,Gary R. Davis,P. De Antoni,J. Delderfield,N. Devin,A. M. di Giorgio,Iris Didschuns,Kjetil Dohlen,M. Donati,A. Dowell,C. D. Dowell,L. Duband,Luc Dumaye,R. J. Emery,Marc Ferlet,D. Ferrand,Jean Fontignie,M. Fox,Alberto Franceschini,Margaret A. Frerking,Trevor Fulton,J. Garcia,R. Gastaud,Walter Kieran Gear,Jason Glenn,A-S Goizel,Douglas Griffin,T. Grundy,S. Guest,L. Guillemet,Peter Charles Hargrave,Martin Harwit,P. Hastings,Evanthia Hatziminaoglou,Evanthia Hatziminaoglou,M. Herman,B. Hinde,Viktor Hristov,Maohai Huang,P. Imhof,Kate Gudrun Isaak,Kate Gudrun Isaak,Ulf E. Israelsson,Rob Ivison,D. E. Jennings,Brian John Kiernan,K. J. King,Andrew E. Lange,William B. Latter,Glenn Laurent,Philippe Laurent,S. J. Leeks,Emmanuel Lellouch,Louis Levenson,Bo Li,Jin-Zeng Li,J. Lilienthal,T. L. Lim,S. J. Liu,N. Lu,Suzanne C. Madden,G. Mainetti,P. Marliani,D. J. McKay,K. Mercier,Sergio Molinari,Huw R. Morris,H. Moseley,Jerry Mulder,M. Mur,David A. Naylor,Hien Nguyen,B. O'Halloran,Seb Oliver,G. Olofsson,Hans Olofsson,R. Orfei,Mat Page,I. Pain,P. Panuzzo,Andreas Papageorgiou,G. Parks,P. Parr-Burman,Alan Pearce,C. P. Pearson,C. P. Pearson,Ismael Perez-Fournon,F. Pinsard,Giampaolo Pisano,Giampaolo Pisano,J. Podosek,Michael Pohlen,Edward Polehampton,Edward Polehampton,D. Pouliquen,D. Rigopoulou,D. Rizzo,Isaac Roseboom,Helene Roussel,Michael Rowan-Robinson,B. K. Rownd,P. Saraceno,Marc Sauvage,Richard S. Savage,Giorgio Savini,Giorgio Savini,Eric Sawyer,Carsten Scharmberg,D. Schmitt,D. Schmitt,Nicola Schneider,Benjamin L. Schulz,Arnold A. Schwartz,Rick Shafer,David L. Shupe,B. Sibthorpe,Sunil Sidher,Alan Smith,Anthony J. Smith,David J. Smith,Locke D. Spencer,Locke D. Spencer,Brian Stobie,Rashmikant V. Sudiwala,K. Sukhatme,Christian Surace,Jamie Stevens,B. M. Swinyard,Markos Trichas,T. Tourette,H. Triou,S. Tseng,Carole Tucker,A. D. Turner,Mattia Vaccari,Ivan Valtchanov,L. Vigroux,L. Vigroux,E. Virique,George M. Voellmer,H. J. Walker,Robyn L. Ward,Timothy James Waskett,M. Weilert,Roger Wesson,Glenn J. White,Glenn J. White,Nicola Jane Whitehouse,Christine D. Wilson,Berend Winter,Adam Woodcraft,Gillian S. Wright,C. K. Xu,Annie Zavagno,Michael Zemcov,L. Zhang,E. Zonca +189 more
Dust Masses, PAH Abundances, and Starlight Intensities in the SINGS Galaxy Sample
Bruce T. Draine,Daniel A. Dale,George J. Bendo,Karl D. Gordon,J. D. T. Smith,Lee Armus,Charles W. Engelbracht,George Helou,Robert C. Kennicutt,Robert C. Kennicutt,Aigen Li,Helene Roussel,Fabian Walter,Daniela Calzetti,John Moustakas,John Moustakas,Eric J. Murphy,George H. Rieke,Caroline Bot,David Hollenbach,Kartik Sheth,Harry I. Teplitz +21 more