Search: onr:"swepub:oai:lup.lub.lu.se:dd1a3d1f-8538-4f5e-abc6-bade0211d972" >
Two Orders of Magni...
Two Orders of Magnitude Variation in the Star Formation Efficiency across the Premerger Galaxy NGC 2276
-
- Tomičić, Neven (author)
- Max Planck Institute for Astronomy
-
- Hughes, Annie (author)
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE),University of Toulouse
-
- Kreckel, Kathryn (author)
- Max Planck Institute for Astronomy
-
show more...
-
- Renaud, Florent (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
-
- Pety, Jérôme (author)
- Institut de Radioastronomie Millimétrique IRAM
-
- Schinnerer, Eva (author)
- Max Planck Institute for Astronomy
-
- Saito, Toshiki (author)
- Max Planck Institute for Astronomy
-
- Querejeta, Miguel (author)
- European Southern Observatory
-
- Faesi, Christopher M. (author)
- Max Planck Institute for Astronomy
-
- Garcia-Burillo, Santiago (author)
- Royal Observatory of Madrid
-
show less...
-
(creator_code:org_t)
- 2018-12-21
- 2018
- English.
-
In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 869:2
- Related links:
-
http://dx.doi.org/10... (free)
-
show more...
-
https://doi.org/10.3...
-
https://lup.lub.lu.s...
-
https://doi.org/10.3...
-
show less...
Abstract
Subject headings
Close
- We present the first spatially resolved (∼0.5 kpc) measurements of the molecular gas depletion time τ depl across the disk of the interacting spiral galaxy NGC 2276, a system with an asymmetric morphology in various star formation rate (SFR) tracers. To estimate τ depl, we use new NOEMA observations of the 12CO(1-0) emission tracing the bulk molecular gas reservoir in NGC 2276, and extinction-corrected Hα measurements obtained with the PMAS/PPaK integral field unit for robust estimates of the SFR. We find a systematic decrease in τ depl of 1-1.5 dex across the disk of NGC 2276, with a further, abrupt drop in τ depl of ∼1 dex along the galaxy's western edge. The global τ depl in NGC 2776 is τdepl = 0.55 Gyr, consistent with literature measurements for the nearby galaxy population. Such a large range in τ depl on subkiloparsec scales has never previously been observed within an individual isolated or premerger system. When using a metallicity-dependent molecular gas conversion factor the variation decreases by 0.5 dex. We attribute the variation in τ depl to the influence of galactic-scale tidal forces and ram pressure on NGC 2276's molecular interstellar medium. Our observations add to the growing body of numerical and observational evidence that galaxy-galaxy interactions significantly modify the molecular gas properties and star-forming activity within galactic disks throughout the interaction, and not just during the final merger phase.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- galaxies: individual (NGC 2276)
- galaxies: ISM
- galaxies: star formation
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
-
Tomičić, Neven
-
Hughes, Annie
-
Kreckel, Kathryn
-
Renaud, Florent
-
Pety, Jérôme
-
Schinnerer, Eva
-
show more...
-
Saito, Toshiki
-
Querejeta, Migue ...
-
Faesi, Christoph ...
-
Garcia-Burillo, ...
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Astrophysical Jo ...
- By the university
-
Lund University