Home > Research > Publications & Outputs > The KMOS Redshift One Spectroscopic Survey (KROSS)

Electronic data

  • 1701.05561v1

    Rights statement: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version C. M. Harrison, H. L. Johnson, A. M. Swinbank, J. P. Stott, R. G. Bower, Ian Smail, A. L. Tiley, A. J. Bunker, M. Cirasuolo, D. Sobral, R. M. Sharples, P. Best, M. Bureau, M. J. Jarvis, G. Magdis; The KMOS Redshift One Spectroscopic Survey (KROSS): rotational velocities and angular momentum of z ≈ 0.9 galaxies. Mon Not R Astron Soc 2017; 467 (2): 1965-1983. doi: 10.1093/mnras/stx217 is available online at: https://academic.oup.com/mnras/article/2972999/The

    Accepted author manuscript, 1 MB, PDF-document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

View graph of relations

The KMOS Redshift One Spectroscopic Survey (KROSS): rotational velocities and angular momentum of z~0.9 galaxies

Research output: Contribution to journalJournal article

Published
  • C. M. Harrison
  • H. L. Johnson
  • A. M. Swinbank
  • J. P. Stott
  • R. G. Bower
  • Ian Smail
  • A. L. Tiley
  • A. J. Bunker
  • M. Cirasuolo
  • D. Sobral
  • R. M. Sharples
  • P. Best
  • M. Bureau
  • M. J. Jarvis
  • G. Magdis
Close
<mark>Journal publication date</mark>1/05/2017
<mark>Journal</mark>Monthly Notices of the Royal Astronomical Society
Issue number2
Volume467
Number of pages19
Pages (from-to)1965-1983
Publication statusPublished
Early online date7/02/17
Original languageEnglish

Abstract

We present dynamical measurements for 586 H-alpha detected star-forming galaxies from the KMOS (K-band Multi-Object Spectrograph) Redshift One Spectroscopic Survey (KROSS). The sample represents typical star-forming galaxies at this redshift (z=0.6-1.0), with a median star formation rate of ~7 Msol/yr and a stellar mass range of log[M/Msol]~9-11. We find that the rotation velocity-stellar mass relationship (the inverse of the Tully-Fisher relationship) for our rotationally-dominated sources (v/sigma>1) has a consistent slope and normalisation as that observed for z=0 disks. In contrast, the specific angular momentum (j; angular momentum divided by stellar mass), is ~0.2-0.3 dex lower on average compared to z=0 disks. The specific angular momentum scales as M^[0.6+/-0.2], consistent with that expected for dark matter (i.e., proportional to M^[2/3]). We find that z~0.9 star-forming galaxies have decreasing specific angular momentum with increasing Sersic index. Visually, the sources with the highest specific angular momentum, for a given mass, have the most disk-dominated morphologies. This implies that an angular momentum-mass-morphology relationship, similar to that observed in local massive galaxies, is already in place by z~1.

Bibliographic note

This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version C. M. Harrison, H. L. Johnson, A. M. Swinbank, J. P. Stott, R. G. Bower, Ian Smail, A. L. Tiley, A. J. Bunker, M. Cirasuolo, D. Sobral, R. M. Sharples, P. Best, M. Bureau, M. J. Jarvis, G. Magdis; The KMOS Redshift One Spectroscopic Survey (KROSS): rotational velocities and angular momentum of z ≈ 0.9 galaxies. Mon Not R Astron Soc 2017; 467 (2): 1965-1983. doi: 10.1093/mnras/stx217 is available online at: https://academic.oup.com/mnras/article/2972999/The Re-submitted to MNRAS after addressing referee's comments. Table of values and extended figures available at: http://astro.dur.ac.uk/KROSS/