A dataset provided by the European Space Agency

Name OT1_aleroy_1
Title Dust-Based Molecular Gas Maps of Nearby Low-Metallicity Galaxies


DOI 10.5270/esa-mn3r3wr
Author leroy, a.
Description We propose deep PACS 100 and 160 micron imaging of three nearby, star-forming, low metallicity galaxies. These data will allow us to make sensitive, high-resolution estimates of dust mass. We will combine these measurements with our in-hand HI maps to measure the dust-to-gas ratio and estimate the molecular gas (H2) content in each galaxy. This is a challenging measurement that requires requires the resolution of PACS and good sensitivity, but H2 masses at low metallicity are very difficult to estimate by any other means. We will use these H2 measurements to test recent models of H2 formation in galaxies, improve the calibration of the CO-to-H2 conversion factor, and assess the efficiency of star formation from H2 at low metallicity. We will also be able to put constraints on the life cycle of dust at low metallicity from gradients in the dust-to-gas ratio. These are all open questions that can best be addressed by observing the molecular gas in low metallicity galaxies. Carrying out such an experiment outside the Local Group is necessary something that only Herschel can do.
Publication DustPedia: Multiwavelength photometry and imagery of 875 nearby galaxies in 42 ultraviolet-microwave bands . Clark C. J. R. et al. . Astronomy & Astrophysics, Volume 609, id.A37, 30 pp. . 609 . 10.1051\/0004-6361\/201731419 . 2018A&A...609A..37C ,
Dust emissivity and absorption cross section in DustPedia late-type galaxies . Bianchi S. et al. . Astronomy and Astrophysics . null . null . 2019A&A...631A.102B ,
DustPedia: the relationships between stars, gas, and dust for galaxies residing in different environments . Davies J. I. et al. . Astronomy and Astrophysics . null . null . 2019A&A...626A..63D ,
Old and young stellar populations in DustPedia galaxies and their role in dust heating . Nersesian A. et al. . Astronomy and Astrophysics . null . null . 2019A&A...624A..80N ,
Fraction of bolometric luminosity absorbed by dust in DustPedia galaxies . Bianchi S. et al. . Astronomy & Astrophysics, Volume 620, id.A112, 21 pp. . 620 . 10.1051\/0004-6361\/201833699 . 2018A&A...620A.112B ,
Dust emission profiles of DustPedia galaxies . Mosenkov A. V. et al. . Astronomy & Astrophysics, Volume 622, id.A132, 24 pp. . 622 . 10.1051\/0004-6361\/201833932 . 2019A&A...622A.132M ,
Instrument PACS_PacsPhoto_largeScan
Temporal Coverage 2011-07-03T17:57:58Z/2011-10-30T12:31:08Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2012-04-30T08:47:17Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-04-30T08:47:17Z, OT1_aleroy_1, SPG v14.2.0. https://doi.org/10.5270/esa-mn3r3wr