English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Millimeter Mapping at z~1: Dust-obscured bulge building and disk growth

Nelson, E. J., Tadaki, K.-i., Tacconi, L. J., Lutz, D., Foerster Schreiber, N. M., Cibinel, A., et al. (2019). Millimeter Mapping at z~1: Dust-obscured bulge building and disk growth. The Astrophysical Journal, 870(2): 130. doi:10.3847/1538-4357/aaf38a.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0006-5EF6-C Version Permalink: http://hdl.handle.net/21.11116/0000-0006-5EF7-B
Genre: Journal Article

Files

show Files
hide Files
:
Millimeter Mapping at z~1 Dust-obscured Bulge Building and Disk Growth.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
Millimeter Mapping at z~1 Dust-obscured Bulge Building and Disk Growth.pdf
Description:
-
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Nelson, Erica J.1, Author              
Tadaki, Ken-ichi, Author
Tacconi, Linda J.1, Author              
Lutz, Dieter1, Author              
Foerster Schreiber, Natascha M.1, Author              
Cibinel, Anna, Author
Wuyts, Stijn, Author
Lang, Philipp, Author
Leja, Joel, Author
Montes, Mireia, Author
Oesch, Pascal A., Author
Belli, Sirio1, Author              
Davies, Rebecca L.1, Author              
Davies, Richard I.1, Author              
Genzel, Reinhard1, Author              
Lippa, Magdalena1, Author              
Price, Sedona H.1, Author              
Übler, Hannah1, Author              
Wisnioski, Emily1, Author              
Affiliations:
1Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889              

Content

show
hide
Free keywords: -
 Abstract: A randomly chosen star in today’s universe is most likely to live in a galaxy with stellar mass between the Milky Way and Andromeda. It remains uncertain, however, how the structural evolution of these bulge-disk systems proceeded. Most of the unobscured star formation we observe by building Andromeda progenitor s at 0.7 < z < 1.5 occurs in disks, but ≳90% of their star formation is reprocessed by dust and remains unaccounted for. Here we map rest-500 μm dust continuum emission in an Andromeda progenitor at z = 1.25 to probe where it is growing through dust-obscured star formation. Combining resolved dust measurements from the NOthern Extended Millimeter Array interferometer with Hubble Space Telescope Hα maps and multicolor imaging (including new data from the Hubble Deep UV Legacy Survey, HDUV), we find a bulge growing by dust- obscured star formation: while the unobscured star formation is centrally suppressed, the dust continuum is centrally concentrated, filling the ring-like structure that is evident in the Hα and UV emission. Reflecting this, the dust emission is more compact than the optical/UV tracers of star formation with r e (dust) = 3.4 kpc, r e (Hα)/r e (dust) = 1.4, and r e (UV)/r e (dust) = 1.8. Crucially, however, the bulge and disk of this galaxy are building simultaneously; although the dust emission is more compact than the rest-optical emission (r e (optical)/r e (dust) = 1.4), it is somewhat less compact than the stellar mass (r e (M *)/r e (dust) = 0.9). Taking the rest-500 μm emission as a tracer, the expected structural evolution can be accounted for by star formation: it will grow in size by ∆r e /∆M * ̃ 0.3 and in central surface density by ∆Σcen/∆M * ̃ 0.9. Finally, our observations are consistent with a picture in which merging and disk instabilities drive gas to the center of galaxies, boosting global star formation rates above the main sequence and building bulges.

Details

show
hide
Language(s):
 Dates: 2019-01-16
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.3847/1538-4357/aaf38a
Other: LOCALID: 3230126
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: The Astrophysical Journal
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 870 (2) Sequence Number: 130 Start / End Page: - Identifier: -