33 research outputs found
Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds
The search of life in the Universe is a fundamental problem of astrobiology
and a major priority for NASA. A key area of major progress since the NASA
Astrobiology Strategy 2015 (NAS15) has been a shift from the exoplanet
discovery phase to a phase of characterization and modeling of the physics and
chemistry of exoplanetary atmospheres, and the development of observational
strategies for the search for life in the Universe by combining expertise from
four NASA science disciplines including heliophysics, astrophysics, planetary
science and Earth science. The NASA Nexus for Exoplanetary System Science
(NExSS) has provided an efficient environment for such interdisciplinary
studies. Solar flares, coronal mass ejections and solar energetic particles
produce disturbances in interplanetary space collectively referred to as space
weather, which interacts with the Earth upper atmosphere and causes dramatic
impact on space and ground-based technological systems. Exoplanets within close
in habitable zones around M dwarfs and other active stars are exposed to
extreme ionizing radiation fluxes, thus making exoplanetary space weather (ESW)
effects a crucial factor of habitability. In this paper, we describe the recent
developments and provide recommendations in this interdisciplinary effort with
the focus on the impacts of ESW on habitability, and the prospects for future
progress in searching for signs of life in the Universe as the outcome of the
NExSS workshop held in Nov 29 - Dec 2, 2016, New Orleans, LA. This is one of
five Life Beyond the Solar System white papers submitted by NExSS to the
National Academy of Sciences in support of the Astrobiology Science Strategy
for the Search for Life in the Universe.Comment: 5 pages, the white paper was submitted to the National Academy of
Sciences in support of the Astrobiology Science Strategy for the Search for
Life in the Univers
Water vapor detection in the transmission spectra of HD 209458 b with the CARMENES NIR channel
Aims: We aim at detecting HO in the atmosphere of the hot Jupiter HD
209458 b and perform a multi-band study in the near infrared with CARMENES.
Methods: The HO absorption lines from the planet's atmosphere are
Doppler-shifted due to the large change in its radial velocity during transit.
This shift is of the order of tens of km s, whilst the Earth's telluric
and the stellar lines can be considered quasi-static. We took advantage of this
to remove the telluric and stellar lines using SYSREM, a principal component
analysis algorithm. The residual spectra contain the signal from thousands of
planetary molecular lines well below the noise level. We retrieve this
information by cross-correlating the spectra with models of the atmospheric
absorption.
Results: We find evidence of HO in HD 209458 b with a signal-to-noise
ratio (S/N) of 6.4. The signal is blueshifted by --5.2 km
s, which, despite the error bars, is a firm indication of day-to-night
winds at the terminator of this hot Jupiter. Additionally, we performed a
multi-band study for the detection of HO individually from the three NIR
bands covered by CARMENES. We detect HO from its 1.0 m band with a S/N
of 5.8, and also find hints from the 1.15 m band, with a low S/N of 2.8.
No clear planetary signal is found from the 1.4 m band.
Conclusions: Our significant signal from the 1.0 m band in HD 209458 b
represents the first detection of HO from this band, the bluest one to
date. The unfavorable observational conditions might be the reason for the
inconclusive detection from the stronger 1.15 and 1.4 m bands. HO is
detected from the 1.0 m band in HD 209458 b, but hardly in HD 189733 b,
which supports a stronger aerosol extinction in the latter.Comment: 11 pages, 10 figures; accepted for publication in A&
Модернизация автоматизированной системы блока стабилизации давления магистрального насосного агрегата на нефтеперекачивающей станции
Объектом исследования является блок стабилизации давления магистрального насосного агрегата. Цель работы – модернизация автоматизированной системы блока стабилизации давления магистрального трубопровода нефтеперекачивающей станции с использованием ПЛК, на основе выбранной SCADA-системы. В данном проекте была разработана система контроля и управления технологическим процессом на базе промышленных контроллеров Modicon M340 BMXP34 2020, с применением SCADA-системы.The object of investigation is the pressure stabilization unit of the main pump unit. The purpose of the work is the modernization of the automated system for stabilizing the pressure of the main pipeline of the oil pumping station using PLCs, based on the SCADA system chosen. In this project, a system for monitoring and controlling the process was developed on the basis of industrial controllers Modicon M340 BMXP34 2020, using a SCADA system
Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds
The search of life in the Universe is a fundamental problem of astrobiology and a major priority for NASA. A key area of major progress since the NASA Astrobiology Strategy 2015 (NAS15) has been a shift from the exoplanet discovery phase to a phase of characterization and modeling of the physics and chemistry of exoplanetary atmospheres, and the development of observational strategies for the search for life in the Universe by combining expertise from four NASA science disciplines including heliophysics, astrophysics, planetary science and Earth science. The NASA Nexus for Exoplanetary System Science (NExSS) has provided an efficient environment for such interdisciplinary studies. Solar flares, coronal mass ejections and solar energetic particles produce disturbances in interplanetary space collectively referred to as space weather, which interacts with the Earth upper atmosphere and causes dramatic impact on space and ground-based technological systems. Exoplanets within close in habitable zones around M dwarfs and other active stars are exposed to extreme ionizing radiation fluxes, thus making exoplanetary space weather (ESW) effects a crucial factor of habitability. In this paper, we describe the recent developments and provide recommendations in this interdisciplinary effort with the focus on the impacts of ESW on habitability, and the prospects for future progress in searching for signs of life in the Universe as the outcome of the NExSS workshop held in Nov 29 - Dec 2, 2016, New Orleans, LA. This is one of five Life Beyond the Solar System white papers submitted by NExSS to the National Academy of Sciences in support of the Astrobiology Science Strategy for the Search for Life in the Universe