Hubble Space TelescopeImaging of the Poststarburst Quasar UN J1025−0040: Evidence for Recent Star Formation
نویسندگان
چکیده
منابع مشابه
An Extended Star Formation History for the Galactic Center from Hubble Space Telescope/NICMOS Observations
We present Hubble Space Telescope (HST) Near-Infrared Camera and Multiobject Spectrometer (NICMOS) observations as evidence that continuous star formation has created much of the central stellar cusp of the Galaxy. The data are the deepest ever obtained for a Galactic Center (GC) population, being >50% complete for mF205W< 19.3, or initial stellar masses &2 M⊙. We use Geneva and Padova stellar ...
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Galaxy evolution is likely to be shaped by negative feedback from active galactic nuclei (AGN). In the whole range of redshifts and luminosities studied so far, galaxies hosting an AGN frequently show fast and extended outflows consisting in both ionized and molecular gas. Such outflows could potentially quench the start formation within the host galaxy, but a clear evidence of negative feedbac...
متن کاملModes of Star Formation along the Hubble Sequence and Beyond
I assess the similarities and differences between the star-formation modes in quiescent spiral galaxies versus those in violent starburst regions. As opposed to the quiescent star-formation mode in spiral galaxies, current empirical evidence on the star-formation processes in the extreme, high-pressure environments induced by galaxy encounters strongly suggests that star cluster formation is an...
متن کاملThe evolution of star formation in quasar host galaxies
We have used far-infrared data from IRAS, ISO, SWIRE, SCUBA and MAMBO to constrain statistically the mean far-infrared luminosities of quasars. Our quasar compilation at redshifts 0 < z < 6.5 and I-band luminosities −20 < IAB < −32 is the first to distinguish evolution from quasar luminosity dependence in such a study. We carefully cross-calibrate IRAS against Spitzer and ISO, finding evidence ...
متن کامل[o Ii] Emission in Quasar Host Galaxies: Evidence for a Suppressed Star Formation Efficiency
The [O II] λ3727 line, a commonly used estimator of star formation rate in extragalactic surveys, should be an equally effective tracer of star formation in the host galaxies of quasars, whose narrow-line regions are expected to produce weak low-ionization emission. Quasar spectra generally show little or no [O II] emission beyond that expected from the active nucleus itself. The inferred star ...
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ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 2002
ISSN: 0004-6280,1538-3873
DOI: 10.1086/341690