First Results from SMAUG: Characterization of Multiphase Galactic Outflows from a Suite of Local Star-forming Galactic Disk Simulations

Abstract We present the new TNG50 cosmological, magnetohydrodynamical simulation – the third and final volume of the IllustrisTNG project. This simulation occupies a unique combination of large volume and high resolution, with a 50 Mpc box sampled by 21603 gas cells (baryon mass of 8 × 104 M⊙). The median spatial resolution of star-forming interstellar medium gas is ∼100−140 pc. This resolution approaches or exceeds that of modern ‘zoom’ simulations of individual massive galaxies, while the volume contains ∼20 000 resolved galaxies with $M_\star \gtrsim 10^7$ M⊙. Herein we show first results from TNG50, focusing on galactic outflows driven by supernovae as well as supermassive black hole feedback. We find that the outflow mass loading is a non-monotonic function of galaxy stellar mass, turning over and rising rapidly above 1010.5 M⊙ due to the action of the central black hole (BH). The outflow velocity increases with stellar mass, and at fixed mass it is faster at higher redshift. The TNG model can produce high-velocity, multiphase outflows that include cool, dense components. These outflows reach speeds in excess of 3000 km s−1 out to 20 kpc with an ejective, BH-driven origin. Critically, we show how the relative simplicity of model inputs (and scalings) at the injection scale produces complex behaviour at galactic and halo scales. For example, despite isotropic wind launching, outflows exhibit natural collimation and an emergent bipolarity. Furthermore, galaxies above the star-forming main sequence drive faster outflows, although this correlation inverts at high mass with the onset of quenching, whereby low-luminosity, slowly accreting, massive BHs drive the strongest outflows.

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A hundred new eclipsing binary system candidates studied in a near-infrared window in the VVV survey

Publications of the Astronomical Society of Australia ◽

10.1017/pasa.2020.44 ◽

2020 ◽

Vol 37 ◽

Author(s):

L. V. Gramajo ◽

T. Palma ◽

D. Minniti ◽

R. K. Saito ◽

J. J. Clariá ◽

...

Keyword(s):

Near Infrared ◽

Galactic Disk ◽

Extensive Study ◽

Eclipsing Binaries ◽

Physical Parameters ◽

Eclipsing Binary ◽

Mean Values ◽

Median Period ◽

First Results ◽

Contact Binaries

Abstract We present the first results obtained from an extensive study of eclipsing binary (EB) system candidates recently detected in the VISTA Variables in the Vía Láctea (VVV) near-infrared (NIR) Survey. We analyse the VVV tile d040 in the southern part of the Galactic disc wherein the interstellar reddening is comparatively low, which makes it possible to detect hundreds of new EB candidates. We present here the light curves and the determination of the geometric and physical parameters of the best candidates found in this ‘NIR window’, including 37 contact, 50 detached, and 13 semi-detached EB systems. We infer that the studied systems have an average of the $K_s$ amplitudes of $0.8$ mag and a median period of 1.22 days where, in general, contact binaries have shorter periods. Using the ‘Physics Of Eclipsing Binaries’ (PHOEBE) interactive interface, which is based on the Wilson and Devinney code, we find that the studied systems have low eccentricities. The studied EBs present mean values of about 5 700 and 4 900 K for the $T_1$ and $T_2$ components, respectively. The mean mass ratio (q) for the contact EB stars is $\sim$ 0.44. This new galactic disk sample is a first look at the massive study of NIR EB systems.

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Characterization of High-Power Turbomachinery Tilting Pad Journal Bearings: First Results Obtained on a Novel Test Bench

Lubricants ◽

10.3390/lubricants6010004 ◽

2018 ◽

Vol 6 (1) ◽

pp. 4 ◽

Cited By ~ 4

Author(s):

Enrico Ciulli ◽

Paola Forte ◽

Mirko Libraschi ◽

Lorenzo Naldi ◽

Matteo Nuti

Keyword(s):

High Power ◽

Test Bench ◽

Journal Bearings ◽

Tilting Pad ◽

First Results ◽

Tilting Pad Journal Bearings

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First results from observations of southern star forming regions with the swedish ESO submillimetre telescope

The Physics and Chemistry of Interstellar Molecular Clouds: mm and Sub-mm Observations in Astrophysics - Lecture Notes in Physics ◽

10.1007/bfb0119462 ◽

2008 ◽

pp. 120-123

Author(s):

M. Olberg ◽

B. Reipurth ◽

R. S. Booth

Keyword(s):

Star Forming ◽

Star Forming Regions ◽

First Results

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Analysis methods of CT-scan images for the characterization of the bone texture: First results

Pattern Recognition Letters ◽

10.1016/s0167-8655(03)00036-9 ◽

2003 ◽

Vol 24 (12) ◽

pp. 1971-1982 ◽

Cited By ~ 12

Author(s):

A. Taleb-Ahmed ◽

P. Dubois ◽

E. Duquenoy

Keyword(s):

Ct Scan ◽

Analysis Methods ◽

First Results

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The Case Study of the Medieval Town Walls of Gubbio in Italy: First Results on the Characterization of Mortars and Binders

Heritage ◽

10.3390/heritage1020031 ◽

2018 ◽

Vol 1 (2) ◽

pp. 468-478 ◽

Cited By ~ 2

Author(s):

Fernanda Carvalho ◽

Andreia Lopes ◽

Antonella Curulli ◽

Teresa da Silva ◽

Maria Lima ◽

...

Keyword(s):

Polarized Light ◽

Ex Situ ◽

X Ray Diffraction ◽

X Ray ◽

Heritage Sites ◽

First Results ◽

Restoration Practices ◽

Climate Events

Good conservation and restoration practices of cultural heritage assets rely on the knowledge of original materials. In the framework of the HERACLES Project (HERACLES—HEritage Resilience Against CLimate Events on Site, H2020 Grant Agreement 700395), dealing with the effects of climatic actions and natural hazards on built heritage, a set of important heritage sites are currently under study to improve their resilience against climate events. Among these are the medieval Gubbio Town Walls in Italy. The present work focuses on the mortars and binders of this monument and collected samples related to different parts of the Walls, corresponding to various historical periods of construction and interventions. They were characterized to determine their minerochemical composition, thermal behavior, and morphology. For that purpose, ex-situ laboratory techniques, such as X-ray diffraction (XRD), wavelength dispersive X-ray fluorescence (WDXRF), optical microscopy (OM), polarized light microscopy (PLM), scanning electron microscopy (SEM), and simultaneous differential thermal analysis and thermogravimetry (TG-DTA) were used to discern trends in different sampling areas due to construction/reconstruction periods and building techniques.

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Measurements on pointing error and field of view of Cimel-318 Sun photometers in the scope of AERONET-Europe

Atmospheric Measurement Techniques Discussions ◽

10.5194/amtd-6-3013-2013 ◽

2013 ◽

Vol 6 (2) ◽

pp. 3013-3057

Author(s):

B. Torres ◽

C. Toledano ◽

A. Berjón ◽

D. Fuertes ◽

V. Molina ◽

...

Keyword(s):

Calibration Method ◽

Field Of View ◽

Pointing Error ◽

Vicarious Calibration ◽

Movement Correction ◽

Measurement Protocol ◽

The Matrix ◽

First Results ◽

Sensitivity Studies

Abstract. Sensitivity studies indicate that among the different error sources of ground-based sky radiometer observations, the pointing error has an important role in the correct retrieving of aerosol properties, being specially critical for the characterization of desert dust aerosol. The present work analyzes the first results of two new measurements, cross and matrix, specifically designed for an evaluation of the pointing error in the standard instrument of the Aerosol Robotic Network, the Cimel CE-318 sun-photometer. The first part of the analysis contains a preliminary study whose results conclude on the need of a sun movement correction for the correct evaluation of the pointing error from both new measurements. Once this correction is applied, both measurements show an equivalent behavior with differences under 0.01° in the evaluation of the pointing error. The second part of the analysis includes the incorporation of the cross scenario in the AERONET routine measurement protocol in order to monitor the pointing error in field instruments. Using the data collected for more than a year, the pointing error is evaluated on 7 sun-photometers belonging to AERONET-Europe. The pointing error values registered are generally smaller than 0.01° though in some instruments values up to 0.03° have been observed. Moreover, the pointing error evaluation has shown that this measure can be used to detect mechanical problems in the robots or dirtiness in the quadrant detector due to the stable behavior of the values against time and solar zenith angle. At the same time, the matrix scenario can be used to derive the value of the field of view. The methodology implemented and the characterization of five sun-photometers is presented in the last part of the study. To validate the method, a comparison with field of view values obtained from the vicarious calibration method was developed. The differences between both techniques are under 3%.

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Studies of Star-Forming Galaxies at High-Z. II: The First Results of Cosmos K Band Survey

Highlights of Spanish Astrophysics II ◽

10.1007/978-94-017-1776-2_91 ◽

2001 ◽

pp. 367-367

Author(s):

D. Cristóbal ◽

M. Prieto ◽

R. Guzmán ◽

M. Balcells ◽

J. Acosta ◽

...

Keyword(s):

Star Forming ◽

First Results ◽

Band Survey ◽

K Band

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Two new free-floating or wide-orbit planets from microlensing

Astronomy and Astrophysics ◽

10.1051/0004-6361/201834557 ◽

2019 ◽

Vol 622 ◽

pp. A201 ◽

Cited By ~ 18

Author(s):

Przemek Mróz ◽

Andrzej Udalski ◽

David P. Bennett ◽

Yoon-Hyun Ryu ◽

Takahiro Sumi ◽

...

Keyword(s):

Gravitational Lensing ◽

Milky Way ◽

Planet Formation ◽

Physical Mechanism ◽

Galactic Disk ◽

Galactic Bulge ◽

Brown Dwarf ◽

Low Mass ◽

Rule Out

Planet formation theories predict the existence of free-floating planets that have been ejected from their parent systems. Although they emit little or no light, they can be detected during gravitational microlensing events. Microlensing events caused by rogue planets are characterized by very short timescales tE (typically below two days) and small angular Einstein radii θE (up to several μas). Here we present the discovery and characterization of two ultra-short microlensing events identified in data from the Optical Gravitational Lensing Experiment (OGLE) survey, which may have been caused by free-floating or wide-orbit planets. OGLE-2012-BLG-1323 is one of the shortest events discovered thus far (tE = 0.155 ± 0.005 d, θE = 2.37 ± 0.10μas) and was caused by an Earth-mass object in the Galactic disk or a Neptune-mass planet in the Galactic bulge. OGLE-2017-BLG-0560 (tE = 0.905 ± 0.005 d, θE = 38.7 ± 1.6μas) was caused by a Jupiter-mass planet in the Galactic disk or a brown dwarf in the bulge. We rule out stellar companions up to a distance of 6.0 and 3.9 au, respectively. We suggest that the lensing objects, whether located on very wide orbits or free-floating, may originate from the same physical mechanism. Although the sample of ultrashort microlensing events is small, these detections are consistent with low-mass wide-orbit or unbound planets being more common than stars in the Milky Way.

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Probing the Redshift Desert Using the Gemini Deep Deep Survey: Observing Galaxy Mass Assembly at z > 1

Symposium - International Astronomical Union ◽

10.1017/s0074180900196822 ◽

2005 ◽

Vol 216 ◽

pp. 390-397

Author(s):

Karl Glazebrook ◽

Keyword(s):

Spectroscopic Studies ◽

Star Forming ◽

Hubble Sequence ◽

First Results ◽

Deep Survey ◽

Redshift Survey ◽

Mass Assembly ◽

Galaxy Assembly ◽

First Time ◽

The Universe

The aim of the Gemini Deep Deep Survey is to push spectroscopic studies of complete galaxy samples (both red and blue objects) significantly beyond z = 1; this is the redshift where the current Hubble sequence of ellipticals and spirals is already extant. In the Universe at z = 2 the only currently spectroscopically confirmed galaxies are blue, star-forming and of fragmented morphology. Exploring this transition means filling the ‘redshift desert’ 1 < z < 2 where there is a dearth of spectroscopic measurements. To do this we need to secure redshifts of the oldest, reddest galaxies (candidate ellipticals) beyond z > 1 which has led us to carry out the longest exposure redshift survey ever done: 100 ksec spectroscopic MOS exposures with GMOS on Gemini North. We have developed an implementation of the CCD “nod & shuffle” technique to ensure precise sky-subtraction in these ultra-deep exposures. At the halfway mark the GDDS now has ∼ 36 galaxies in the redshift desert 1.2 < z < 2 extending up to z = 1.97 and I < 24.5 with secure redshifts based on weak rest-frame UV absorption features complete for both red, old objects and young, blue objects. The peak epoch of galaxy assembly is now being probed by direct spectroscopic investigation for the first time. on behalf of the GDDS team I present our first results on the properties of galaxies in the ‘redshift desert’.

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