Results 91 to 100 of about 4,364 (222)

The interstellar dust properties of nearby galaxies [PDF]

, 2018
International audienceThis article gives an overview of the constitution, physical conditions, and observables of dust in the interstellar medium of nearby galaxies.
Galametz, Maud, Galliano, Frédéric, Jones, Anthony P.   +2 more
core   +1 more source

Chiroptical properties of membrane glycerophospholipids and their chiral backbones

Chirality, Volume 36, Issue 3, March 2024.
Examination of the interaction of glycerophospholipids with circularly polarized light suggests that direct induction of symmetry breaking to membrane lipids by chiral photons is unlikely. However, anisotropy spectra of certain analogs indicate potential alternative mechanisms for the origins of membrane lipid homochirality, providing insights into the
Jana Bocková, Adrien D. Garcia, Nykola C. Jones, Søren V. Hoffmann, Cornelia Meinert   +4 more
wiley   +1 more source

Imaging the circumstellar dust around AGB stars with PolCor [PDF]

, 2011
Aims. The aim of this paper is to investigate how the new imaging Polarimeter and Coronograph (PolCor) at the Nordic Optical Telescope** (NOT) can be used in the study of circumstellar structures around AGB stars. The purpose is to prepare for a study of
H. Olofsson, Olofsson, G., Schöier, Fredrik L., G. Olofsson, Olofsson, Hans, F. L. Schöier, Maercker, M., Olofsson, G.,, Olofsson, H.,, Schoier, F. L., Ramstedt, S., Sch\uf6ier, Fredrik, Schöier, Fredrik,, Olofsson, Hans,, Maercker, Matthias, S. Ramstedt, Maercker, Matthias,, M. Maercker, Olofsson, Göran,, Ramstedt, S.,   +19 more
core   +1 more source

Dust Stratification in Young Circumstellar Disks [PDF]

, 2006
We present high-resolution infrared spectra of four YSOs (T Tau N, T Tau S, RNO 91, and HL Tau). The spectra exhibit narrow absorption lines of 12CO, 13CO, and C18O, as well as broad emission lines of gas-phase 12CO. The narrow absorption lines of CO are
Kulesa, Craig, Balsara, Dinshaw S, Brittain, Sean D, Simon, Theodore, Rettig, Terrence, Gibb, Erika, Tilley, David A   +6 more
core   +1 more source

Disk evolution, element abundances and cloud properties of young gas giant planets [PDF]

, 2014
ChHc and PBR highlights financial support of the European Community under the FP7 program by an ERC starting grant. PW, IK, and WFT acknowledge funding from the European Union Seventh Framework Programme FP7-2011 under grant agreement No.
Kamp, I., Peter Woitke, Woitke, P., Meijerink, R., Helling, C., Inga Kamp, Christiane Helling, Wing-Fai Thi, Kamp, Inga, Meijerink, Rowin, Woitke, Peter, Kamp, Inga; id_orcid, Rimmer, Paul B., Rowin Meijerink, Rimmer, P.B., Paul B. Rimmer, Thi, W.-F., Thi, Wing-Fai, Helling, Christiane, Paul Rimmer   +19 more
core   +1 more source

Synthetic Modeling of Polarized Dust Emission in Intermediate-mass Young Stellar Objects. II. Effects of Radiative Torque Disruption on Dust Grains in Protostellar Jets/Outflows

The Astrophysical Journal
One possible explanation for the presence of very large grains (VLGs) larger than 10 μ m in the inner envelope of intermediate-mass Class 0/I young stellar objects is their migration from the protostellar disk via outflows. To assess whether RATD hinders
Nguyen Chau Giang, V. J. M. Le Gouellec, Thiem Hoang, A. J. Maury, P. Hennebelle   +4 more
doaj   +1 more source

Multiband ALMA Polarization Observations of BHB 07-11 Reveal Aligned Dust Grains in Complex Spiral Arm Structures

The Astrophysical Journal
Polarization-mode observations from the Atacama Large Millimeter/submillimeter Array (ALMA) are powerful tools for studying the dust grain populations in circumstellar disks.
Austen Fourkas, Leslie W. Looney, Zhe-Yu Daniel Lin, Martin Radecki, Zhi-Yun Li, John J. Tobin, Ian W. Stephens, Manuel Fernández-López, Haifeng Yang, Woojin Kwon, Rachel Harrison   +10 more
doaj   +1 more source

The Role of Dust in Circumstellar Chemistry [PDF]

Symposium - International Astronomical Union, 1987
The outer envelopes of the outflows from late-type stars where the dust and molecules have already been formed and the matter has been accelerated to its terminal velocity are the focus of this review. One major role for grains in the circumstellar chemistry is the protection of molecules against photodissociation by ambient interstellar ultraviolet ...
openaire   +1 more source

Hydrodynamical models and synthetic spectra of circumstellar dust shells around AGB stars [PDF]

, 1997
We present a sample of hydrodynamical steady state models of circumstellar gas/dust shells around late type giants together with computed spectral energy distributions (SEDs).
M. Steffen, D. Schönberner, A. Men'shchikov, R. Szczerba   +3 more
core   +1 more source

Discovery of Volatile Gas in the Giant Impact Disk Around the 150 Myr Old HD 23514

The Astrophysical Journal Letters
We report the discovery of CO _2 gas emission around HD 23514, an F5V star in the ∼150 Myr old Pleiades cluster, hosting one of the rare giant-impact disks with unique mineralogy dominated by silica dust. We show that the dust feature remains stable over
Kate Y. L. Su, Attila Moór, Chengyan Xie, Ilaria Pascucci, George H. Rieke, Ágnes Kóspál, Mark C. Wyatt, Péter Ábrahám, Luca Matrà, Zoe Roumeliotis, D. J. Wilner   +10 more
doaj   +1 more source