Updated models for the creation of a low-Z QSO absorber by a dwarf galaxy wind

Journal Article · Sat Nov 01 00:00:00 EDT 2014 · Astronomical Journal (New York, N.Y. Online)

DOI:https://doi.org/10.1088/0004-6256/148/5/103· OSTI ID:22342182

Keeney, Brian A.; Joeris, Peter; Stocke, John T.; Danforth, Charles W.

We present new GALEX images and optical spectroscopy of J1229+02, a dwarf post-starburst galaxy located 81 kpc from the 1585 km s{sup −1} absorber in the 3C 273 sight line. The absence of Hα emission and the faint GALEX UV fluxes confirm that the galaxy's recent star formation rate is <10{sup −3} M{sub ⊙} yr{sup −1}. Absorption-line strengths and the UV−optical SED give similar estimates of the acceptable model parameters for its youngest stellar population where f{sub m}<60% of its total stars (by mass) formed in a burst t{sub sb}=0.7–3.4 Gyr ago with a stellar metallicity of −1.7<[Fe/H]<+0.2; we also estimate the stellar mass of J1229+02 to be 7.3

• OSTI ID: 22342182
• Journal Information: Astronomical Journal (New York, N.Y. Online), Vol. 148, Issue 5; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABSORPTION
DATA
EMISSION
EVOLUTION
GALAXIES
IMAGES
IMPACT PARAMETER
MASS
METALLICITY
METALS
QUASARS
SPECTROSCOPY
STARS
STELLAR WINDS
VELOCITY