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Related papers: An evolved disk surrounding the massive main seque…

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We present deep 1.2 millimeter photometry of 37 stars in the young (5 Myr) Upper Scorpius OB association, sensitive to ~4 x 10^-3 Mjup of cool millimeter dust. Disks around four low- and solar-mass stars are detected, as well as one debris…

Solar and Stellar Astrophysics · Physics 2015-06-03 Geoffrey S. Mathews , Jonathan P. Williams , Francois Ménard , Neil Phillips , Gaspard Duchêne , Christophe Pinte

A significant fraction of nearby young moving group members harbor circumstellar debris dust disks. Due to their proximity and youth, these disks are attractive targets for studying the early evolution of debris dust and planetesimal belts.…

Solar and Stellar Astrophysics · Physics 2016-08-03 A. Moór , Á. Kóspál , P. Ábrahám , Z. Balog , T. Csengeri , Th. Henning , A. Juhász , Cs. Kiss

We present the first subarcsecond-resolution images at multiple mid-IR wavelengths of the thermally-emitting dust around the A0 star HD 32297. Our observations with T-ReCS at Gemini South reveal a nearly edge-on resolved disk at both 11.7…

There is increasing evidence that low mass stars with circumstellar disks can be born close to massive stars, in some cases within tenths of a pc. If the disks have lifetimes greater than those of the more massive stars, they are exposed to…

Astrophysics · Physics 2009-10-31 Roger A. Chevalier

The formation process of massive stars is not well understood, and advancement in our understanding benefits from high resolution observations and modelling of the gas and dust surrounding individual high-mass (proto)stars. Here we report…

Solar and Stellar Astrophysics · Physics 2016-08-22 J. D. Ilee , C. J. Cyganowski , P. Nazari , T. R. Hunter , C. L. Brogan , D. H. Forgan , Q. Zhang

In the high density environments of circumstellar disks dust grains are expected to grow to large sizes by coagulation. Somewhat unexpectedly, recent near-IR observations of PAH features from disks around Herbig Ae/Be stars demonstrate that…

Astrophysics · Physics 2009-11-11 Roman R. Rafikov

The paper investigates the properties of the dust mass loss in stars populating the giant branch of the globular cluster 47 Tuc, by combining ISOCAM and DENIS data. Raster maps of 5 fields covering areas ranging from 4 x 4 to 15 x 15…

Astrophysics · Physics 2010-02-18 A. Ramdani , A. Jorissen

We report ALMA Cycle 2 observations of 230 GHz (1.3 mm) dust continuum emission, and $^{12}$CO, $^{13}$CO, and C$^{18}$O J = 2-1 line emission, from the Upper Scorpius transitional disk [PZ99] J160421.7-213028, with an angular resolution of…

In this Letter we investigate the origin of the near-infrared emission of the Herbig Ae star MWC 758 on sub-astronomical unit (AU) scales using spectrally dispersed low resolution (R=35) AMBER/VLTI interferometric observations both in the H…

Astrophysics · Physics 2009-11-13 A. Isella , E. Tatulli , A. Natta , L. Testi

We present new Atacama Large Millimeter/sub-millimeter Array (ALMA) 1.3 mm continuum observations of the SR 24S transition disk with an angular resolution $\lesssim0.18"$ (12 au radius). We perform a multi-wavelength investigation by…

Earth and Planetary Astrophysics · Physics 2017-04-26 P. Pinilla , L. M. Pérez , S. Andrews , N. van der Marel , E. F. van Dishoeck , S. Ataiee , M. Benisty , T. Birnstiel , A. Juhász , A. Natta , L. Ricci , L. Testi

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the dust continuum emission at 1.3 mm and 12CO J=2-1 line emission of the transitional disk around DM Tau. DM Tau's disk is thought to possess a dust-free inner…

Earth and Planetary Astrophysics · Physics 2018-11-28 Tomoyuki Kudo , Jun Hashimoto , Takayuki Muto , Hauyu Baobab Liu , Ruobing Dong , Yasuhiro Hasegawa , Takashi Tsukagoshi , Mihoko Konishi

We report optical spectroscopic observations of the Be/gamma-ray binaries LSI+61303, MWC 148 and MWC 656. The peak separation and equivalent widths of prominent emission lines (H-alpha, H-beta, H-gamma, HeI, and FeII) are measured. We…

Solar and Stellar Astrophysics · Physics 2016-10-05 R. K. Zamanov , K. A. Stoyanov , J. Marti , G. Y. Latev , Y. M. Nikolov , M. F. Bode , P. L. Luque-Escamilla

It is not yet known if the properties of molecular gas in distant protocluster galaxies are significantly affected by their environment as galaxies are in local clusters. Through a deep, 64 hours of effective on-source integration with the…

BP Psc is a puzzling late-type, emission-line field star with large infrared excess. The star is encircled and enshrouded by a nearly edge-on, dust circumstellar disk, and displays an extensive jet system similar to those associated with…

Astrophysics · Physics 2009-11-13 Joel H. Kastner , B. Zuckerman , Thierry Forveille

We present near-infrared spectra of the excess continuum emission from the innermost regions of classical T Tauri disks. In almost all cases, the shape of the excess is consistent with that of a single-temperature blackbody with T ~ 1400 K,…

Astrophysics · Physics 2009-11-10 James Muzerolle , Nuria Calvet , Lee Hartmann , Paola D'Alessio

(Abridged) We present results from a JCMT/SCUBA 850 um search for cold dust around nearby young stars belonging to the beta Pic (t~12 Myr) and the Local Association (t~50 Myr) moving groups. Unlike most past sub-mm studies, our sample was…

Astrophysics · Physics 2009-11-10 Michael C. Liu , Brenda C. Matthews , Jonathan P. Williams , Paul G. Kalas

We report the results of H13CO+(1-0), CO(1-0), and 3.3 mm dust continuum observations toward one of the strongest mm-wave sources in OMC-3, MMS 7, with the Nobeyama Millimeter Array (NMA) and the Nobeyama 45 m telescope. With the NMA, we…

Astrophysics · Physics 2008-11-26 Satoko Takahashi , Masao Saito , Shigehisa Takakuwa , Ryohei Kawabe

We present a CO(2-1) and 1240 um continuum survey of 23 debris disks with spectral types B9-G1, observed at an angular resolution of 0.5-1 arcsec with the Atacama Large Millimeter/Submillimeter Array (ALMA). The sample was selected for…

Earth and Planetary Astrophysics · Physics 2016-08-31 Jesse Lieman-Sifry , A. Meredith Hughes , John M. Carpenter , Uma Gorti , Antonio Hales , Kevin M. Flaherty

We present interferometric observations with the Atacama Large Millimeter Array (ALMA) of the free-free continuum and recombination line emission at 1 and 3mm of the "Red Square Nebula" surrounding the B[e]-type star MWC922. The unknown…

Solar and Stellar Astrophysics · Physics 2019-09-18 C. Sánchez Contreras , A. Báez-Rubio , J. Alcolea , A. Castro-Carrizo , V. Bujarrabal , J. Martín-Pintado , D. Tafoya