A dataset provided by the European Space Agency

Name OT2_yshi_3
Title Extremely-metal poor galaxies: mapping dust emission
URL

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DOI https://doi.org/10.5270/esa-q4fbs1o
Author shi, y.
Description The understanding of the interstellar medium (ISM) and star formation
in the low-metallicity environment is crucial to constrain formation
of stars and galaxies of the first generation. The local extremely
low-metallicity galaxies (XMPGs) with Z<Zsun/20 offer the unique
laboratory with nearly metal-free environment that mimics the
condition in the early universe. Previous infrared studies have
focused on their integrated properties due to their small sizes and
faint brightness. The general conclusion is that they show dramatic
different ISM and star formation properties from more metal-rich
galaxies, and that a large diversity in the properties is also seen
among XMPGs alone. The high resolution combined with its multiple
far-IR bands of Herschel will revolutionize the study of ISM and star
formation in XMPGs through the spatially-resolved images of dust
properties (mass and temperature) and SFRs. By relating the dust and
star formation properties to the local physical conditions, we can
start to understand the underlying physical mechanisms that regulate
ISM and star formation processes in the extremely low-metallicity
environment. We propose to obtain deep map of the dust emission in
three XMPGs with Herschel PACS and SPIRE photometer. These three
objects are carefully selected to facilitate the spatially-resolved
study, i.e. the large size and previous IR detections by
Spitzer. Combined with a rich ancillary data, we will (1) model dust
emission to derive dust properties and then relate it to the local
physical properties; (2) derive reliable SFRs by combining IR-based
obscured SFRs and UV-based unobscured ones, from which we then can
understand the star formation processes at sub-kpc scales.
Publication Spatially resolved dust emission of extremely metal-poor galaxies* . Zhou Luwenjia et al. . Monthly Notices of the Royal Astronomical Society, Volume 458, Issue 1, p.772-780 . 458 . 10.1093\/mnras\/stw345 . 2016MNRAS.458..772Z ,
Inefficient star formation in extremely metal poor galaxies . Shi Yong et al. . Nature, Volume 514, Issue 7522, pp. 335-338 (2014). . 514 . 10.1038\/nature13820 . 2014Natur.514..335S ,
Instrument PACS_PacsPhoto_largeScan, SPIRE_SpirePhoto_small
Temporal Coverage 2012-04-06T00:34:48Z/2012-11-19T05:55:03Z
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 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/h®erschel/
Date Published 2013-05-19T04:11:12Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, shi, y., 2013, OT2_yshi_3, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-q4fbs1o