WIKISKY.ORG

To Survive in the Universe

HD 23128

Contents

Images
Related articles
Related links
Groups

Images

Upload your image

DSS Images Other Images

Related articles

UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue. Not Available
UBV(RI)c photometry of some standard sequences in the Harvard F regions and in the Magellanic Clouds Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1988MNRAS.231.1047M&db_key=AST
Standard Stars for VRI Photometry with S25 Response Photocathodes Not Available
Isolated Stroemgren spheres as a source of galactic H alpha emission The isolated H alpha emission features reported by Reynolds et al. areidentified with Stroemgren spheres surrounding observed O stars; theroot mean square electron densities and Stroemgren radii are calculatedfrom the observed emission measure and stellar type. The density has anaverage value of 2 per cu cm but increases to 3.3 per cu cm for starswithin 200 pc of the galactic plane. An analysis of the Catalogue ofGalactic O Stars shows that enhanced H alpha emission is observed aroundall known O stars. The diffuse component of H alpha emission is what onewould expect from the line-of-sight overlapping of isolated Stroemgrenspheres surrounding B stars and appears to correlate with features onextinction maps, as derived. There is no compelling reason to suggestany large-scale intercloud ionization from H alpha data alone.
Further observations of magnitude with a coarse grating Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1952MNRAS.112..665W&db_key=AST

Submit a new article

Related links

- No Links Found -

Submit a new link

Member of following groups:

Observation and Astrometry data

Constellation:	Hydrus
Right ascension:	03^h36^m12.24^s
Declination:	-73Â°58'25.7"
Apparent magnitude:	7.627
Distance:	214.592 parsecs
Proper motion RA:	28.2
Proper motion Dec:	63.2
B-T magnitude:	9.067
V-T magnitude:	7.746

Catalogs and designations:

Proper Names	(Edit)
HD 1989	HD 23128
TYCHO-2 2000	TYC 9158-876-1
USNO-A2.0	USNO-A2 0150-01544711
HIP	HIP 16797

→ Request more catalogs and designations from VizieR