SIMBAD references

2000A&A...357..101K - Astronomy and Astrophysics, volume 357, 101-110 (2000/5-1)

HS 0822+3542 - a new nearby extremely metal-poor galaxy.

KNIAZEV A.Y., PUSTILNIK S.A., MASEGOSA J., MARQUEZ I., UGRYUMOV A.V., MARTIN J.-M., IZOTOV Y.I., ENGELS D., BROSCH N., HOPP U., MERLINO S. and LIPOVETSKY V.A.

Abstract (from CDS):

We present the results of spectrophotometry and BVR CCD photometry, as well as integrated HI radio measurements of a new blue compact galaxy (BCG) HS 0822+3542 with extremely low oxygen abundance: 12+log(O/H)=7.35, or 1/36 of solar value. The galaxy is the third most metal-deficient BCG after I Zw 18 and SBS 0335-052. Its very high mass fraction of gas (≃95% of all visible mass) and blue colours of underlying nebulosity are also similar to those of SBS 0335-052. This suggests that HS 0822+3542 is one of the nearest and dimmest galaxies experiencing a recently-started first star formation (SF) episode. Its properties imply that for such galaxies there is a linear scaling of the main parameters, at least for the baryon mass range (0.3-20)x108M. The total mass estimate indicates that the galaxy is dynamically dominated by a dark matter (DM) halo, which itself is one of the least massive for galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: fundamental parameters - galaxies: individual: HS 0822+3542 - galaxies: starburst - galaxies: photometry

Status at CDS:  

Simbad objects: 12

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2020.03.31-10:23:02

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