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We present a 0.5"-resolution diffraction-limited 17.7 micron image of the red supergiant Antares obtained with the VLT mid-infrared instrument VISIR. The VISIR image shows six clumpy dust clouds located at 0.8"--1.8" (43--96 stellar radii =…

太阳与恒星天体物理 · 物理学 2015-06-22 Keiichi Ohnaka

We identify a molecular bubble, and study the star formation and its feedback in the S Mon region, using multiple molecular lines, young stellar objects (YSOs), and infrared data. We revisit the distance to S Mon, ~722+/-9 pc, using Gaia…

Bright, short duration X-ray flares from accreting compact objects produce thin, dust scattering rings that enable dust echo tomography: high precision distance measurements and mapping of the line-of-sight distribution of dust. This work…

高能天体物理现象 · 物理学 2019-04-10 Lia Corrales , Brianna S. Mills , Sebastian Heinz , Gerard M. Williger

Panchromatic analysis of galaxy spectral energy distributions, spanning from the ultraviolet to the far-infrared, probes not only the stellar population but also the properties of interstellar dust through its extinction and long-wavelength…

星系天体物理 · 物理学 2023-09-07 G. T. Jones , E. R. Stanway

We review recent progress in high-resolution imaging of scattered light from disks around young stellar objects. Many new disks have been discovered or imaged in scattered light, and improved instrumentation and observing techniques have…

天体物理学 · 物理学 2007-07-19 Alan M. Watson , Karl R. Stapelfeldt , Kenneth Wood , François Ménard

(Abridged) We present the first detections of the mean flux of the optical extragalactic background light (EBL) at 3000, 5500, and 8000A. Diffuse foreground flux at these wavelengths comes from terrestrial airglow, dust-scattered sunlight…

天体物理学 · 物理学 2009-11-07 R. A. Bernstein , W. L. Freedman , B. F. Madore

The dust shell around the evolved star HD 179821 has been detected in scattered light in near-IR imaging polarimetry observations. Here, we subtract the contribution of the unpolarized stellar light to obtain an intrinsic linear…

天体物理学 · 物理学 2009-11-07 T. M. Gledhill , M. Takami

We analyze the molecular gas and dust associated with the infrared dark cloud SDC 341.232-0.268 in order to investigate the characteristics and parameters of the gas, determine the evolutionary status of four embedded EGO candidates and…

星系天体物理 · 物理学 2020-01-15 M. M. Vazzano , C. E. Cappa , V. Firpo , C. H. López-Caraballo , M. Rubio , N. U. Duronea

Distance estimates derived from spectroscopy or parallax have been unified by considering extinction by large grains. The addition of such a population of what is called Dark Dust to models of the diffuse interstellar medium is tested…

星系天体物理 · 物理学 2023-02-22 Ralf Siebenmorgen

Theoretical arguments suggest that dust grains should grow in the dense cold parts of molecular clouds. Evidence of larger grains has so far been gathered in near/mid infrared extinction and millimeter observations. Interpreting the data…

星系天体物理 · 物理学 2015-05-14 J. Steinacker , L. Pagani , A. Bacmann , S. Guieu

Emission lines from complex organic molecules in B335 were observed in four epochs, spanning a luminosity burst of about 10 years duration. The emission lines increased dramatically in intensity as the luminosity increased, but they have…

太阳与恒星天体物理 · 物理学 2024-10-10 Jeong-Eun Lee , Neal J. Evans , Giseon Baek , Chul-Hwan Kim , Jinyoung Noh , Yao-Lun Yang

X-ray bright quasars might be used to trace dust in the circumgalactic and intergalactic medium through the phenomenon of X-ray scattering, which is observed around Galactic objects whose light passes through a sufficient column of…

高能天体物理现象 · 物理学 2015-05-27 Lia Corrales

We present a search for infrared dust emission associated with the Leo cloud, a large intergalactic cloud in the M96 group. Mid-infrared and far-infrared images were obtained with IRAC and MIPS on the Spitzer Space Telescope. Our analysis…

宇宙学与河外天体物理 · 物理学 2015-05-13 C. Bot , G. Helou , W. B. Latter , J. Puget , S. Schneider , Y. Terzian

We study the evolution of the FU Ori object V960 Mon since its outburst, using available multi-wavelength photometric time series over 8 years, complemented by several epochs of moderate-dispersion spectrophotometry. We find that the source…

We investigate the environment of the infrared dust bubble S51 and search for evidence of triggered star formation in its surroundings. We performed a multiwavelength study of the region around S51 with data taken from large-scale surveys:…

星系天体物理 · 物理学 2012-07-03 Chuan Peng Zhang , Jun Jie Wang

We present the results of the high-resolution spectroscopy of the FU Orionis-type star V960 Mon. The brightness of V960 Mon decreased continuously after the outburst was detected in 2014 November. During this dimming event, we have carried…

太阳与恒星天体物理 · 物理学 2020-12-02 Yuhei Takagi , Satoshi Honda , Akira Arai , Jun Takahashi , Yumiko Oasa , Yoichi Itoh

We report on sensitive sub-mm imaging observations of the prototype Seyfert~2/starburst galaxy NGC 1068 at 850 $\mu $m and 450 $\mu $m using the Submillimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT).…

天体物理学 · 物理学 2009-10-31 Padeli P. Papadopoulos , E. R. Seaquist

We present the first high spatial resolution monitoring of the dust forming nova V1280 Sco performed with the Very Large Telescope Interferometer (VLTI). Spectra and visibilities were obtained from the onset of the dust formation 23 days…

We present a $0.8-2.5\,\mu$m spectrum of the Very Late Thermal Pulse object V4334 Sgr (Sakurai's Object), obtained in 2020 September. The spectrum displays a continuum that rises strongly to longer wavelengths, and is considerably brighter…

太阳与恒星天体物理 · 物理学 2022-01-26 A. Evans , D. P. K. Banerjee , T. R. Geballe , R. D. Gehrz , C. E. Woodward , K. Hinkle , R. R. Joyce , M. Shahbandeh

Spitzer Space Telescope observations revealed powerful mid-infrared (mid-IR) H2 rotational line emission from the Stephan's Quintet (SQ) X-ray emitting large scale shock associated with a collision between two galaxies. Because H2 forms on…

宇宙学与河外天体物理 · 物理学 2015-05-18 P. Guillard , F. Boulanger , M. E. Cluver , P. N. Appleton , G. Pineau des Forets , P. Ogle