Results 61 to 70 of about 362,838 (268)

ISO spectroscopy of circumstellar dust in 14 Herbig Ae/Be systems: Towards an understanding of dust processing [PDF]

, 2000
We present Infrared Space Observatory (ISO) spectra of fourteen isolated Herbig Ae/Be (HAEBE) stars, to study the characteristics of their circumstellar dust. These spectra show large star-to-star differences, in the emission features of both carbon-rich
G. Meeus, L. Waters, L. Waters, J. Bouwman, M. V. D. Ancker, M. V. D. Ancker, C. Waelkens, K. Malfait   +7 more
semanticscholar   +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

Extensive HST ultraviolet spectra and multiwavelength observations of SN 2014J in M82 indicate reddening and circumstellar scattering by typical dust [PDF]

, 2014
SN 2014J in M82 is the closest detected Type Ia supernova (SN Ia) in at least 28 years and perhaps in 410 years. Despite its small distance of 3.3 Mpc, SN 2014J is surprisingly faint, peaking at V = 10.6 mag, and assuming a typical SN Ia luminosity, we ...
R. Foley, O. Fox, C. McCully, M. Phillips, D. Sand, Weikang Zheng, P. Challis, A. Filippenko, G. Folatelli, W. Hillebrandt, E. Hsiao, S. Jha, R. Kirshner, M. Kromer, G. H. Marion, M. Nelson, R. Pakmor, G. Pignata, F. Roepke, I. Seitenzahl, J. Silverman, M. Skrutskie, M. Stritzinger   +22 more
semanticscholar   +1 more source

Clusters Stagnating During Condensation: Metastable Material or a Separate State of Matter?

Annalen der Physik, Volume 537, Issue 10, October 2025.
Condensation stagnation, that is, the existence of a delay between nucleation and growth during the gas‐phase particle formation, is a crucial phenomenon, which manifests itself as the presence of supercritical clusters in resulting particulates. The light emission signature of stagnant clusters is identified in the magnesium particle flame in air, and,
Nicholas R. Jaramillo, Cole A. Ritchie, Michelle L. Pantoya, Igor E. Agranovski, Igor Altman   +4 more
wiley   +1 more source

Composite grains: Application to circumstellar dust

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
Using the discrete dipole approximation (DDA) we calculate the absorption efficiency of the composite grain, made up of a host silicate spheroid and inclusions of graphite, in the spectral region 5.0-25.0μm.
D. B. Vaidya, R. Gupta
doaj   +1 more source

SN 2020uem: a Possible Thermonuclear Explosion within a Dense Circumstellar Medium. I. The Nature of Type IIn/Ia-CSM SNe from Photometry and Spectroscopy

The Astrophysical Journal, 2023
We have performed intensive follow-up observations of a Type IIn/Ia-CSM supernova (SN IIn/Ia-CSM), 2020uem, with photometry, spectroscopy, and polarimetry. In this paper, we report on the results of our observations focusing on optical/near-infrared (NIR)
Kohki Uno, Keiichi Maeda, Takashi Nagao, Tatsuya Nakaoka, Kentaro Motohara, Akito Tajitsu, Masahiro Konishi, Shuhei Koyama, Hidenori Takahashi, Masaomi Tanaka, Hanindyo Kuncarayakti, Miho Kawabata, Masayuki Yamanaka, Kentaro Aoki, Keisuke Isogai, Kenta Taguchi, Mao Ogawa, Koji S. Kawabata, Yuzuru Yoshii, Takashi Miyata, Ryo Imazawa   +20 more
doaj   +1 more source

Infrared Signatures of Disrupted Minor Planets at White Dwarfs

, 2009
Spitzer Space Observatory IRAC and MIPS photometric observations are presented for 20 white dwarfs with T < 20,000 K and metal-contaminated photospheres.
B. Zuckerman, Becklin, Brinkworth, Chen, Chiang, Dahn, Debes, Debes, Desharnais, Dufour, Farihi, Farihi, Farihi, Farihi, Farihi, Fazio, Fixsen, Friedrich, Friedrich, Giclas, Gänsicke, Gänsicke, Hansen, Hoard, Holberg, Holberg, Holberg, Ida, J. Farihi, Jura, Jura, Jura, Jura, Jura, Jura, Kawka, Kawka, Kilic, Kilic, Kilic, Kilic, Lepine, Liebert, Liebert, M. Jura, Marleau, McCook, McCook, Monet, Mullally, Napiwotzki, Perryman, Reach, Rieke, Salim, Skrutskie, von Hippel, Vrba, Zuckerman, Zuckerman, Zuckerman   +60 more
core   +1 more source

Near-infrared Integral-field Spectroscopy of the Wind Forming Region of CW Leo

The Astronomical Journal
The circumstellar envelope of the carbon star CW Leo exhibited various unexpected changes in recent optical imaging observations. We have performed a follow-up observation using the Near-infrared Integral-Field Spectrograph (NIFS) equipped on the Gemini ...
Hyosun Kim, Youichi Ohyama, Ho-Gyu Lee, Ji Hoon Kim   +3 more
doaj   +1 more source

Interrelationships between interstellar and interplanetary grains [PDF]

, 1986
The relationship between solar system dust (SSD) and interstellar dust particles (ISMD) is being reconsidered because of the discovery of isotopic anomalies in meteorites.
Clayton, D. D.
core   +2 more sources

JWST Imaging of the Closest Globular Clusters—V. The White Dwarfs Cooling Sequence of M4

Astronomische Nachrichten, Volume 346, Issue 2, February 2025.
ABSTRACT We combine infrared (IR) observations collected by the James Webb Space Telescope with optical deep images by the Hubble Space Telescope taken ~20 years earlier to compute proper‐motion membership for the globular cluster (GC) M4 (NGC 6121) along its entire white dwarf (WD) cooling sequence (CS).
Luigi R. Bedin, Mattia Libralato, Maurizio Salaris, Domenico Nardiello, Michele Scalco, Massimo Griggio, Jay Anderson, Pierre Bergeron, Andrea Bellini, Roman Gerasimov, Adam J. Burgasser, Daniel Apai   +11 more
wiley   +1 more source