The Milky Way like galaxy NGC 6384 and its nuclear star cluster at high NIR spatial resolution using LBT/ARGOS commissioning data

Georgiev, Iskren Y.; Neumayer, Nadine; Gässler, W.; Rabien, S.; Busoni, Lorenzo; Bonaglia, Marco; Ziegleder, J.; Xivry, Gilles Orban de; Peter, D.; Kulas, M.; Borelli, J. L.; Rahmer, Gustavo; Lefebvre, Michael; Baumgardt, Holger

doi:10.1093/mnras/stz227

Cited by 12 publications

(10 citation statements)

References 97 publications

(134 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…25 We exploit this data to look for the possible presence of multiple lensed images of the quasar generated by the presence of the z=0.711 elliptical galaxy located 1 6 NNE from the quasar (see Section 5.7). First, we construct a spatially variable PSF model and evaluate it at the quasar location; for further details, see Farina et al (2018) and Georgiev et al (2019). Next, we use this model to subtract both the emission from both the quasar and the close-by galaxy using the GALFIT v3.0.5 package (Peng et al 2010(Peng et al , 2011; see also our Figure 16).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The REQUIEM Survey. I. A Search for Extended Lyα Nebular Emission Around 31 z > 5.7 Quasars

Farina

Battaia

Costa

et al. 2019

ApJ

Self Cite

103

143

View full text Add to dashboard Cite

The discovery of quasars a few hundred megayears after the Big Bang represents a major challenge to our understanding of black holes as well as galaxy formation and evolution. Quasarsʼ luminosity is produced by extreme gas accretion onto black holes, which have already reached masses of M BH >10 9 M e by z∼6. Simultaneously, their host galaxies form hundreds of stars per year, using up gas in the process. To understand which environments are able to sustain the rapid formation of these extreme sources, we started a Very Large Telescope/Multi-Unit Spectroscopic Explorer (MUSE) effort aimed at characterizing the surroundings of a sample of 5.7<z<6.6 quasars, which we have dubbed the Reionization Epoch QUasar InvEstigation with MUSE (REQUIEM) survey. We here present results of our searches for extended Lyα halos around the first 31 targets observed as part of this program. Reaching 5σ surface brightness limits of 0.1-1.1×10 −17 erg s −1 cm −2 arcsec −2 over a 1 arcsec 2 aperture, we were able to unveil the presence of 12 Lyα nebulae, eight of which are newly discovered. The detected nebulae show a variety of emission properties and morphologies with luminosities ranging from 8×10 42 to 2×10 44 erg s −1 , FWHMs between 300 and 1700 km s −1 , sizes <30 pkpc, and redshifts consistent with those of the quasar host galaxies. As the first statistical and homogeneous investigation of the circumgalactic medium of massive galaxies at the end of the reionization epoch, the REQUIEM survey enables the study of the evolution of the cool gas surrounding quasars in the first 3 Gyr of the universe. A comparison with the extended Lyα emission observed around bright (M 1450 −25 mag) quasars at intermediate redshift indicates little variations on the properties of the cool gas from z∼6 to z∼3, followed by a decline in the average surface brightness down to z∼2.

show abstract

Section: Discussionmentioning

confidence: 99%

“…The total time on targets was 660 s, divided in 263 individual 2.51 s exposures. The data reduction has been performed with standard IRAF routines following the procedure described in Farina et al (2018) and Georgiev et al (2019). We registered Figure 15.…”

Section: Appendix a Atlas Of The Quasars Part Of The Requiem Surveymentioning

confidence: 99%

The REQUIEM Survey. I. A Search for Extended Lyα Nebular Emission Around 31 z > 5.7 Quasars

Farina

Battaia

Costa

et al. 2019

ApJ

Self Cite

103

143

View full text Add to dashboard Cite

show abstract

“…The two most invoked scenarios to form NSCs are the infall of a star cluster towards the galaxy center, due to dynamical friction, and the inflow of gas to the nuclear region, triggering star formation in situ. Recent works by Kacharov et al (2018) and Georgiev et al (2019) have shown that different scenarios could have played a major role in different galaxies, but also that both of them could have provided different contributions to the same NSC. Lyubenova et al (submitted) supported cluster merging in a study including also FCC 177 and FCC 170.…”

Section: Nscs In the Fornax Clustermentioning

confidence: 99%

The Fornax 3D project: Thick disks in a cluster environment

Pinna

Falcón-Barroso

Martig

et al. 2019

A&A

View full text Add to dashboard Cite

We used deep MUSE observations to perform a stellar-kinematic and population analysis of FCC 153 and FCC 177, two edge-on S0 galaxies in the Fornax cluster. The geometrical definition of the different structural components of these two galaxies allows us to describe the nature of their thick disks. These are both old, relatively metal poor and [Mg/Fe]-enhanced, and their star formation history (SFH) reveals a minor younger component whose chemical properties suggest its later accretion. Moreover, the outer regions of these geometrically defined thick disks show higher values of metallicity and lower values of [Mg/Fe]. These stars probably formed in the thin-disk region and they were dynamically heated to form the flares present in these two galaxies. We propose different formation scenarios for the three populations of these thick disks: in-situ formation, accretion and disk heating. A clear distinction in age is found between the metal poor and [Mg/Fe]-enhanced thick disks (old, ∼ 12 − 13 Gyr), and the metal rich and less [Mg/Fe]-enhanced thin disks (young, ∼ 4 − 5 Gyr). These two galaxies show signs of relatively recent star formation in their thin disks and nuclear regions. While the thin disks show more continuous SFHs, the nuclei display a rather bursty SFH. These two galaxies are located outside of the densest region of the Fornax cluster where FCC 170 resides. This other edge-on S0 galaxy was studied by Pinna et al. (2019). We compare and discuss our results with this previous study. The differences between these three galaxies, at different distances from the cluster center, suggest that the environment can have a strong effect on the galaxy evolutionary path.

show abstract

“…The data reduction process for producing the science image follows the steps described by Georgiev et al (2019) in their ARGOS commissioning paper. After a basic reduction, correcting for nonlinearity and persistence effects, bad pixel masking, and flat-fielding, sky frames were created from exposures spaced about 10 min apart in order to negate effects by the rapidly varying near-infrared atmosphere.…”

Section: Image Processingmentioning

confidence: 99%

Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy

Hamilton

Berton

Antón

et al. 2021

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

The γ-ray emitting galaxy SBS 0846 + 513 has been classified as a Narrow-Line Seyfert 1 (NLS1) from its spectroscopy, and on that basis would be thought likely to have a small central black hole hosted in a spiral galaxy. But very few of the γ-ray NLS1 have high-resolution imaging of their hosts, so it is unknown how the morphology expectation holds up for the γ-emitting class. We have observed this galaxy in the J-band with the Large Binocular Telescope’s LUCI1 camera and the ARGOS adaptive optics system. We estimate its black hole mass to lie between $4.2\times 10^7 \le \frac{\text{M}}{\text{M}_\odot } \le 9.7\times 10^7$, using the correlation with bulge luminosity, or $1.9\times 10^7 \le \frac{\text{M}}{\text{M}_\odot } \le 2.4\times 10^7$ using the correlation with Sérsic index. Our favoured estimate is 4.2 × 107M⊙, putting its mass at the high end of the NLS1 range in general but consistent with others that are γ-ray emitters. These estimates are independent of the Broad Line Region viewing geometry and avoid any underestimates due to looking down the jet axis. Its host shows evidence of a bulge + disc structure, from the isophote shape and residual structure in the nuclear-subtracted image. This supports the idea that γ-ray NLS1 may be spiral galaxies, like their non-jetted counterparts.

show abstract

The Milky Way like galaxy NGC 6384 and its nuclear star cluster at high NIR spatial resolution using LBT/ARGOS commissioning data

Cited by 12 publications

References 97 publications

The REQUIEM Survey. I. A Search for Extended Lyα Nebular Emission Around 31 z > 5.7 Quasars

The REQUIEM Survey. I. A Search for Extended Lyα Nebular Emission Around 31 z > 5.7 Quasars

The Fornax 3D project: Thick disks in a cluster environment

Observations of the γ-ray-emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy

Contact Info

Product

Resources

About