Results 31 to 40 of about 13,043 (174)

Tracing large-scale structures in circumstellar disks with ALMA

, 2012
Planets are supposed to form in circumstellar disks. The gravitational potential of a planet perturbs the disk and leads to characteristic structures, i.e. spiral waves and gaps, in the disk's density profile.
Klahr, Hubert H., Ruge, Jan Philipp, Uribe, Ana L., Wolf, Sebastian   +3 more
core   +1 more source

The Unusual Spitzer Spectrum of the Carbon Star IRAS 04496–6958: A Different Condensation Sequence in the LMC? [PDF]

, 2006
We present a new Spitzer Infrared Spectrograph (IRS) spectrum of the carbon star IRAS 04496-6958 in the Large Magellanic Cloud, which exhibits a fairly broad absorption feature at ~11 μm.
Cami, Jan, Dijkstra, Catharinus, Kemper, Ciska, Leisenring, Jarron, Markwick-Kemper, Ciska, Meixner, Margaret, Speck, Angela K., Szczerba, Ryszard, Van Dyk, Schuyler   +8 more
core   +1 more source

The Circumstellar Disk of the Butterfly Star in Taurus

, 2003
We present a model of the circumstellar environment of the so-called ``Butterfly Star'' in Taurus (IRAS 04302+2247). The appearance of this young stellar object is dominated by a large circumstellar disk seen edge-on and the light scattering lobes above ...
Bontemps S., Deborah L. Padgett, Dollfus A., Elvius A., Karl R. Stapelfeldt, Lucas P. W., Lucy L. B., Lynden-Bell D., Scarrott S., Sebastian Wolf, Shakura N. I., Ward-Thompson D., Weidenschilling S. J., Wolf S.   +13 more
core   +2 more sources

Relation between the luminosity of young stellar objects and their circumstellar environment [PDF]

, 2006
We present a new model-independent method of comparison of NIR visibility data of YSOs. The method is based on scaling the measured baseline with the YSO's distance and luminosity, which removes the dependence of visibility on these two variables. We use
Bibo E. A., Chavarria K., C., Chini R., Claria J. J., Clarke C. J., de Lara E., Dejan Vinković, Dorschner J., Drew J. E., Finkenzeller U., Friedemann C., Friedjung M., Fuente A., Grady C. A., Grinin V. P., Hutchinson M. G., Ivezic, Ivezic, Lynden-Bell D., Miroshnichenko A., Natta A., Porter J. M., Shevchenko V. S., Sitko M. L., Straizys V., Terranegra L., Tomislav Jurkić, van den Ancker M. E., van den Ancker M. E.   +28 more
core   +2 more sources

The Presolar Grain Database. I. Silicon Carbide

The Astrophysical Journal Supplement Series
The Presolar Grain Database (PGD) contains the vast majority of isotope data (published and unpublished) on presolar grains and was first released as a collection of spreadsheets in 2009.
Thomas Stephan, Reto Trappitsch, Peter Hoppe, Andrew M. Davis, Maitrayee Bose, Asmaa Boujibar, Frank Gyngard, K. Mairin Hynes, Nan Liu, Larry R. Nittler, Ryan C. Ogliore   +10 more
doaj   +1 more source

The abundance of SiS in circumstellar envelopes around AGB stars

, 2007
New SiS multi-transition (sub-)millimetre line observations of a sample of AGB stars with varying photospheric C/O-ratios and mass-loss rates are presented.
Agúndez, Bieging, Bieging, Boyle, Bujarrabal, Cherchneff, Duari, F. L. Schöier, Fonfría Expósito, Ford, Glassgold, González Delgado, Groenewegen, Groenewegen, H. Olofsson, Hasegawa, Höfner, Ivezic, J. Bast, Keady, Kerschbaum, Lindqvist, Lindqvist, Lucas, M. Lindqvist, Marvel, Melnick, Olofsson, Olofsson, Ramstedt, Scalo, Schöier, Schöier, Schöier, Schöier, Schöier, Schöier, Schöier, Suh, Tenenbaum, van Zadelhoff, Willacy, Willacy, Wirsich, Woitke, Woods   +45 more
core   +1 more source

Photoelectron Spectroscopy of the Phosphorus Monosulfide (PS) and Phosphorus Monoxide (PO) Radicals

Small Structures, Volume 7, Issue 1, January 2026.
Sketch of the experiment to measure the photo electron spectrum of the PS radical produced in situ with a mixture of PH3, H2S and F atoms. PO and PS radicals are the smallest units of phosphorus oxides and phosphorus sulfides, respectively, two rich families of refractory compounds widely employed in industrial and technological applications. These two
Pedro Recio, Jorge Alonso de la Fuente, Myriam Drissi, Niyazi Bulut, Jean Christophe Loison, Gustavo Garcia, Susana Gomez Carrasco, Cristina Sanz Sanz, Luis Bañares, Sonia Marggi Poullain, Alexandre Zanchet   +10 more
wiley   +1 more source

Correlated Molybdenum, Ruthenium, and Barium Isotope Anomalies in Presolar Silicon Carbide Grains

The Astrophysical Journal
We have analyzed molybdenum, ruthenium, and barium isotopes simultaneously in 55 individual presolar silicon carbide (SiC) grains from the Murchison CM2 meteorite using the Chicago Instrument for Laser Ionization (or CHILI).
Thomas Stephan, Peter Hoppe, Andrew M. Davis, Julie M. Korsmeyer, Andrew Regula, Hannah E. Richards   +5 more
doaj   +1 more source

Dust Production around Carbon-Rich Stars: The Role of Metallicity

Universe, 2021
Background: Most of the stars in the Universe will end their evolution by losing their envelope during the thermally pulsing asymptotic giant branch (TP-AGB) phase, enriching the interstellar medium of galaxies with heavy elements, partially condensed ...
Ambra Nanni, Sergio Cristallo, Jacco Th. van Loon, Martin A. T. Groenewegen   +3 more
doaj   +1 more source

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source