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Full-Text Articles in Astrophysics and Astronomy
Resolving The Far-Ir Line Deficit: Photoelectric Heating And Far-Ir Line Cooling In Ngc 1097 And Ngc 4559, Kevin V. Croxall, J. D. Smith, M. G. Wolfire, H. Roussel, K. M. Sandstrom, B. T. Draine, G. Aniano, D. A. Dale, L. Armus, P. Beirão, G. Helou, A. D. Bolatto, P. N. Appleton, B. R. Brandl, Daniela Calzetti, A. F. Crocker, M. Galametz, B. A. Groves, C.-N. Hao, L. K. Hunt, B. D. Johnson, R, C, Kennicutt, J. Koda, O. Krause, Y. Li, S. E. Meidt, E. J. Murphy, N. Rahman, H.-W. Rix, M. Sauvage, E. Schinnerer, F. Walter, C. D. Wilson
Resolving The Far-Ir Line Deficit: Photoelectric Heating And Far-Ir Line Cooling In Ngc 1097 And Ngc 4559, Kevin V. Croxall, J. D. Smith, M. G. Wolfire, H. Roussel, K. M. Sandstrom, B. T. Draine, G. Aniano, D. A. Dale, L. Armus, P. Beirão, G. Helou, A. D. Bolatto, P. N. Appleton, B. R. Brandl, Daniela Calzetti, A. F. Crocker, M. Galametz, B. A. Groves, C.-N. Hao, L. K. Hunt, B. D. Johnson, R, C, Kennicutt, J. Koda, O. Krause, Y. Li, S. E. Meidt, E. J. Murphy, N. Rahman, H.-W. Rix, M. Sauvage, E. Schinnerer, F. Walter, C. D. Wilson
Daniela Calzetti
The physical state of interstellar gas and dust is dependent on the processes which heat and cool this medium. To probe heating and cooling of the ISM over a large range of infrared surface brightness, on sub-kiloparsec scales, we employ line maps of [C \ii] 158 $\mu$m, [O \one] 63 $\mu$m, and [N \ii] 122 $\mu$m in NGC 1097 and NGC 4559, obtained with the PACS spectrometer onboard {\it Herschel}. We matched new observations to existing Spitzer-IRS data that trace the total emission of polycyclic aromatic hydrocarbons (PAHs). We confirm at small scales in these galaxies that the canonical measure …
Star Formation Laws: The Effects Of Gas Cloud Sampling, Daniela Calzetti, G. Liu, J. Koda
Star Formation Laws: The Effects Of Gas Cloud Sampling, Daniela Calzetti, G. Liu, J. Koda
Daniela Calzetti
Recent observational results indicate that the functional shape of the spatially-resolved star formation-molecular gas density relation depends on the spatial scale considered. These results may indicate a fundamental role of sampling effects on scales that are typically only a few times larger than those of the largest molecular clouds. To investigate the impact of this effect, we construct simple models for the distribution of molecular clouds in a typical star-forming spiral galaxy, and, assuming a power-law relation between SFR and cloud mass, explore a range of input parameters. We confirm that the slope and the scatter of the simulated SFR-molecular …
Kingfish -- Key Insights On Nearby Galaxies: A Far-Infrared Survey With Herschel: Survey Description And Image Atlas, R. C. Kennicutt, Daniela Calzetti, G. Aniano, P. Appleton, L. Armus, P. Beirão, A. D. Bolatto, B. Brandl, A. Crocker, K. Croxall, D. A. Dale, J. Donovan Meyer, B. T. Draine, C. W. Engelbracht, M. Galametz, K. D. Gordon, B. Groves, C.-N. Hao, G. Helou, J. Hinz, L. K. Hunt, B. Johnson, J. Koda, O. Krause, A. K. Leroy, Y. Li, S. Meidt, E. Montiel, E. J. Murphy, N. Rahman, H.-W. Rix, H. Roussel, K. Sandstrom, M. Sauvage, E. Schinnerer, K. Skibba, J. D. T. Smith, S. Srinivasan, L. Virgroux, F. Walter, C. D. Wilson, M. Wolfire, S. Zibetti
Kingfish -- Key Insights On Nearby Galaxies: A Far-Infrared Survey With Herschel: Survey Description And Image Atlas, R. C. Kennicutt, Daniela Calzetti, G. Aniano, P. Appleton, L. Armus, P. Beirão, A. D. Bolatto, B. Brandl, A. Crocker, K. Croxall, D. A. Dale, J. Donovan Meyer, B. T. Draine, C. W. Engelbracht, M. Galametz, K. D. Gordon, B. Groves, C.-N. Hao, G. Helou, J. Hinz, L. K. Hunt, B. Johnson, J. Koda, O. Krause, A. K. Leroy, Y. Li, S. Meidt, E. Montiel, E. J. Murphy, N. Rahman, H.-W. Rix, H. Roussel, K. Sandstrom, M. Sauvage, E. Schinnerer, K. Skibba, J. D. T. Smith, S. Srinivasan, L. Virgroux, F. Walter, C. D. Wilson, M. Wolfire, S. Zibetti
Daniela Calzetti
The KINGFISH project (Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel) is an imaging and spectroscopic survey of 61 nearby (d < 30 Mpc) galaxies, chosen to cover a wide range of galaxy properties and local interstellar medium (ISM) environments found in the nearby Universe. Its broad goals are to characterize the ISM of present-day galaxies, the heating and cooling of their gaseous and dust components, and to better understand the physical processes linking star formation and the ISM. KINGFISH is a direct descendant of the Spitzer Infrared Nearby Galaxies Survey (SINGS), which produced complete Spitzer imaging and spectroscopic mapping and a comprehensive set of multi-wavelength ancillary observations for the sample. The Herschel imaging consists of complete maps for the galaxies at 70, 100, 160, 250, 350, and 500 microns. The spectal line imaging of the principal atomic ISM cooling lines ([OI]63um, [OIII]88um, [NII]122,205um, and [CII]158um) covers the subregions in the centers and disks that already have been mapped in the mid-infrared with Spitzer. The KINGFISH and SINGS multi-wavelength datasets combined provide panchromatic mapping of the galaxies sufficient to resolve individual star-forming regions, and tracing the important heating and cooling channels of the ISM, across a wide range of local extragalactic ISM environments. This paper summarizes the scientific strategy for KINGFISH, the properties of the galaxy sample, the observing strategy, and data processing and products. It also presents a combined Spitzer and Herschel image atlas for the KINGFISH galaxies, covering the wavelength range 3.6 -- 500 microns. All imaging and spectroscopy data products will be released to the Herschel user generated product archives.
Dust-Corrected Star Formation Rates Of Galaxies. Ii. Combinations Of Ultraviolet And Infrared Tracers, Cai-Na Hao, C. Kennicutt Kr., Benjamin D. Johnson, Daniela Calzetti, Daniel A. Dale, John Moustakas
Dust-Corrected Star Formation Rates Of Galaxies. Ii. Combinations Of Ultraviolet And Infrared Tracers, Cai-Na Hao, C. Kennicutt Kr., Benjamin D. Johnson, Daniela Calzetti, Daniel A. Dale, John Moustakas
Daniela Calzetti
We present new calibrations of far-ultraviolet (FUV) attenuation as derived from the total infrared to FUV luminosity ratio (IRX) and the FUV-NUV color. We find that the IRX-corrected FUV luminosities are tightly and linearly correlated with the attenuation-corrected H\alpha\ luminosities (as measured from the Balmer decrement), with a rms scatter of $\pm 0.09$ dex. The ratios of these attenuation-corrected FUV to H\alpha\ luminosities are consistent with evolutionary synthesis model predictions, assuming a constant star formation rate over 100 Myr, solar metallicity and either a Salpeter or a Kroupa IMF with lower and upper mass limits of 0.1 and 100\msun. The …
Herschel Far-Infrared And Sub-Millimeter Photometry For The Kingfish Sample Of Nearby Galaxies, D. A. Dale, G. Aniano, C. W. Engelbracht, J. L. Hinz, O. Krause, E. J. Montiel, H. Roussel, P. N. Appleton, L. Armus, P. Beirão, A. D. Bolatto, B. R. Brandl, Daniela Calzetti, A. F. Crocker, K. F. Croxall, B. T. Draine, M. Galametz, K. D. Gordon, B. A. Groves, C.-N. Hao, G. Helou, L. K. Hunt, B. D. Johnson, R. C. Kennicutt, J. Koda, A. K. Leroy, Y. Li, S. E. Meidt, A. E. Miller, E. J. Murphy, N. Rahman, H.-W. Rix, K. M. Sandstrom, M. Sauvage, E. Schinnerer, R. A. Skibba, J.-D. T. Smith, F. S. Tabatabaei, F. Walter, C. D. Wilson, M. G. Wolfire, S. Zibetti
Herschel Far-Infrared And Sub-Millimeter Photometry For The Kingfish Sample Of Nearby Galaxies, D. A. Dale, G. Aniano, C. W. Engelbracht, J. L. Hinz, O. Krause, E. J. Montiel, H. Roussel, P. N. Appleton, L. Armus, P. Beirão, A. D. Bolatto, B. R. Brandl, Daniela Calzetti, A. F. Crocker, K. F. Croxall, B. T. Draine, M. Galametz, K. D. Gordon, B. A. Groves, C.-N. Hao, G. Helou, L. K. Hunt, B. D. Johnson, R. C. Kennicutt, J. Koda, A. K. Leroy, Y. Li, S. E. Meidt, A. E. Miller, E. J. Murphy, N. Rahman, H.-W. Rix, K. M. Sandstrom, M. Sauvage, E. Schinnerer, R. A. Skibba, J.-D. T. Smith, F. S. Tabatabaei, F. Walter, C. D. Wilson, M. G. Wolfire, S. Zibetti
Daniela Calzetti
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel (KINGFISH) sample. The spatially-integrated fluxes are largely consistent with expectations based on Spitzer far-infrared photometry and extrapolations to longer wavelengths using popular dust emission models. Dwarf irregular galaxies are notable exceptions, as already noted by other authors, as their 500um emission shows evidence for a sub-millimeter excess. In addition, the fraction of dust heating attributed to intense radiation fields associated with photo-dissociation regions is found to be (21+/-4)% larger when Herschel data …
The Emission By Dust And Stars Of Nearby Galaxies In The Herschel Kingfish Survey, Ramin A. Skibba, Charles W. Engelbracht, Daniel Dale, Joannah Hinz, Stefano Zibetti, Alison Crocker, Brent Groves, Leslie Hunt, Benjamin D. Johnson, Sharon Meidt, Eric J. Murphy, Philip Appleton, Lee Armus, Alberto Bolatto, Bernhard Brandl, Daniela Calzetti, Kevin Croxall, Maud Galametz, Karl. D. Gordon, Robert C. Kennicutt, Jin Koda, Oliver Krause, Edward Montiel, Hans-Walter Rix, Hélène Roussel, Karin Sandstrom, Marc Sauvage, Eva Schinnerer, J. D. Smith, Fabian Walter, Christine D. Wilson, Mark Wolfire
The Emission By Dust And Stars Of Nearby Galaxies In The Herschel Kingfish Survey, Ramin A. Skibba, Charles W. Engelbracht, Daniel Dale, Joannah Hinz, Stefano Zibetti, Alison Crocker, Brent Groves, Leslie Hunt, Benjamin D. Johnson, Sharon Meidt, Eric J. Murphy, Philip Appleton, Lee Armus, Alberto Bolatto, Bernhard Brandl, Daniela Calzetti, Kevin Croxall, Maud Galametz, Karl. D. Gordon, Robert C. Kennicutt, Jin Koda, Oliver Krause, Edward Montiel, Hans-Walter Rix, Hélène Roussel, Karin Sandstrom, Marc Sauvage, Eva Schinnerer, J. D. Smith, Fabian Walter, Christine D. Wilson, Mark Wolfire
Daniela Calzetti
Using new far-infrared imaging from the Herschel Space Observatory with ancillary data from ultraviolet to submillimeter wavelengths, we estimate the total emission from dust and stars of 62 nearby galaxies in the KINGFISH survey in a way that is as empirical and model-independent as possible. We collect and exploit these data in order to measure from the spectral energy distributions (SEDs) precisely how much stellar radiation is intercepted and re-radiated by dust, and how this quantity varies with galaxy properties. By including SPIRE data, we are more sensitive to emission from cold dust grains than previous analyses at shorter wavelengths, …