- ID:
- ivo://CDS.VizieR/J/ApJ/650/148
- Title:
- GOODS blue early-type galaxies
- Short Name:
- J/ApJ/650/148
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a study of the nature of the blue early-type galaxies (BEGs) in the GOODS North and South fields using the GOODS archival HST ACS data. Using visual inspection, we have selected 58 BEGs and 113 normal red early-type galaxies (REGs) in the sample of 1949 galaxies with spectroscopic redshifts. We find that the BEGs are generally bluer, fainter, and less massive than the REGs, although a few BEGs are exceptionally bright and massive. The number fraction of BEGs to total early-type galaxies is almost constant (~0.3) at z<=1.1. In addition, we find that the sizes of the BEGs in a given redshift bin decrease as redshift decreases. The BEGs look similar to the REGs in the images and surface brightness profiles.
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Search Results
- ID:
- ivo://CDS.VizieR/J/MNRAS/371/1891
- Title:
- GOODS ELAIS-N1 24um flux densities
- Short Name:
- J/MNRAS/371/1891
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We address the question of how to deal with confusion-limited surveys in the mid-infrared (MIR) domain by using information from shorter-wavelength observations over the same sky regions. Such information, once applied to apparently extended MIR sources, which are indeed 'blends' of two or more different sources, allow us to disentangle the single counterparts and to split the measured flux density into different components. We present the application of this method to the 24-{mu}m Spitzer archival data in the Great Observatories Origins Deep Survey ELAIS-N1 (GOODS EN1) test field, where apparently extended, 'blended' sources constitute about 20 per cent of a reliable sample of 983 sources detected above the 5{sigma} threshold down to 40uJy. As a shorter-wavelength data set, we have considered the public Infrared Array Camera (IRAC) images and catalogues of the same field. We show that the 24-{mu}m sample is almost unbiased down to ~40uJy and the careful application of the deblending procedure does not require any statistical completeness correction (at least at the flux level considered). This is probed by direct comparison of our results with results in the literature that analysed the same data set through extensive Monte Carlo simulations. The extrapolation of the source counts down to fainter fluxes suggests that our 24-{mu}m sample is able to resolve ~62 per cent of the cosmic background down to a flux level of 38uJy.
- ID:
- ivo://CDS.VizieR/J/A+A/533/A119
- Title:
- GOODS-Herschel North and South catalogs
- Short Name:
- J/A+A/533/A119
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the deepest 100 to 500{mu}m far-infrared observations obtained with the Herschel Space Observatory as part of the GOODS-Herschel key program, and examine the infrared (IR) 3-500{mu}m spectral energy distributions (SEDs) of galaxies at 0<z<2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, and AKARI data. We determine the projected star formation densities of local galaxies from their radio and mid-IR continuum sizes.
7514. GOODS initial results
- ID:
- ivo://CDS.VizieR/II/261
- Title:
- GOODS initial results
- Short Name:
- II/261
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present initial results from the Great Observatories Origins Deep Survey (GOODS) that are primarily, but not exclusively, based on multiband imaging data obtained with the Hubble Space Telescope and the Advanced Camera for Surveys (ACS). The survey covers roughly 320 arcmin2 in the ACS F435W, F606W, F814W, and F850LP bands, divided into two well-studied fields. Existing deep observations from the Chandra X-Ray Observatory and ground-based facilities are supplemented with new, deep imaging in the optical and near-infrared from the European Southern Observatory and from the Kitt Peak National Observatory. Deep observations with the Space Infrared Telescope Facility are scheduled. Reduced data from all facilities are being released worldwide within 36 months of acquisition. Together, this data set provides two deep reference fields for studies of distant normal and active galaxies, supernovae, and faint stars in our own Galaxy. This Letter serves to outline the survey strategy and describe the specific data that have been used in the accompanying letters, summarizing the reduction procedures and sensitivity limits.
- ID:
- ivo://CDS.VizieR/J/ApJ/697/1369
- Title:
- GOODS Ks-selected multiwavelength compilations
- Short Name:
- J/ApJ/697/1369
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Ks-selected multiwavelength compilations in GOODS.
- ID:
- ivo://CDS.VizieR/J/ApJ/666/863
- Title:
- GOODS MIPS early-type galaxies
- Short Name:
- J/ApJ/666/863
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We measure the obscured star formation in z~1 early-type galaxies. This constrains the influence of star formation on their optical/near-IR colors, which, we found, are redder than predicted by the model by Bruzual & Charlot (2003MNRAS.344.1000B). From deep ACS imaging we construct a sample of 95 morphologically selected early-type galaxies in the HDF-N and CDF-S with spectroscopic redshifts in the range 0.85<z<1.15. We measure their 24um fluxes from the deep GOODS MIPS imaging and derive the IR luminosities and star formation rates (SFRs).
- ID:
- ivo://CDS.VizieR/VII/246
- Title:
- GOODS Morphological Catalog
- Short Name:
- VII/246
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present below the morphological catalogs of galaxies in the GOODS North and South fields, as determined visually by R. S. Ellis with a magnitude limit from HST/ACS imaging of z<22.5 (AB).
- ID:
- ivo://CDS.VizieR/J/A+A/504/751
- Title:
- GOODS-MUSIC catalog updated version
- Short Name:
- J/A+A/504/751
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The goal of this work is to infer the star formation properties and the mass assembly process of high redshift (0.3<=z<2.5) galaxies from their IR emission using the 24 micron band of MIPS-Spitzer. We used an updated version of the GOODS-MUSIC catalog, which has multiwavelength coverage from 0.3 to 24 micron and either spectroscopic or accurate photometric redshifts. We describe how the catalog has been extended by the addition of mid-IR fluxes derived from the MIPS 24 micron image. We compared two different estimators of the star formation rate (SFR hereafter). One is the total infrared emission derived from 24 micron, estimated using both synthetic and empirical IR templates. The other one is a multiwavelength fit to the full galaxy SED, which automatically accounts for dust reddening and age-star formation activity degeneracies. For both estimates, we computed the SFR density and the specific SFR. We show that the two SFR indicators are roughly consistent, once the uncertainties involved are taken into account. However, they show a systematic trend, IR-based estimates exceeding the fit-based ones as the star formation rate increases. With this new catalog, we show that: a) at z>0.3, the star formation rate is correlated well with stellar mass, and this relationship seems to steepen with redshift if one relies on IR-based estimates of the SFR; b) the contribution to the global SFRD by massive galaxies increases with redshift up to ~2.5, more rapidly than for galaxies of lower mass, but appears to flatten at higher z; c) despite this increase, the most important contributors to the SFRD at any z are galaxies of about, or immediately lower than, the characteristic stellar mass; d) at z~2, massive galaxies are actively star-forming, with a median SFR ~ 300M_{sun}_/yr. During this epoch, our targeted galaxies assemble a substantial part of their final stellar mass; e) the specific SFR (SSFR) shows a clear bimodal distribution. The analysis of the SFR density and the SSFR seems to support the downsizing scenario, according to which high mass galaxies have formed their stars earlier and more rapidly than their low mass counterparts. A comparison with renditions of theoretical simulations of galaxy formation and evolution indicates that these models follow the global increase in the SSFR with redshift and predict the existence of quiescent galaxies even at z>1.5. However, the average SSFR is systematically underpredicted by all models considered.
- ID:
- ivo://CDS.VizieR/J/A+A/449/951
- Title:
- GOODS-MUSIC sample: multicolour catalog
- Short Name:
- J/A+A/449/951
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a high quality multiwavelength (from 0.3 to 8.0 micron) catalog of the large and deep area in the GOODS Southern Field covered by the deep near-IR observations obtained with the ESO VLT. The catalog is entirely based on public data: in our analysis, we have included the F435W, F606W, F775W and F850LP ACS images, the JHKs VLT data, the Spitzer data provided by IRAC instrument (3.6, 4.5, 5.8 and 8.0 micron), and publicly available U-band data from the 2.2ESO and VLT-VIMOS. We describe in detail the procedures adopted to obtain this multiwavelength catalog. In particular, we developed a specific software for the accurate "PSF-matching" of space and ground-based images of different resolution and depth (ConvPhot), of which we analyse performances and limitations. We have included both z-selected, as well as Ks-selected objects, yielding a unique, self-consistent catalog. The largest fraction of the sample is 90% complete at z~26 or Ks~23.8 (AB scale). Finally, we cross-correlated our data with all the spectroscopic catalogs available to date, assigning a spectroscopic redshift to more than 1000 sources. The final catalog is made up of 14847 objects, at least 72 of which are known stars, 68 are AGNs, and 928 galaxies with spectroscopic redshift (668 galaxies with reliable redshift determination). We applied our photometric redshift code to this data set, and the comparison with the spectroscopic sample shows that the quality of the resulting photometric redshifts is excellent, with an average scatter of only 0.06. The full catalog, which we named GOODS-MUSIC (MUltiwavelength Southern Infrared Catalog), including the spectroscopic information, is made publicly available, together with the software specifically designed to this end.
- ID:
- ivo://CDS.VizieR/J/A+A/619/A48
- Title:
- GOODS-N AGN VLBI detect. & radio properties
- Short Name:
- J/A+A/619/A48
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Conventional radio surveys of deep fields ordinarily have arc-second scale resolutions often insufficient to reliably separate radio emission in distant galaxies originating from star-formation and AGN-related activity. Very long baseline interferometry (VLBI) can offer a solution by identifying only the most compact radio emitting regions in galaxies at cosmological distances where the high brightness temperatures (in excess of 10^5^K) can only be reliably attributed to AGN activity.The newest VLBI techniques are used to completely cover an entire 7.5' radius area to milliarcsecond resolutions, while bright radio sources (S>0.1mJy) are targeted up to 25-arcmin from the pointing centre. Multi-source self-calibration, and a primary beam model for the EVN array are used to correct for residual phase errors and primary beam attenuation respectively. This paper presents the largest catalogue of VLBI detected sources in GOODS-N comprising of 31 compact radio sources across a redshift range of 0.11-3.44, almost three times more than previous VLBI surveys in this field.