Results 121 to 130 of about 2,211 (208)

Inhomogeneous Dust Biases Photometric Redshifts and Stellar Masses for LSST

The Astrophysical Journal Letters
Spectral energy distribution (SED) modeling is one of the main methods to estimate galaxy properties, such as photometric redshifts, z , and stellar masses, M _* , for extragalactic imaging surveys.
ChangHoon Hahn, Peter Melchior
doaj   +1 more source

Photocleavage of Aliphatic C–C Bonds in the Interstellar Medium

The Astrophysical Journal
Ultraviolet (UV) processing in the interstellar medium (ISM) induces the dehydrogenation of hydrocarbons. Aliphatics, including alkanes, are present in different interstellar environments, being prevalently formed in evolved stars; thus, the ...
Guillermo Tajuelo-Castilla, Jesús I. Mendieta-Moreno, Mario Accolla, Jesús M. Sobrado, Sofia Canola, Pavel Jelínek, Gary J. Ellis, José Ángel Martín-Gago, Gonzalo Santoro   +8 more
doaj   +1 more source

Low temperature MIR to submillimeter mass absorption coefficient of interstellar dust analogues

, 2017
Context. The submillimeter spectral domain has been extensively explored by the Herschel and Planck satellites and is now reachable from the ground with ALMA.
Meny, C., H. Leroux, V. Gromov, Toplis, M. J., Demyk, K., Lu, X.-H., Nayral, Céline, Papatheodorou, G., G. Papatheodorou, J.-B. Brubach, C. Nayral, C. Meny, P. Roy, Gromov, V., F. Delpech, Depecker, C., Brubach, J.-B., Roy, P., Delpech, Fabien, Leroux, H., W.-S. Ojo, X.-H. Lu, Paradis, D., D. Paradis, M. J. Toplis, C. Depecker, K. Demyk, Ojo, Wilfried-Solo   +27 more
core   +1 more source

Proposed Importance of HOCO Chemistry: Inefficient Formation of CO2 from CO and OH Reactions on Ice Dust

The Astrophysical Journal
With the advent of JWST ice observations, dedicated studies on the formation reactions of detected molecules are becoming increasingly important. One of the most interesting molecules in interstellar ice is CO _2 .
Atsuki Ishibashi, Germán Molpeceres, Hiroshi Hidaka, Yasuhiro Oba, Thanja Lamberts, Naoki Watanabe   +5 more
doaj   +1 more source

Sensitivity of Polarization to Grain Shape. II. Aggregates

The Astrophysical Journal
A previous study (Paper I) investigated the polarization properties of a variety of simple convex grain shapes, some of which were found to be consistent with the observed polarization properties of interstellar dust from far-ultraviolet to far-infrared.
B. T. Draine
doaj   +1 more source

Plasma generation and high energy electron processing of interstellar carbonaceous dust analogs

, 2017
Santiago de Compostela, Facultade de Química,17-21 julio 2017. -- http://www.bienalrsef2017.com/bienalrsef17/
Tanarro, Isabel, Herrero, Víctor J., Maté, Belén, Peláez, Ramón J., Molpeceres, Germán, Timón, Vicente, Escribano, Rafael, Jiménez-Redondo, Miguel   +7 more
openaire   +1 more source

Probing 3D Magnetic Fields Using Thermal Dust Polarization and Grain Alignment Theory

The Astrophysical Journal
Magnetic fields are ubiquitous in the Universe and are thought to play an important role in various astrophysical processes. Polarization of thermal emission from dust grains aligned with the magnetic field is widely used to measure the 2D magnetic field
Thiem Hoang, Bao Truong
doaj   +1 more source

The Ultraviolet Slopes of Early Universe Galaxies: The Impact of Bursty Star Formation, Dust, and Nebular Continuum Emission

The Astrophysical Journal
JWST has enabled the detection of the ultraviolet (UV) continuum of galaxies at z > 10, revealing extremely blue, potentially dust-free galaxies. However, interpreting UV spectra is complicated by the well-known degeneracy between stellar ages, dust ...
Desika Narayanan, Daniel P. Stark, Steven L. Finkelstein, Paul Torrey, Qi Li, Fergus Cullen, Micheal W. Topping, Federico Marinacci, Laura V. Sales, Xuejian Shen, Mark Vogelsberger   +10 more
doaj   +1 more source

Polycyclic Aromatic Hydrocarbon Emission in the Central Regions of Three Seyferts and the Implication for Underlying Feedback Mechanisms

The Astrophysical Journal Letters
We analyze JWST Mid-Infrared Instrument/Medium Resolution Spectrograph integral field unit observations of three Seyferts from the Galactic Activity, Torus, and Outflow Survey (GATOS) and showcase the intriguing polycyclic aromatic hydrocarbon (PAH) and ...
Lulu Zhang, Ismael García-Bernete, Chris Packham, Fergus R. Donnan, Dimitra Rigopoulou, Erin K. S. Hicks, Ric I. Davies, Taro T. Shimizu, Almudena Alonso-Herrero, Cristina Ramos Almeida, Miguel Pereira-Santaella, Claudio Ricci, Andrew J. Bunker, Mason T. Leist, David J. Rosario, Santiago García-Burillo, Laura Hermosa Muñoz, Francoise Combes, Masatoshi Imanishi, Alvaro Labiano, Donaji Esparza-Arredondo, Enrica Bellocchi, Anelise Audibert, Lindsay Fuller, Omaira González-Martín, Sebastian Hönig, Takuma Izumi, Nancy A. Levenson, Enrique López-Rodríguez, Daniel Rouan, Marko Stalevski, Martin J. Ward   +31 more
doaj   +1 more source

Macroscopic Monte Carlo modeling of interstellar dust grain surface and mantle chemical processes

, 2018
No starpzvaigžņu vides novērojumiem konstatēts, ka ap starpzvaigžņu putekļa kodolu aukstos apstākļos (T~10 K) aug ledus apvalciņš no apkārtējās vides gāzes vielām, kuras piesalst pie šī putekļa.
Narņickis, Raimonds
core