A5050260900- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Radio Astronomy Observations and Technology
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Medical Imaging Techniques and Applications
- Spectroscopy and Laser Applications
- Glaucoma and retinal disorders
- Radiation Therapy and Dosimetry
- Receptor Mechanisms and Signaling
- Complex Network Analysis Techniques
- Laser Design and Applications
- Radiation Effects in Electronics
- Diamond and Carbon-based Materials Research
- Electromagnetic Fields and Biological Effects
- Retinal Imaging and Analysis
- Gamma-ray bursts and supernovae
- Network Traffic and Congestion Control
- Advanced Optical Network Technologies
- Advanced X-ray and CT Imaging
Leibniz Institute for Astrophysics Potsdam
2023-2024
University of Antofagasta
2019-2024
Universidade Federal de Santa Catarina
2017-2019
Universidade Federal do Rio Grande do Sul
2009-2017
Centro de Astrobiología
2016
Universidade Estadual de Maringá
2015
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for William Herschel Telescope, will see first light in late 2022. WEAVE comprises a 2-degree field-of-view prime-focus corrector system, nearly 1000-multiplex fibre positioner, 20 individually deployable 'mini' integral field units (IFUs), and single large IFU. These systems feed dual-beam spectrograph covering wavelength range 366$-$959\,nm at $R\sim5000$, or two shorter ranges $R\sim20\,000$. After summarising...
We use spatially resolved spectroscopy from the Calar Alto Legacy Integral Field Area (CALIFA) survey to study nature of line emitting gas in galaxies different Hubble types, focusing on separation star-forming (SF) regions those better characterized as diffuse ionized (DIG). The diagnosis is carried out terms equivalent width H α (WH α). Three nebular regimes are identified. Regions where WH < 3 Å define what we call hDIG, component DIG photoionization dominated by hot, low-mass, evolved...
We present optical integral field spectroscopy of the circum-nuclear gas Seyfert 2 galaxy NGC 1386. The data cover central 7'' × 9'' (530 680 pc) at a spatial resolution 0 9 (68 pc), and spectral range 5700–7000 Å 66 km s−1. line emission is dominated by bright component, with two lobes extending ≈3'' north south nucleus. identify three main kinematic components. first has low velocity dispersion ( 90 s−1), extends over whole view, consistent rotating in disk. interpret as resulting from...
We investigate the impact of diffuse ionized gas (DIG) on abundance determinations in star-forming (SF) galaxies. The DIG is characterised using H$\alpha$ equivalent width ($W_{\text{H}\alpha}$). From a set 1,409 SF galaxies from Mapping Nearby Galaxies at APO (MaNGA) survey, we calculate fractional contribution to several emission lines high-$S/N$ data spaxels (instead noisy emission-lines DIG-dominated spaxels). Our method applicable spectra with observed $W_{\text{H}\alpha} \gtrsim 10$...
We present two-dimensional gaseous kinematics of the inner 1.1 x 1.6kpc^2 Seyfert 2 galaxy NGC2110, from optical spectra obtained with GMOS integral field spectrograph on Gemini South telescope at a spatial resolution 100pc. Gas emission is observed over whole field-of-view, complex - and frequently double emission-line profiles. have identified four components in emitting gas, according to their velocity dispersion (sigma), which we refer as: (1) warm gas disk (sigma = 100-220km/s); (2)...
ABSTRACT The effect of active galactic nuclei (AGNs) feedback on the host galaxy, and its role in quenching or enhancing star formation, is still uncertain due to fact that usual formation rate (SFR) indicators – emission-line luminosities based assumption photoionization by young stars cannot be used for galaxies as ionizing source AGN. We thus investigate use SFR derived from stellar population relation with gas a sample 170 AGN hosts matched control 291 galaxies. compare values densities...
We present a two-dimensional analysis of the gaseous excitation and kinematics inner 2.5 × 1.7 kpc2 low-ionization nuclear emission-line region (LINER)/Seyfert 1 galaxy Arp 102B, from optical spectra obtained with Gemini Multi-Object Spectrograph Integral Field Unit on North telescope at spatial resolution ≈250 pc. Emission-line flux maps show same two-armed spiral we have discovered in previous observations Hubble Space Telescope Advanced Camera for Surveys. One arm reaches kpc to east...
We present optical integral field spectroscopy $-$ obtained with the Gemini Multi-Object Spectrograph of inner $4.0 \times 5.8$ kpc$^2$ narrow line radio galaxy 3C 33 at a spatial resolution 0.58 kpc. The gas emission shows three brightest structures: strong knot nuclear and two other knots $\approx 1.4$ kpc south-west north-east nucleus along ionization axis. detect kinematic components in lines profiles, "broader component" (with velocity dispersion $\sigma > 150$ km s$^{-1}$) being...
The air transportation network in a country has great impact on the local, national and global economy. In this paper, we analyze Brazil with complex features to better understand its characteristics. our analysis, built networks composed either by or international flights. We also consider when both types of flights are put together. Interesting conclusions emerge from analysis. For instance, Viracopos Airport (Campinas City) is most central connected airport network. Any operational...
We observed the nuclear region of galaxy NGC 1365 with integral field unit Gemini Multi Object Spectrograph mounted on GEMINI-South telescope. The view covers 13 × 6 arcsec2(1173 541 pc2) centred nucleus, at a spatial resolution 52 pc. spectral coverage extends from 5600 to 7000 Å, R = 1918. hosts Seyfert 1.8 and exhibits prominent bar extending out 100 arcsec (9 kpc) nucleus. lies within inner Lindblad resonance. Within this region, we found that kinematics ionized gas (as traced by [O i],...
Radio activity in AGN (Active Galactic Nuclei) produce feedback on the host galaxy via impact of relativistic jets circumnuclear gas. Although radio can reach up to several times optical radius galaxy, this review we focus observation deposited locally central region galaxies, form outflows due jet-gas interaction. We begin by discussing how mergers and interactions are most favored scenario for triggering after gas accretion nuclear supermassive black hole star formation enhancement region,...
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for William Herschel Telescope, will see first light in late 2022. WEAVE comprises a 2-degree field-of-view prime-focus corrector system, nearly 1000-multiplex fibre positioner, 20 individually deployable 'mini' integral field units (IFUs), and single large IFU. These systems feed dual-beam spectrograph covering wavelength range 366$-$959\,nm at $R\sim5000$, or two shorter ranges $R\sim20\,000$. After summarising...
ABSTRACT We present the results of analysis 18 optical spectra covering H α profile region active nucleus galaxy Pictor A obtained in different epochs along 12 yr. With these data, we model variability double-peaked emission this galaxy. find small variations integrated flux broad component α, occurring on short time-scales, order 40 d. In addition, significant relative intensities red and blue sides occur time-scales years. to explain observations, propose a scenario which double-peak is...
ABSTRACT We investigate the ionized gas excitation and kinematics in inner $4.3\, \times \, 6.2$ kpc2 of merger radio galaxy 4C+29.30. Using optical integral field spectroscopy with Gemini North Telescope, we present flux distributions, line-ratio maps, peak velocities velocity dispersion maps as well channel a spatial resolution $\approx\! 955\,$ pc. observe high blueshifts up to $\sim\! -650\,$$\rm km\, s^{-1}$ region ∼1 arcsec south nucleus (the southern knot – SK), which also presents...
Galaxy mergers are central to our understanding of galaxy formation, especially within the context hierarchical models. Besides having a large impact on star formation history, also able influence gas motions at centre galaxies and trigger an Active Galactic Nucleus (AGN). In this paper, we present case study Seyfert NGC 2992, which together with 2993 forms early-stage merger system Arp 245. Using Gemini Multi-Object Spectrograph (GMOS) integral field unit (IFU) data from inner 1.1 kpc were...
We present optical integral field spectroscopy of the inner $2.5 \times 3.4$ kpc$^2$ broad-line radio galaxy Pictor A, at a spatial resolution $\approx 400$ pc. Line emission is observed over whole field-of-view, being strongest nucleus and in an elongated linear feature (ELF) crossing from south-west to north-east along PA $\sim 70^\circ$. Although broad double-peaked H$\alpha$ line [OI]6300/H$\alpha$ [SII]6717+31/H$\alpha$ ratios are typical AGNs, [NII]6584/H$\alpha$ ratio (0.15 - 0.25)...
We present a detailed study of the large-scale shock front in Stephan's Quintet, byproduct past and ongoing interactions. Using integral-field spectroscopy from new William Herschel Telescope Enhanced Area Velocity Explorer (WEAVE), recent 144 MHz observations LOFAR Two-metre Sky Survey (LoTSS), archival data Very Large Array James Webb Space (JWST), we obtain measurements key properties determine its impact on system. Harnessing WEAVE large integral field unit's (LIFU) view (90 $\times$ 78...
We characterize the ionized gas outflows in 15 low-redshift star-forming galaxies, a Valparaíso ALMA/APEX Line Emission Survey (VALES) subsample, using MUSE integral field spectroscopy and GAMA photometric broadband data. measure emission-line spectra by fitting double-component profile, with second broader component related to outflowing gas. This interpretation is agreement correlation between observed star-formation rate (SFR) surface density (Σ SFR ) second-component velocity dispersion...
We present deep SINFONI K-band integral field spectra of two submillimeter galaxy systems (SMG): BR 1202-0725 and J1000+0234, at z = 4.69 4.55, respectively. Spectra extracted for each object in the do not show any signature [O ii]λλ3726, 29 Å emission-lines, placing upper flux limits 3.9 2.5 × 10-18erg s-1 cm-2for Using relation between star formation rate (SFR) luminosity ii] doublet, we estimate unobscured SFR ~ 10−15 M⊙ yr-1and ~30−40 yr-1for objects systems, For SMGs, these values are...
The goal of this work is to map the gas excitation and kinematics in inner ~ 2 kiloparsecs radio-galaxy Arp 102B. Though being classified as an E0 galaxy, 102B shows a nuclear spiral (Fathi et al ., preparation). Previous studies spirals have led conclusion that these structures usually trace inflows . 2006; [Storchi-Bergmann 2007; [Riffel 2008). We used integral field spectroscopy obtained with GMOS instrument Gemini North telescope investigate nature arms. spectra cover wavelength range...