Results 71 to 80 of about 3,493 (285)

High-dynamic-range extinction mapping of infrared dark clouds

, 2012
Context. Measuring the mass distribution of infrared dark clouds (IRDCs) over the wide dynamic range of their column densities is a fundamental obstacle in determining the initial conditions of high-mass star formation and star ...
J. C. Tan, J. Kainulainen
core   +1 more source

The Galactic Distribution of Infrared Dark Clouds

The Astrophysical Journal, 2008
CS (2-1) measurements toward a large sample of fourth Galactic quadrant infrared dark clouds (IRDCs) were made with the Australia Telescope National Facility Mopra telescope in order to establish their kinematic distances and Galactic distribution. Due to its large critical density, CS unambiguously separates the dense IRDCs from more diffuse giant ...
James M. Jackson, Susanna C. Finn, Jill M. Rathborne, Edward T. Chambers, Robert Simon   +4 more
openaire   +1 more source

Nanocellulose Alleviates Intrahepatic Cholestasis of Pregnancy via Gut Microbiota‐Mediated Bile Acid Homeostasis

Advanced Science, EarlyView.
Nanocellulose, derived from microcrystalline cellulose (MCC) through sulfuric acid hydrolysis or mechanical grinding to produce CNC or CNF, was tested in a rat ICP model. Particularly, CNF improved gut microbiota composition, reduced secondary bile acid metabolism, and restored bile acid homeostasis through modulation of the gut–liver axis.
Muhua Yu, Hongjie Dai, Xiaocui Zhong, Qibin Li, Hui Yuan, Yang Yang, Daiyong Huang, Lei Zhang, Rui Ran, Tian He, Yuanzhi Huang, Silas Villas‐Boas, Sergey Tumanov, Richard D. Cannon, Boris Novakovic, Richard Saffery, Yuhao Zhang, Xiaojing Dong, Ting‐Li Han   +18 more
wiley   +1 more source

HOW MANY INFRARED DARK CLOUDS CAN FORM MASSIVE STARS AND CLUSTERS? [PDF]

, 2010
We present a new assessment of the ability of Infrared Dark Clouds (IRDCs) to form massive stars and clusters. This is done by comparison with an empirical mass-size threshold for massive star formation (MSF).
Jens Kauffmann, Kauffmann, Jens, Thushara Pillai, Pillai, Thushara   +3 more
core   +1 more source

Hydrogen (H2) Recovery From Hydrogen Sulfide (H2S): Current Technologies, Challenges, and Future Outlook

Advanced Science, EarlyView.
ABSTRACT Hydrogen sulfide (H2S) can be transformed into hydrogen (H2) through several chemical and catalytic processes, offering a promising route for both waste treatment and clean H2 production. This colorless, flammable, and toxic gas is found abundantly in swamps, volcanoes, hot springs, sewages, other natural gas fields, and even in refineries and
Divyesh Cirikonda, Astrid Campos‐Mata, Sehmus Ozden, Shreyasi Chattopadhyay, Pulickel M. Ajayan   +4 more
wiley   +1 more source

Searching for Dark Galaxies with H I Detection from the Arecibo Legacy Fast ALFA (ALFALFA) Survey

The Astrophysical Journal Supplement Series
We present a catalog of 142 dark galaxy candidates in a region covered by the Arecibo Legacy Fast ALFA (ALFALFA) survey. We start with 344 ALFALFA H i sources without optical counterparts and remove those that do not seem to have a dark galaxy origin. To
Minseong Kwon, Ho Seong Hwang, Brian R. Kent, Ilsang Yoon, Gain Lee, Hyein Yoon   +5 more
doaj   +1 more source

The ALMA Survey of 70 μm Dark High-mass Clumps in Early Stages (ASHES). VIII. Dynamics of Embedded Dense Cores

The Astrophysical Journal, 2023
We present dynamical properties of 294 cores embedded in twelve IRDCs observed as part of the ASHES Survey. Protostellar cores have higher gas masses, surface densities, column densities, and volume densities than prestellar cores, indicating core mass ...
Shanghuo Li, Patricio Sanhueza, Qizhou Zhang, Garay Guido, Giovanni Sabatini, Kaho Morii, Xing Lu, Daniel Tafoya, Fumitaka Nakamura, Natsuko Izumi, Ken’ichi Tatematsu, Fei Li   +11 more
doaj   +1 more source

Fire from Ice - Massive Star Birth from Infrared Dark Clouds

, 2017
I review massive star formation in our Galaxy, focussing on initial conditions in Infrared Dark Clouds (IRDCs), including the search for massive pre-stellar cores (PSCs), and modeling of later stages of massive protostars, i.e., hot molecular cores (HMCs)
Tan, Jonathan,, Tan, Jonathan
core   +1 more source

Nanocurvature‐Activated Dipolar Polarization in M–N4 Single‐Atom Sites for High‐Performance Electromagnetic Wave Absorption

Advanced Science, EarlyView.
Increasing nanocurvature effectively enriches the local electron density of the M–N4 motif, which facilitates electron transfer from the metal center to nitrogen atoms. This electronic behavior intensifies the localization and asymmetric distribution of charge, thereby significantly amplifying the dipole moment and polarizability.
Daohu Sheng, Siyao Cheng, Mengmeng Zhang, Jinglei Zhang, Xufei Zhu, Weijin Li, Bo Zhang, Aming Xie   +7 more
wiley   +1 more source

The Structure of an 80 Parsec Long Massive Filament

The Astronomical Journal
Using new Institut de Radioastronomie Millimétrique 30 m telescope N _2 H ^+ , C ^18 O J  = 1–0 and Atacama Pathfinder Experiment telescope ^13 CO and C ^18 O J  = 2–1 maps together with archival far-infrared continuum data, and ^12 CO, and ^13 CO J  = 1–
Qian-Ru He, Won-Ju Kim, Gary A. Fuller, Alessio Traficante, Seamus D. Clarke, Yu Gao, Xue-Peng Chen, Min Fang, Ke Wang, En Chen, Tapas Baug, Xiao-Long Wang, Chen Wang, Yong-Xiong Wang   +13 more
doaj   +1 more source