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Related papers: High Resolution $\lambda$ = 2.7 mm Observations of…

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We present high angular resolution observations of the Class 0 protostar IRAM04191+1522, using the Submillimeter Array (SMA). The SMA 1.3 mm continuum images reveal within IRAM04191+1522 two distinct sources with an angular separation of…

Solar and Stellar Astrophysics · Physics 2015-06-04 Xuepeng Chen , Hector G. Arce , Michael M. Dunham , Qizhou Zhang

Context. The protoplanetary disk around the star HD 100546 displays prominent substructures in the form of two concentric rings. Recent observations with the Atacama Large Millimeter/sub-millimeter Array (ALMA) have revealed these features…

Earth and Planetary Astrophysics · Physics 2021-12-22 Max Ackermann Pyerin , Timmy N. Delage , Nicolás T. Kurtovic , Matías Gárate , Thomas Henning , Paola Pinilla

We observed the W51 high-mass star-forming complex with ALMA's longest-baseline configurations, achieving an angular resolution of $\sim$20 milliarcseconds, corresponding to a linear resolution of $\sim$100 au at $D_{\mathrm{W51}}=5.4$ kpc.…

Astrophysics of Galaxies · Physics 2020-12-23 Ciriaco Goddi , Adam Ginsburg , Luke Maud , Qizhou Zhang , Luis Zapata

We explore the infrared M band (4.7 um) spectrum of the class I protostar L1489 IRS in the Taurus Molecular Cloud. This is the highest resolution wide coverage spectrum at this wavelength of a low mass protostar observed to date (R=25,000;…

Astrophysics · Physics 2009-11-07 A. C. A. Boogert , M. R. Hogerheijde , G. A. Blake

We present centimeter and millimeter observations of gas and dust around IRAS 21391+5802, an intermediate-mass source embedded in the core of IC 1396N. Continuum observations from 3.6 cm to 1.2 mm are used to study the embedded objects and…

Astrophysics · Physics 2009-11-07 Maria T. Beltran , Jose M. Girart , Robert Estalella , Paul T. P. Ho , Aina Palau

New wide-field images of the Rho Ophiuchus molecular cloud at 850 and 450 microns obtained with SCUBA on the James Clerk Maxwell Telescope reveal a wide variety of large-scale features that were previously unknown. Two linear features each…

We present low spectral resolution molecular interferometric observations at 1.2 mm obtained with the Combined Array for Research in Millimetre-wave Astronomy (CARMA) towards the C-rich AGB star IRC+10216. We have mapped the emission of…

The low-mass star formation region associated with the reflection nebula Cederblad 110 in the Chamaeleon I cloud was mapped with the Australian Telescope Compact Array (ATCA) at 6 and 3.5cm. Altogether 11 sources were detected, three of…

Astrophysics · Physics 2011-05-23 K. Lehtinen , J. Harju , S. Kontinen , James L. Higdon

We present a detailed study of the massive star-forming region G35.2-0.74N with ALMA 1.3 mm multi-configuration observations. At 0.2" (440 au) resolution, the continuum emission reveals several dense cores along a filamentary structure,…

We present 1.05 mm ALMA observations of the deeply embedded high-mass protocluster G11.92-0.61, designed to search for low-mass cores within the accretion reservoir of the massive protostars. Our ALMA mosaic, which covers an extent of ~0.7…

Astrophysics of Galaxies · Physics 2017-05-10 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , R. Smith , J. M. D. Kruijssen , I. A. Bonnell , Q. Zhang

We present high-resolution L'-band imaging of the inner scattered light structure of Class 0 protostar L1527 IRS (IRAS 04368+2557) taken with the Gemini North telescope. The central point-source like feature seen in Spitzer Space Telescope…

Astrophysics of Galaxies · Physics 2015-05-19 John J. Tobin , Lee Hartmann , Laurent Loinard

We have conducted the first systematic study of Herbig Ae/Be stars using the technique of long baseline stellar interferometry in the near-infrared. The principal result of this paper is that the IOTA interferometer resolves the source of…

Astrophysics · Physics 2009-10-31 Rafael Millan-Gabet , F. Peter Schloerb , Wesley A. Traub

We present 1.3 millimeter observations of the debris disk surrounding the HR 8799 multi-planet system from the Submillimeter Array to complement archival ALMA observations that spatially filtered away the bulk of the emission. The image…

Earth and Planetary Astrophysics · Physics 2018-03-21 David J. Wilner , Meredith A. MacGregor , Sean M. Andrews , A. Meredith Hughes , Brenda Matthews , Kate Su

In their earliest stages, protostars accrete mass from their surrounding envelopes through circumstellar disks. Until now, the smallest observed protostar/envelope mass ratio was ~2.1. The protostar L1527 IRS is thought to be in the…

We present $K$-band spectra of the near infrared counterparts to IRS2E and IRS2W which is associated with the ultracompact HII region W51d, both of them embedded sources in the Galactic compact HII region W51 IRS2. The high spatial…

Astrophysics · Physics 2009-11-13 C. L. Barbosa , R. D. Blum , P. S. Conti , A. Damineli , E. Figueredo

We present K-band spectra of newly born OB stars in the obscured Galactic giant H II region W51A and ~ 0.8'' angular resolution images in the J, H and K_S-bands. Four objects have been spectroscopically classified as O-type stars. The mean…

Astrophysics · Physics 2009-11-13 E. Figueredo , R. D. Blum , A. Damineli , P. S. Conti , C. L. Barbosa

We present a CARMA 1.3 mm continuum survey toward 9 Class 0 protostars in the Perseus molecular cloud at $\sim$0.3$^{\prime\prime}$ (70 AU) resolution. This study approximately doubles the number of Class 0 protostars observed with spatial…

A multiwavelength investigation of the southern infrared dust bubble CS51 is presented in this paper. We probe the associated ionized, cold dust, molecular and stellar components. Radio continuum emission mapped at 610 and 1300 MHz, using…

Astrophysics of Galaxies · Physics 2017-09-11 Swagat Ranjan Das , Anandmayee Tej , Sarita Vig , Hong-Li Liu , Tie Liu , Swarna K. Ghosh , Ishwara Chandra C. H.

Molecular line observations that could resolve protoplanetary disks of ~100 AU both spatially and kinematically would be a useful tool to unambiguously identify these disks and to determine their kinematical and physical characteristics. In…

Astrophysics · Physics 2009-10-31 Jose F. Gomez , Paola D'Alessio