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Full-Text Articles in Physical Sciences and Mathematics
The Herschel M33 Extended Survey (Herm33es): Pacs Spectroscopy Of The Star Forming Region Bclmp 302, B. Mookerjea, C. Kramer, C. Buchbender, M. Boquien, S. Verley, M. Relaño, G. Quintana-Lacaci, S. Aalto, J. Braine, Daniela Calzetti, F. Combes, S. Garcia-Burillo, P. Gratier, C. Henkel, F. Israel, S. Lord, T. Nikola, M. Rölling, G. Stacey, F. S. Tabatabaei, F. Van Der Tak, P. Van Der Werf
The Herschel M33 Extended Survey (Herm33es): Pacs Spectroscopy Of The Star Forming Region Bclmp 302, B. Mookerjea, C. Kramer, C. Buchbender, M. Boquien, S. Verley, M. Relaño, G. Quintana-Lacaci, S. Aalto, J. Braine, Daniela Calzetti, F. Combes, S. Garcia-Burillo, P. Gratier, C. Henkel, F. Israel, S. Lord, T. Nikola, M. Rölling, G. Stacey, F. S. Tabatabaei, F. Van Der Tak, P. Van Der Werf
Daniela Calzetti
Context: The emission line of [CII] at 158 micron is one of the strongest cooling lines of the interstellar medium (ISM) in galaxies. Aims: Disentangling the relative contributions of the different ISM phases to [CII] emission, is a major topic of the HerM33es program, a Herschel key project to study the ISM in the nearby spiral galaxy M33. Methods: Using PACS, we have mapped the emission of [CII] 158 micron, [OI] 63 micron, and other FIR lines in a 2'x2' region of the northern spiral arm of M33, centered on the HII region BCLMP302. At the peak of H-alpha emission, …
Modeling The Effects Of Star Formation Histories On Halpha And Ultra-Violet Fluxes In Nearby Dwarf Galaxies, Daniel R. Weisz, Benjamin D. Johnson, L. Clifton Johnson, Evan D. Skillman, Janice C. Lee, Robert C. Kennicutt Jr., Daniela Calzetti, Liese Van Zee, Matthew S. Bothwell, Julianne J. Dalcanton, Daniel A. Dale, Benjamin F. Williams
Modeling The Effects Of Star Formation Histories On Halpha And Ultra-Violet Fluxes In Nearby Dwarf Galaxies, Daniel R. Weisz, Benjamin D. Johnson, L. Clifton Johnson, Evan D. Skillman, Janice C. Lee, Robert C. Kennicutt Jr., Daniela Calzetti, Liese Van Zee, Matthew S. Bothwell, Julianne J. Dalcanton, Daniel A. Dale, Benjamin F. Williams
Daniela Calzetti
We consider the effects of non-constant star formation histories (SFHs) on Halpha and GALEX far ultra-violet (FUV) star formation rate (SFR) indicators. Under the assumption of a fully populated Chabrier IMF, we compare the distribution of Halpha-to-FUV flux ratios from ~ 1500 simple, periodic model SFHs with observations of 185 galaxies from the Spitzer Local Volume Legacy survey. We find a set of SFH models that are well matched to the data, such that more massive galaxies are best characterized by nearly constant SFHs, while low mass systems experience bursts amplitudes of ~ 30 (i.e., an increase in the SFR …
Herschel Observations Of The Centaurus Oluster - The Dynamics Of Cold Gas In A Cool Core, R. Mittal, C. P. O'Dea, Gary J. Ferland, J. B. R. Oonk, A. C. Edge, R. E. A. Canning, H. Russell, S. A. Baum, H. Böhringer, F. Combes, M. Donahue, A. C. Fabian, N. A. Hatch, A. Hoffer, R. Johnstone, B. R. Mcnamara, P. Salomé, G. Tremblay
Herschel Observations Of The Centaurus Oluster - The Dynamics Of Cold Gas In A Cool Core, R. Mittal, C. P. O'Dea, Gary J. Ferland, J. B. R. Oonk, A. C. Edge, R. E. A. Canning, H. Russell, S. A. Baum, H. Böhringer, F. Combes, M. Donahue, A. C. Fabian, N. A. Hatch, A. Hoffer, R. Johnstone, B. R. Mcnamara, P. Salomé, G. Tremblay
Physics and Astronomy Faculty Publications
Brightest cluster galaxies (BCGs) in the cores of galaxy clusters have distinctly different properties from other low-redshift massive ellipticals. The majority of the BCGs in cool-core clusters show signs of active star formation. We present observations of NGC 4696, the BCG of the Centaurus galaxy cluster, at far-infrared (FIR) wavelengths with theHerschel space telescope. Using the PACS spectrometer, we detect the two strongest coolants of the interstellar medium, [C II] at 157.74 μm and [O I] at 63.18 μm, and in addition [N II] at 121.90 μm. The [C II] emission is extended over a region of 7 kpc …