搜索结果: 1-15 共查到“天文学 Water”相关记录36条 . 查询时间(0.109 秒)
Researchers Detect Exoplanet with Glowing Water Atmosphere（图）
Researchers Detect Exoplanet Glowing Water Atmosphere
2017/9/1
Scientists have found compelling evidence for a stratosphere on an enormous planet outside our solar system. The planet’s stratosphere—a layer of atmosphere where temperature increases with higher alt...
Climate cycles may explain how running water carved Mars' surface features
Climate cycles running water carved Mars surface features
2016/12/13
Dramatic climate cycles on early Mars, triggered by buildup of greenhouse gases, may be the key to understanding how liquid water left its mark on the planet's surface, according to a team of planetar...
Interactive evolution of multiple water-ice reservoirs on Mars: Insights from hydrogen isotope compositions
Mars water ice isotope atmospheric escape
2017/4/10
Remote sensing data from orbiter missions have proposed that ground ice may currently exist on Mars, although the
volume is still uncertain. Recent analyses of Martian meteorites have suggested that ...
Mineralogical Confirmation for Liquid Water on Present-day Mars
Mineralogical Liquid Water Present-day Mars
2015/10/13
Lujendra Ojha, the Georgia Tech Ph.D. candidate who led the study, first noticed these puzzling features in High Resolution Imagine Science Experiment (HiRISE) images returned by the MRO spacecraft as...
Sensitive limits on the water abundance in cold low-mass molecular cores
formation submil
2014/12/26
We present Submillimeter Wave Astronomy Satellite observations of water vapor in two cold starless clouds, B68 and core D in ρ Ophiuchi. Sensitive nondetections of the 110-101 transition of o-H2O are ...
A survey of 557 GHz water vapor emission in the NGC 1333 molecular cloud
NGC 1333 jets and outfl ows
2014/12/24
Using NASA's Submillimeter Wave Astronomy Satellite (SWAS), we have examined the production of water in quiescent and shocked molecular gas through a survey of the 556.936 GHz 110-101 transition of or...
We have observed six clouds along the line of sight toward W49A using the Submillimeter Wave Astronomy Satellite and several ground-based observatories. The ortho-H2O 110 → 101 and OH (1665 and 1667 M...
We present detections of the ground-state 110→ 101 transition of ortho-H2O at 557 GHz in 18 molecular outflows based on data from the Submillimeter Wave Astronomy Satellite (SWAS). These results are c...
Herschel/HIFI measurements of the ortho/para ratio in water towards Sagittarius B2(M) and W31C*
gas dust
2014/12/22
We present Herschel/HIFI observations of the fundamental rotational transitions of ortho- and para-H216O and H218O in absorption towards Sagittarius B2(M) and W31C. The ortho/para ratio in water in th...
Simulating the D/H ratio of water formed in the early solar nebula
collapsing core solar nebula dust chemistry D/H ratio of water
2017/4/11
Our solar system originated from a protoplanetary disk about 4.6 billion years ago. We simulate the formation of this
disk by a three-stage model of the solar nebula (SN) which describes the hydrodyn...
The RMS Survey: Ammonia and water maser analysis of massive star forming regions
Stars: formation – Stars: early-type – ISM: molecules – ISM: radio lines
2011/10/12
The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra compact HII regions from a sample of ~2000 MSX and 2MASS colour selected sourc...
Interstellar ices as witnesses of star formation: selective deuteration of water and organic molecules unveiled
dust, extinction - ISM: abundances - ISM: molecules - stars: formation
2011/9/30
The environments where stars are born contain gas and dust grains covered by icy mantles. As the star forms and heats up its surroundings, the ices evaporate which leads to a very complex chemistry wi...
A Detailed Study on the Range Fluctuations of $10^{11}$eV to $10^{18}$eV Muons in Water and the Fluctuations of the Cherenkov Lights due to the Accompanied Cascade Showers initiated by Muons
the Range Fluctuations the Cherenkov Lights
2011/1/10
The validity of our Monte Carlo simulation procedure ({\it the integral method}) had been verified by the corresponding analytical procedure of which is quite independent of our method methodologicall...
Formation of Early Water Oceans on Rocky Planets
ocean magma ocean water planet atmosphere
2010/11/15
Terrestrial planets, with silicate mantles and metallic cores, are likely to obtain water and
carbon compounds during accretion. Here I examine the conditions that allow early formation of a surface ...
Two Epochs of Very Large Array Observations of Water Maser Emission in the active galaxy NGC 6240
galaxies active - galaxies individual (NGC 6240) - galaxies ISM - ISM - galaxies nuclei masers
2010/11/12
Studies of 22GHz H2O maser emission from the merging galaxy NGC 6240 with double nuclei are presented. Two epochs of Very Large Array (VLA) obser-vations in the A-configuration in spectral-line mode w...