Astronomy and Astrophysics – Astronomy
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.1102c&link_type=abstract
American Astronomical Society Meeting 202, #11.02; Bulletin of the American Astronomical Society, Vol. 35, p.714
Astronomy and Astrophysics
Astronomy
Scientific paper
We have used the KPNO 4m telescope and CCD Mosaic to measure Hα emission from the well-studied cluster Abell 851 (Cl 0939+4713) at z=0.40. Hα is a more reliable star-formation tracer than the more accessible [O II] λ 3727 doublet, and their comparison is relevant to estimates of star formation at higher redshift. A z-band image was used for continuum measurement. The greatest Hα EW values are found among low-luminosity compact systems. Comparing to local samples, and using the MORPHS Hubble types in the cluster core, Sbc and later spirals in Abell 851 have weaker Hα +[N II] emission than in nearby (field and Virgo) galaxies. This is broadly consistent with a picture in which star formation is quenched as spirals join the cluster. Earlier Hubble types (E-Sab) show, in addition, a tail of high-EW systems, indicating local and recent star-formation events. These are generally the same ones with mid-UV detections. These data also let us address the spatial distribution of strong-emission galaxies close to the cluster redshift out to a radius of 2.5 Mpc from the core.
Covington C. E.
Keel William C.
Morrison Glenn Evan
Odewahn Stephen C.
Owen Frazer N.
No associations
LandOfFree
An Hα Survey of the Butcher-Oemler Cluster Abell 851 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An Hα Survey of the Butcher-Oemler Cluster Abell 851, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Hα Survey of the Butcher-Oemler Cluster Abell 851 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1366892