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To limit global warming to pre-industrial levels, global governments, industry and academia are taking aggressive efforts to reduce carbon emissions. The evaluation of anthropogenic carbon dioxide (CO$_2$) emissions, however, depends on the…

大气与海洋物理 · 物理学 2022-10-25 Zhengwen Zhang , Jinjin Gu , Junhua Zhao , Jianwei Huang , Haifeng Wu

The N$_2$ and CO-rich and water-depleted comet C/2016 R2 (Pan-STARRS) (hereafter `C/2016 R2') is a unique comet for detailed spectroscopic analysis. We aim to explore the associated photochemistry of parent species, which produces different…

地球与行星天体物理 · 物理学 2020-03-25 S. Raghuram , D. Hutsemékers , C. Opitom , E. Jehin , A. Bhardwaj , J. Manfroid

System identification method (SIM) was used to evaluate the Earth equilibrium climate sensitivity. According to our simulations, the equilibrium climate sensitivity was found to be between 2 deg C and 7 deg C. Analysis of the changes in…

大气与海洋物理 · 物理学 2025-12-16 Alexei V Karnaukhov , Sergei F Lyuksyutov , Artem V Aliakin , Mikhail E Prokhorov , Sergei I Blinnikov

Spectral line intensity mapping has been proposed as a promising tool to efficiently probe the cosmic reionization and the large-scale structure. Without detecting individual sources, line intensity mapping makes use of all available…

宇宙学与河外天体物理 · 物理学 2016-12-14 Yun-Ting Cheng , Tzu-Ching Chang , James Bock , C. Matt Bradford , Asantha Cooray

We aim to explore the capabilities of dust emission and rays for probing the properties of the interstellar medium in the nearby anti-centre region, using gamma-ray observations with the Fermi Large Area Telescope (LAT), and the thermal…

高能天体物理现象 · 物理学 2017-05-10 Q. Remy , I. A. Grenier , D. J. Marshall , J. M. Casandjian

We report the first detection of gas-phase CO2 emission in the star-forming region Cepheus A East, obtained by spectral line mapping of the v2 bending mode at 14.98 micron with the Infrared Spectrograph (IRS) instrument onboard the Spitzer…

We present an analysis of observations with the Atacama Large (sub-)Millimetre Array (ALMA) of the 380 GHz water emission line and CO (11-10) emission line from MG J0414+0534, a gravitationally lensed dusty star-forming galaxy that hosts a…

星系天体物理 · 物理学 2020-02-19 H. R. Stacey , A. Lafontaine , J. P. McKean

Images of dust continuum and carbon monoxide (CO) line emission are powerful tools for deducing structural characteristics of galaxies, such as disk sizes, H$_2$ gas velocity fields and enclosed H$_2$ and dynamical masses. We report on a…

We present optical high-resolution spectra of a sample of sixteen post-AGB stars and IRC +10216. Of the post-AGB stars, ten show C2 Phillips and Swan and CN Red System absorption, one CH+ emission, one CH+ absorption, and four without any…

天体物理学 · 物理学 2016-08-30 Eric J. Bakker , Ewine F. van Dishoeck , L. B. F. M. Waters , Ton Schoenmaker

Carbon monoxide (CO) emission has been observed in a number of core-collapse supernovae (SNe) and is known to be an important coolant at late times. We have implemented a chemical reaction network in the radiative-transfer code CMFGEN to…

太阳与恒星天体物理 · 物理学 2024-06-28 Collin McLeod , D. John Hillier , Luc Dessart

Although the scientific principles of anthropogenic climate change are well-established, existing calculations of the warming effect of carbon dioxide rely on spectral absorption databases, which obscures the physical foundations of the…

地球与行星天体物理 · 物理学 2024-01-30 Robin Wordsworth , Jacob Seeley , Keith Shine

Future space-based telescopes, such as the Wide-Field Infrared Survey Telescope (WFIRST), will observe the reflected-light spectra of directly imaged extrasolar planets. Interpretation of such data presents a number of novel challenges,…

地球与行星天体物理 · 物理学 2017-02-01 Michael Nayak , Roxana Lupu , Mark Marley , Jonathan Fortney , Tyler Robinson , Nikole Lewis

Geological Carbon Storage (GCS) is a key technology for achieving global climate goals by capturing and storing CO2 in deep geological formations. Its effectiveness and safety rely on accurate monitoring of subsurface CO2 migration using…

计算物理 · 物理学 2025-02-12 Abhinav Prakash Gahlot , Rafael Orozco , Felix J. Herrmann

The most recent concern of all people on Earth is the increase in the concentration of greenhouse gas in the atmosphere. The concentration of these gases has risen rapidly over the last century and if the trend continues it can cause many…

机器学习 · 计算机科学 2022-11-16 Samveg Shah , Shubham Thakar , Kashish Jain , Bhavya Shah , Sudhir Dhage

We report the preliminary results of a survey for water vapor in a sample of eight C stars with large mid-IR continuum fluxes: V384 Per, CIT 6, V Hya, Y CVn, IRAS 15194-5115, V Cyg, S Cep, and IRC+40540. This survey, performed using the…

The H II region W40 harbors a small group of young, hot stars behind roughly 9 magnitudes of visual extinction. We have detected gaseous carbon monoxide (CO) and diatomic carbon (C_2) in absorption toward the star W40 IRS 1a. The 2-0 R0,…

天体物理学 · 物理学 2009-10-31 R. Y. Shuping , T. P. Snow , R. Crutcher , B. L. Lutz

We have identified 139 cool carbon stars in the near-infrared spectro-photometric survey of the InfraRed Telescope in Space (IRTS) from the conspicuous presence of molecular absorption bands at 1.8, 3.1 and 3.8 microns. Among them 14 are…

天体物理学 · 物理学 2007-05-23 T. Le Bertre , M. Tanaka , I. Yamamura , H. Murakami , D. J. MacConnell

We present near-infrared spectroscopy of the NGC 5128 supernova SN 2016adj in the first 2 months following discovery. We report the detection of first overtone carbon monoxide emission at $\sim58.2$ d after discovery, one of the earliest…

The initial discovery of LIGO on 14 September 2015 was the inspiral merger and ring-down of the black hole binary at a distance of about 500~Mpc or a redshift of about 0.1. The search for electromagnetic counterparts for the inspiral of…

高能天体物理现象 · 物理学 2016-08-17 Elisa Antolini , Jeremy S. Heyl

We present a millimetre molecular line survey of seven high mass loss rate carbon stars in both the northern and southern skies. A total of 196 emission lines (47 transitions) from 24 molecular species were detected. The observed CO…

天体物理学 · 物理学 2009-11-07 P. M. Woods , F. L. Schoeier , L. -A. Nyman , H. Olofsson