MASSIVE GALAXIES IN COSMOS: EVOLUTION OF BLACK HOLE VERSUS BULGE MASS BUT NOT VERSUS TOTAL STELLAR MASS OVER THE LAST 9 Gyr?

Jahnke, K.; Bongiorno, A.; Brusa, M.; Capak, P.; Cappelluti, N.; Cisternas, Mauricio; Civano, F.; Colbert, James; Comastri, A.; Elvis, M.; Hasinger, G.; Ilbert, O.; Impey, C. D.; Inskip, K. J.; Koekemoer, Anton M.; Lilly, S. J.; Maier, C.; Merloni, A.; Riechers, Dominik A.; Salvato, M.; Schinnerer, E.; Scoville, N. Z.; Silverman, John D.; Taniguchi, Y.; Trump, Jonathan R.; Yan, Lin

doi:10.1088/0004-637x/706/2/l215

Cited by 203 publications

(250 citation statements)

References 47 publications

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“…This contributes to the color difference, i.e., bluer color of QSO hosts compared to that of inactive galaxies, at the highest galaxy luminosities. This result for the luminous QSOs is in agreement with the suggestion (see Kauffmann et al 2003;Jahnke et al 2009;Matsuoka et al 2014) that the most massive QSO host galaxies (those with Mi ∼< -22) are bluer, and thus more star-forming, than inactive galaxies of similar luminosity. Both quasar hosts and 3 http://www.mpa-garching.mpg.de/SDSS/…”

Section: Colors Of Qso Host Galaxiessupporting

confidence: 91%

Low-redshift quasars in the SDSS Stripe 82. Host galaxy colours and close environment

Bettoni

Falomo

Kotilainen

et al. 2015

Mon. Not. R. Astron. Soc.

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We present a photometrical and morphological multicolor study of the properties of low redshift (z<0.3) quasar hosts based on a large and homogeneous dataset of quasars derived from the Sloan Digital Sky Survey (DR7). We used quasars that were imaged in the SDSS Stripe82 that is up to 2 mag deeper than standard Sloan images. This sample is part of a larger dataset of ∼400 quasars at z < 0.5 for which both the host galaxies and their galaxy environments were studied Karhunen et al. 2014). For 52 quasars we undertake a study of the color of the host galaxies and of their close environments in u, g, r, i and z bands. We are able to resolve almost all the quasars in the sample in the filters g, r, i and z and also in u for about 50% of the targets. We found that the mean colors of the QSO host galaxy (g − i=0.82±0.26; r − i=0.26±0.16 and u − g=1.32±0.25) are very similar to the values of a sample of inactive galaxies matched in terms of redshift and galaxy luminosity with the quasar sample. There is a suggestion that the most massive QSO hosts have bluer colors. Both quasar hosts and the comparison sample of inactive galaxies have candidates of close (< 50 kpc) companion galaxies for ∼ 30% of the sources with no significant difference between active and inactive galaxies. We do not find significant correlation between the central black hole (BH) mass and the quasar host luminosity that appears to be extra luminous at a given BH mass with respect to the local relation (M BH -M host ) for inactive galaxies. This confirms previous suggestion that a substantial disc component, not correlated to the BH mass, is present in the galaxies hosting low z quasars. These results support a scenario where the activation of the nucleus has negligible effects on the global structural and photometrical properties of the hosting galaxies.

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Section: Colors Of Qso Host Galaxiessupporting

confidence: 91%

Low-redshift quasars in the SDSS Stripe 82. Host galaxy colours and close environment

Bettoni

Falomo

Kotilainen

et al. 2015

Mon. Not. R. Astron. Soc.

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“…In order to estimate the possible effect of the contribution of the host-galaxy stellar light to the 2500 Å luminosity, we have considered a subsample of 241 sources for which we have a host-galaxy contribution computed subtracting a point-spreadfunction scaled to a central 4 pixel aperture, and measuring the extended flux in ACS F814W (Jahnke et al 2004;Jahnke et al 2009): 145 sources have an extended host-galaxy contribution of less than 10%, while for 96 AGN the contamination of the host-galaxy light is greater than 10%. This is a robust, model independent measure to determine whether substantial extended flux is present or not.…”

Section: Host-galaxy Contaminationmentioning

confidence: 99%

The X-ray to optical-UV luminosity ratio of X-ray selected type 1 AGN in XMM-COSMOS

Lusso

Comastri

Vignali

et al. 2010

A&A

372

284

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We present a study of the X-ray to optical properties of a sample of 545 X-ray selected type 1 AGN, from the XMM-COSMOS survey, over a wide range of redshifts (0.04 < z < 4.25) and X-ray luminosities (40.6 ≤ Log L [2−10] keV ≤ 45.3). About 60% of them are spectroscopically identified type 1 AGN, while the others have a reliable photometric redshift and are classified as type 1 AGN on the basis of their multi-band Spectral Energy Distributions. We discuss the relationship between UV and X-ray luminosity, as parameterized by the α ox spectral slope, and its dependence on redshift and luminosity. We compare our findings with previous investigations of optically selected broad-line AGN (mostly from SDSS). A highly significant correlation between α ox and L 2500 Å is found, in agreement with previous investigations of optically selected samples. We calculate bolometric corrections, k bol , for the whole sample using hard X-ray luminosities (L [2−10] keV ), and the Eddington ratios for a subsample of 150 objects for which black hole mass estimates are available. We confirm the trend of increasing bolometric correction with increasing Eddington ratio as proposed in previous works. A tight correlation is found between α ox and k bol , which can be used to estimate accurate bolometric corrections using only optical and X-ray data. We find a significant correlation between α ox and Eddington ratio, in which the ratio between X-ray and optical flux decreases with increasing Eddington ratio.

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“…Broad-band imaging studies of QSO hosts have successfully used a two-dimensional analytical modelling scheme to decompose the point-like nucleus and different spatial extended host components to study the properties of QSO host galaxies (e.g. McLure et al 1999;Kuhlbrodt et al 2004;Sánchez et al 2004b;Kim et al 2008;Jahnke et al 2009). …”

Section: Ifu Decomposition Of Host and Qso Emissionmentioning

confidence: 99%

Mapping the ionised gas around the luminous QSO HE 1029-1401: evidence for minor merger events?

Sánchez

Wisotzki²,

Jahnke

et al. 2010

A&A

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We present VIMOS integral field spectroscopy of the brightest radio-quiet QSO on the southern sky HE 1029-1401 at a redshift of z = 0.086. Standard decomposition techniques for broad-band imaging are extended to integral field data in order to deblend the QSO and host emission. We perform a tentative analysis of the stellar continuum, finding a young stellar population (<100 Myr) or a featureless continuum embedded in an old stellar population (10 Gyr) typical for a massive elliptical galaxy. The stellar velocity dispersion of σ * = 320 ± 90 km s −1 and the estimated black hole mass log(M BH /M ) = 8.7 ± 0.3 are consistent with the local M BH -σ * relation within the errors. For the first time, we map the two-dimensional ionised gas distribution and the gas velocity field around HE 1029-1401. While the stellar host morphology is purely elliptical, we find a highly structured distribution of ionised gas out to 16 kpc from the QSO. The gas is highly ionised solely by the QSO radiation and has a significantly lower metallicity than would be expected for the stellar mass of the host, indicating an external origin of the gas most likely due to minor mergers. We find a rotating gas disc around the QSO and a dispersion-dominated non-rotating gas component within the central 3 kpc. At larger distances the velocity field is heavily disturbed, which could be interpreted as another signature of past minor merger events. Alternatively, the arc-like structure seen in the ionised gas might also be indicative of a large-scale expanding bubble, centred on and possibly driven by the active nucleus.

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MASSIVE GALAXIES IN COSMOS: EVOLUTION OF BLACK HOLE VERSUS BULGE MASS BUT NOT VERSUS TOTAL STELLAR MASS OVER THE LAST 9 Gyr?

Cited by 203 publications

References 47 publications

Low-redshift quasars in the SDSS Stripe 82. Host galaxy colours and close environment

Low-redshift quasars in the SDSS Stripe 82. Host galaxy colours and close environment

The X-ray to optical-UV luminosity ratio of X-ray selected type 1 AGN in XMM-COSMOS

Mapping the ionised gas around the luminous QSO HE 1029-1401: evidence for minor merger events?

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