Abstract
Different cosmological models make specific predictions about the number of elliptical galaxies as a function of redshift1, so observations can in principle be used to discriminate between those models. Traditionally, elliptical galaxies have been thought to have formed in a single, rapid burst of star formation at high redshifts ( z > 5), and then evolved quietly—with no significant further star formation—since that time2,3. Yet evidence suggests that at least some ellipticals formed for the merger of two spiral galaxies4,5. It remains unclear which process dominates the formation of elliptical galaxies. Here I use the results of deep optical6 and near-infrared7,8,9,10 images to show that there are fewer galaxies with very red colours than predicted by models in which typical ellipticals have completed their star formation by z ≈ 5, which means that elliptical galaxies must have significant star formation at z < 5. This requirement, combined with constraints on bursts of star formation in lower-redshift galaxies11,12, and the observed properties of galaxies in the redshift range 0< z < 1 (refs 13,14,15,16,17), suggests either that ellipticals form at moderate redshifts, where a large initial burst of star formation is shrouded by dust, or that they form through the merging of smaller galaxies.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Fukugita, M., Hogan, C. J. & Peebles, P. J. E. The history of galaxies. Nature 381, 489–495 (1996).
Eggen, O. J., Lynden-Bell, D. & Sandage, A. R. Evidence from the motions of old stars that the galaxy collapsed. Astrophys. J. 136, 748–766 (1962).
Partridge, R. B. & Peebles, P. J. E. Are young galaxies visible? Astrophys. J. 147, 868–886 (1967).
Toomre, A. in The Evolution of Galaxies and Stellar Populations(eds Tinsley, B. M. & Larson, R. B.) 401–416 (Yale Univ. Observatory, New Haven, (1977)).
Schwezier, F. Colliding and merging galaxies III. The dynamically young merger remnant NGC 3921. Astron. J. 111, 109–129 (1996).
Williams, R. E. et al . The Hubble Deep Field: observations, data reduction, and galaxy photometry. Astron. J. 112, 1335–1389 (1996).
Hogg, D. W., Neugebauer, G., Armus, L., Matthews, K., Pahre, M. A., Soifer, B. T. & Weinberger, A. J. Near infrared imaging of the Hubble Deep Field with the Keck Telescope. Astron. J. 113, 474–482 (1997).
Dickinson, M. et al .(http://www.stsci.edu/ftp/science/hdf/hdf.html).
Moustakas, L. A., Davis, M., Graham, J. R., Silk, J., Peterson, B. & Yoshii, Y. Colors and K-band counts of extremely faint field galaxies. Astrophys. J. 475, 445–456 (1997).
Cowie, L. L., Gardner, J. P., IIu, E. M., Songaila, A., Hodapp, K.-W. & Wainscoat, R. J. The Hawaii K-band galaxy survey. I. Deep K-band imaging. Astrophys. J. 434, 114–127 (1994).
Madau, P., Ferguson, H. C., Dickinson, M. E., Giavalisco, M., Steidel, C. C. & Fruchter, A. High-redshift galaxies in the Hubble Deep Field: colour selection and star formation history to z ∼ 4. Mon. Not. R. Astron. Soc. 283, 1388–1404 (1996).
Steidel, C. C., Giavalisco, M., Dickinson, M. & Adelberger, K. I. Spectroscopy of Lyman break galaxies in the Hubble Deep Field. Astron. J. 112, 352–358 (1996).
Cowie, L. L., Songaila, A., Hu, E. M. & Cohen, J. G. New insight on galaxy formation and evolution from Keck spectroscopy of the Hawaii deep fields. Astron. J. 112, 839–864 (1996).
Kauffmann, G., Charlot, S. & White, S. D. M. Detection of strong evolution in the poulation of early-type galaxies. Mon. Not. R. Astron. Soc. 283, L117–L122 (1996).
Lilly, S. J., Tresse, L., Hammer, F., Crampton, D. & LeFevre, O. The Canada–France Redshift Survey. VI. Evolution of the galaxy luminosity function to z ∼ 1. Astrophys. J. 455, 108–124 (1995).
Worthey, G., Faber, S. M. & Gonzalez, J. J. Astrophys. J. 398, 69–73 (1992).
Ashman, K. M. & Zepf, S. E. Globular Cluster Systems(Cambridge University Press, in the press).
Gardner, J. P., Sharples, R. M., Frenk, C. S. & Carrasco, B. E. Awide field K-band survey. The luminosity function of galaxies. Astrophys. J. 480, L99–L103 (1997).
Ellis, R. S. Faint blue galaxies. Ann. Rev. Astron. Astrophys.(in the press).
Djorgovski, S. G. in New Light on Galaxy Evolution(eds Bender, R. & Davies, R. L.) 277–286 (Kluwer, Dordrecht, (1996)).
Meurer, G., Heckman, T. M., Lehnert, M. D., Leitherer, C. & Lowenthal, J. The panchromatic starburst intensity limit at low and high redshift. Astron. J. 114, 54–68 (1997).
Zepf, S. E. & Silk, J. On the effects of bursts of massive star formation during the evolution of ellipitcal galaxies. Astrophys. J. 466, 114–121 (1996).
Baugh, C. M., Cole, S. & Frenk, C. S. Evolution of the Hubble sequence in hierarchical models for galaxy formation. Mon. Not. R. Astron. Soc. 283, 1361–1378 (1996).
Cole, S., Aragon-Salamanca, A., Frenk, C. S., Navarro, J. F. & Zepf, S. E. Arecipe for galaxy formation. Mon. Not. R. Astron. Soc. 271, 781–806 (1994).
Kauffmann, G., Guiderdoni, B. & White, S. D. M. Faint galaxy counts in a hierarchical universe. Mon. Not. R. Astron. Soc. 267, 981–999 (1994).
Madau, P. Radiative transfer in a clumpy universe: the colors of high-redshift galaxies. Astrophys. J. 441, 18–27 (1995).
Bertin, E. & Arnouts, S. SExtractor: software for source extraction. Astron. Astrophys. Suppl. Ser. 117, 393–404 (1996).
Acknowledgements
I thank colleagues at Berkeley, Cambridge and Durham for stimulating conversations; L. Moustakas for assisting with the use of image analysis software; R. Bouwens for providing code to manipulate stellar populations models; and D. Hogg for providing data in tabular form. This work has been supported by NASA grants.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zepf, S. Formation of elliptical galaxies at moderate redshifts. Nature 390, 377–379 (1997). https://doi.org/10.1038/37065
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/37065
This article is cited by
-
The James Webb Space Telescope
Space Science Reviews (2006)
-
Old galaxies in the young Universe
Nature (2004)
-
Vigorous star formation hidden by dust in a galaxy at a redshift of 1.4
Nature (1998)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.