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The "Cosmic Seagull...
The "Cosmic Seagull": A Highly Magnified Disk-like Galaxy at z ≃ 2.8 behind the Bullet Cluster
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- Motta, V. (author)
- Universidad de Valparaíso,University of Valparaíso
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- Ibar, E. (author)
- Universidad de Valparaíso,University of Valparaíso
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- Verdugo, T. (author)
- Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico
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Molina, J. (author)
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- Hughes, T. M. (author)
- Chinese Academy of Sciences,University of Science and Technology of China,Universidad de Valparaíso,University of Valparaíso
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- Birkinshaw, M. (author)
- University of Bristol
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- López-Cruz, O. (author)
- Instituto Nacional de Astrofísica, Óptica y Electrońica (INAOE),National Institute of Astrophysics, Optics and Electronics (INAOE)
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- Black, John H, 1949 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gunawan, D. (author)
- Universidad de Valparaíso,University of Valparaíso
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- Horellou, Cathy, 1967 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Magana, J. (author)
- Universidad de Valparaíso,University of Valparaíso
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(creator_code:org_t)
- 2018-08-14
- 2018
- English.
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In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8213 .- 2041-8205. ; 863:2
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Abstract
Subject headings
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- We present Atacama Large Millimeter/submillimeter Array measurements of the "Cosmic Seagull," a strongly magnified galaxy at z = 2.7779 behind the Bullet Cluster. We report CO(3-2) and continuum 344 μm (rest-frame) data at one of the highest differential magnifications ever recorded at submillimeter wavelengths (μ up to ∼50), facilitating a characterization of the kinematics of a rotational curve in great detail (at ∼620 pc resolution in the source plane). We find no evidence for a decreasing rotation curve, from which we derive a dynamical mass of (6.3 ± 0.7) × 1010Mowithin r = 2.6 ± 0.1 kpc. The discovery of a third, unpredicted, image provides key information for a future improvement of the lensing modeling of the Bullet Cluster and allows a measure of the stellar mass, , unaffected by strong differential magnification. The baryonic mass is expected to be dominated by the molecular gas content (fgas≤ 80 ± 20%) based on an mass estimated from the difference between dynamical and stellar masses. The star formation rate (SFR) is estimated via the spectral energy distribution (SFR = 190 ± 10 Moyr-1), implying a molecular gas depletion time of 0.25 ± 0.08 Gyr.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- galaxies: ISM
- galaxies: clusters: individual (1ES0657-558)
- galaxies: evolution
- gravitational lensing: strong
- submillimeter: galaxies
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Motta, V.
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Ibar, E.
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Verdugo, T.
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Molina, J.
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Hughes, T. M.
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Birkinshaw, M.
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show more...
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López-Cruz, O.
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Black, John H, 1 ...
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Gunawan, D.
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Horellou, Cathy, ...
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Magana, J.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Subatomic Physic ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Astrophysical Jo ...
- By the university
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Chalmers University of Technology