A5062773650- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Spectroscopy and Laser Applications
- Scientific Research and Discoveries
- Calibration and Measurement Techniques
- CCD and CMOS Imaging Sensors
- Cosmology and Gravitation Theories
- Impact of Light on Environment and Health
- Scientific Measurement and Uncertainty Evaluation
- Muscle Physiology and Disorders
- Spectroscopy and Chemometric Analyses
- History and Developments in Astronomy
- Radio Astronomy Observations and Technology
- Solid-state spectroscopy and crystallography
- Non-Destructive Testing Techniques
- Magnetic Properties and Applications
- Particle physics theoretical and experimental studies
- Muscle activation and electromyography studies
University of Valparaíso
2015-2021
National Astronomical Observatories
2017-2021
Chinese Academy of Science South America Center for Astronomy
2017-2021
University of Science and Technology of China
2017-2021
Chinese Academy of Sciences
2017-2021
Ghent University
2014-2016
Kavli Institute for Theoretical Sciences
2011-2014
Peking University
2011-2014
Cardiff University
2009-2011
Netherlands Institute for Radio Astronomy
2009
This paper analyses the behaviour of gas-to-dust mass ratio (G/D) local Universe galaxies over a large metallicity range. We combine three samples: Dwarf Galaxy Survey, KINGFISH survey and subsample from Galametz et al. (2011) totalling 126 galaxies, covering 2 dex range, with 30% sample 12+log(O/H) < 8.0. The dust masses are homogeneously determined semi-empirical model, including submm constraints. atomic molecular gas compiled literature. Two XCO used to estimate masses: Galactic XCO,...
Context. The far-infrared (FIR) lines are important tracers of the cooling and physical conditions interstellar medium (ISM) rapidly becoming workhorse diagnostics for galaxies throughout universe. There clear indications a different behavior these at low metallicity that needs to be explored.
We present ALMA Band 9 observations of the [C II]158um emission for a sample 10 main-sequence galaxies at redshift z ~ 2, with typical stellar masses (log M*/Msun 10.0 - 10.9) and star formation rates (~ 35 115 Msun/yr). Given strong well understood evolution interstellar medium from to = we investigate behaviour II] empirically identify its primary driver. detect six (four secure, two tentative) estimate ensemble averages including non detections. The II]-to-infrared luminosity ratio (L[C...
We combine new Herschel/SPIRE sub-millimeter observations with existing multiwavelength data to investigate the dust scaling relations of Herschel Reference Survey, a magnitude-, volume-limited sample ~300 nearby galaxies in different environments. show that dust-to-stellar mass ratio anti-correlates stellar mass, surface density and NUV-r colour across whole range parameters covered by our sample. Moreover, decreases significantly when moving from late- early-type galaxies. These are...
We gather infrared (IR) photometric data from 8 to 500 microns (Spitzer, WISE, IRAS and Herschel) for all of the HRS galaxies. Draine & Li (2007) models are fit which stellar contribution has been carefully removed. find that our coverage is sufficient constrain parameters a strong constraint on 20-60 range mandatory estimate relative photo-dissociation regions IR SED. The SED tend systematically under-estimate observed flux densities, especially low mass systems. provide output galaxies:...
We use Hα and far-ultraviolet (FUV, 1539 Å) Galaxy Evolution Explorer (GALEX) data for a large sample of nearby objects to study the high-mass (m⩾ 2 M☉) star formation activity normal late-type galaxies. The are corrected dust attenuation using most accurate techniques available at present, namely Balmer decrement total far-infrared FUV flux ratio GALEX data. shows highly dispersed distribution in (log f(Hα)/f(FUV) = 1.10 ± 0.34 indicating that two commonly used tracers give rates (SFRs)...
We describe the Herschel Virgo Cluster Survey (HeViCS) and first data obtained as part of Science Demonstration Phase (SDP). The cover a central 4x4 sq deg region cluster. use SPIRE PACS photometry to produce 100, 160, 250, 350 500 micron luminosity functions (LFs) for optically bright galaxies that are selected at detected in all bands. compare these LFs with those previously derived using IRAS, BLAST Herschel-ATLAS data. do not have large numbers faint or examples very luminous seen...
We investigate the relationship between stellar mass, metallicity and gas content for a magnitude- volume-limited sample of 260 nearby late-type galaxies in different environments, from isolated to Virgo cluster members. derive oxygen abundance estimates using new integrated, drift-scan optical spectroscopy base calibrations Kewley & Ellison (2008). Combining these measurements with ultraviolet near-infrared photometry HI 21 cm line observations, we examine relations metallicity, mass...
The GALEX Ultraviolet Virgo Cluster Survey (GUViCS) is a complete blind survey of the cluster covering about 40 sq. deg. in far UV (FUV, lambda_eff=1539A, Delta-lambda=442A) and 120 near (NUV, lambda_eff=2316A, Delta-lambda=1060A). goal to study ultraviolet (UV) properties galaxies rich environment, spanning wide luminosity range from giants dwarfs, regardless prior knowledge their star formation activity. data will be combined with those other bands (optical: NGVS; far-infrared - submm:...
We present new Hα+[NII] imaging data of late-type galaxies in the Herschel Reference Survey aimed at studying star formation properties a K-band-selected, volume-limited sample nearby galaxies. The are corrected for [NII] contamination and dust attenuation using different recipes based on Balmer decrement 24 μm luminosities. show that Hα luminosities derived with corrections give consistent results only whenever uncertainty estimate is σ [C(Hβ)] ≤ 0.1. used these to derive rate compare...
By combining <i>Herschel<i/>-SPIRE observations obtained as part of the <i>Herschel<i/> Virgo Cluster Survey with 21 cm Hi data from literature, we investigate role cluster environment on dust content spiral galaxies. We show for first time that extent disk is significantly reduced in Hi-deficient galaxies, following remarkably well observed "truncation" disk. The ratio submillimetre-to-optical diameter correlates Hi-deficiency, suggesting able to strip gas. These results provide important...
We investigate the amount and spatial distribution of interstellar dust in edge-on spiral galaxies, using detailed radiative transfer modeling a homogeneous sample 12 galaxies selected from CALIFA survey. Our automated fitting routine, FitSKIRT, was first validated against artificial data. This is done by simultaneously reproducing SDSS $g$-, $r$-, $i$- $z$-band observations toy model order to combine information present different bands. show that this combined, oligochromatic fitting, has...
Context. Dust reprocesses about half of the stellar radiation in galaxies. The thermal re-emission by dust absorbed energy is considered to be driven merely young stars so often applied tracing star formation rate Recent studies have argued that old population might responsible for a non-negligible fraction radiative heating.
We examined variations in the 160/250 and 250/350 μm surface brightness ratios within 24 nearby (<30 Mpc) face-on spiral galaxies observed with Herschel Space Observatory to identify heating mechanisms for dust emitting at these wavelengths. The analysis consisted of both qualitative quantitative comparisons Hα emission, which trace light from star-forming regions, 3.6 traces older stellar populations galaxies. find broad dust. In one subset galaxies, we found evidence that emission ≤160...
(Abridged) We investigate the properties of galaxies between blue and red sequence (i.e., transition region) by combining UV NIR imaging to HI line observations for a volume-limited sample nearby galaxies. confirm existence tight relation colour HI-fraction across all range colours, although outside cloud this trend becomes gradually weaker. Transition are divided into two different families, according their atomic hydrogen content. HI-deficient majority in our sample. They found high...
We study the far infrared (60-500 $\mu$m) colours of late-type galaxies in $Herschel$ Reference Survey, a K-band selected, volume limited sample nearby galaxies. The are correlated with each other, tighter correlations for indices that closer wavelength. also compare different colour to various tracers physical properties target galaxies, such as surface brightness ionising and non-ionising stellar radiation, dust attenuation metallicity. emission cold dominating spectral domain regulated by...
Using Herschel data from the Open Time Key Project Virgo Cluster Survey (HeViCS), we investigated relationship between metallicity gradients expressed by metal abundances in gas phase as traced chemical composition of HII regions, and solid phase, dust-to-gas mass ratio. We derived radial gradient ratio for all galaxies observed HeViCS whose are available literature. They late type Sbc galaxies, namely NGC4254, NGC4303, NGC4321, NGC4501. examined different dependencies on CO-to-H$_2$...
Physical inactivity and disuse are major contributors to age-related muscle loss.Denervation of skeletal has been previously used as a model with which investigate atrophy following disuse.Although gene regulatory networks that control after denervation have established, the transcriptome in response recovery associated epigenetic mechanisms may function modulate expression during or yet be investigated.We report silencing tibialis anterior rats tetrodotoxin (TTX)-administered common...