output
19962026
most citedPlanck 2013 results. XVI. Cosmological parameters

6.6k citations

Showing 2012 · astro-ph.SRShow all

24 papers · 2 filters

astro-ph.SR2012★ 254 cited

Spiral Arms in the Asymmetrically Illuminated Disk of MWC 758 and Constraints on Giant Planets

C. A. Grady, T. Muto, J. Hashimoto +71

We present the first near-IR scattered light detection of the transitional disk associated with the Herbig Ae star MWC 758 using data obtained as part of the Strategic Exploration…

astro-ph.SR2012★ 43 cited

ALMA and VLA observations of the outflows in IRAS 16293-2422

Laurent Loinard, Luis A. Zapata, Luis F. Rodriguez +10

We present ALMA and VLA observations of the molecular and ionized gas at 0.1-0.3 arcsec resolution in the Class 0 protostellar system IRAS 16293-2422. These data clarify the origin…

astro-ph.SR2012★ 204 cited

Direct Imaging Discovery of a `Super-Jupiter' Around the late B-Type Star Kappa And

J. Carson, C. Thalmann, M. Janson +52

We present the direct imaging discovery of an extrasolar planet, or possible low-mass brown dwarf, at a projected separation of 55 +/- 2 AU (1.058 +/- 0.007 arcsec) from the B9-typ…

astro-ph.SR2012★ 112 cited

Subaru Imaging of Asymmetric Features in a Transitional Disk in Upper Scorpius

S. Mayama, J. Hashimoto, T. Muto +52

We report high-resolution (0.07 arcsec) near-infrared polarized intensity images of the circumstellar disk around the star 2MASS J16042165-2130284 obtained with HiCIAO mounted on t…

astro-ph.SR2012★ 37 cited

A New Method of Determining the Characteristics of Evolved Binary Systems Revealed in the Observed Circumstellar Patterns: Application to AFGL 3068

Hyosun Kim, Ronald E. Taam

The binary characteristics of asymptotic giant branch (AGB) stars are imprinted in the asymmetric patterns of their circumstellar envelopes. We develop a simple method for constrai…

astro-ph.SR2012★ 25 cited

Substellar-Mass Condensations in Prestellar Cores

Fumitaka Nakamura, Shigehisa Takakuwa, Ryohei Kawabe

We present combined Submillimeter-Array (SMA) + single-dish images of the (sub)millimeter dust continuum emission toward two prestellar cores SM1 and B2-N5 in the nearest star clus…

astro-ph.SR2012★ 21 cited

RW Aur A from the X-Wind Point of View: General Features

Chun-Fan Liu, Hsien Shang

In this paper, the RW Aur A microjet is studied from the point of view of X-wind models. The archived HST/STIS spectra of optical forbidden lines [O I], [S II], and [N II] from RW…

astro-ph.SR2012★ 47 cited

Wide Binary Effects on Asymmetries in Asymptotic Giant Branch Circumstellar Envelopes

Hyosun Kim, Ronald E. Taam

Observations of increasingly higher spatial resolution reveal the existence of asymmetries in the circumstellar envelopes of a small fraction of asymptotic giant branch (AGB) stars…

astro-ph.SR2012★ 51 cited

On the metallicity dependence of crystalline silicates in oxygen-rich asymptotic giant branch stars and red supergiants

O. C. Jones, F. Kemper, B. A. Sargent +10

We investigate the occurrence of crystalline silicates in oxygen-rich evolved stars across a range of metallicities and mass-loss rates. It has been suggested that the crystalline…

astro-ph.SR2012★ 171 cited

Polarimetric Imaging of Large Cavity Structures in the Pre-transitional Protoplanetary Disk around PDS 70: Observations of the disk

Jun Hashimoto, Ruobing Dong, Tomoyuki Kudo +52

We present high resolution H-band polarized intensity (PI; FWHM = 0."1: 14 AU) and L'-band imaging data (FWHM = 0."11: 15 AU) of the circumstellar disk around the weak-lined T Taur…

astro-ph.SR2012★ 91 cited

Kinematics of the CO Gas in the Inner Regions of the TW Hya Disk

Katherine A. Rosenfeld, Chunhua Qi, Sean M. Andrews +7

We present a detailed analysis of the spatially and spectrally resolved 12CO J=2-1 and J=3-2 emission lines from the TW Hya circumstellar disk, based on science verification data f…

astro-ph.SR2012★ 50 cited

Intermediate Resolution Near-Infrared Spectroscopy of 36 late-M Dwarfs

R. Deshpande, E. L. Martín, M. M. Montgomery +8

We present observations of 36 late-M dwarfs obtained with the KeckII/NIRSPEC in the J-band at a resolution of \sim20,000. We have measured projected rotational velocities, absolute…

astro-ph.SR2012★ 75 cited

CID: Chemistry In Disks VII. First detection of HC3N in protoplanetary disks

E. Chapillon, A. Dutrey, S. Guilloteau +8

Molecular line emission from protoplanetary disks is a powerful tool to constrain their physical and chemical structure. Nevertheless, only a few molecules have been detected in di…

astro-ph.SR2012★ 36 cited

A 1-mm spectral line survey toward GLIMPSE Extended Green Objects (EGOs)

J. H. He, S. Takahashi, X. Chen

A northern subsample of 89 Spitzer GLIMPSE extended green objects (EGOs), the candidate massive young stellar objects, are surveyed for molecular lines in two 1-GHz ranges: 251.5-…

astro-ph.SR2012★ 67 cited

Fragmentation and OB Star Formation in High-Mass Molecular Hub-Filament System

Hauyu Baobab Liu, Izaskun Jiménez-Serra, Paul T. -P. Ho +3

Filamentary structures are ubiquitously seen in the interstellar medium. The concentrated molecular mass in the filaments allows fragmentation to occur in a shorter timescale than…

astro-ph.SR2012★ 40 cited

High-Resolution Near-Infrared Polarimetry of a Circumstellar Disk around UX Tau A

Ryoko Tanii, Yoichi Itoh, Tomoyuki Kudo +65

We present H-band polarimetric imagery of UX Tau A taken with HiCIAO/AO188 on the Subaru Telescope. UX Tau A has been classified as a pre-transitional disk object, with a gap struc…

astro-ph.SR2012★ 67 cited

Protostellar Accretion Flows Destabilized by Magnetic Flux Redistribution

Ruben Krasnopolsky, Zhi-Yun Li, Hsien Shang +1

Magnetic flux redistribution lies at the heart of the problem of star formation in dense cores of molecular clouds that are magnetized to a realistic level. If all of the magnetic…

astro-ph.SR2012★ 49 cited

High-Contrast NIR Polarization Imaging of MWC480

N. Kusakabe, C. A. Grady, M. L. Sitko +52

One of the key predictions of modeling from the IR excess of Herbig Ae stars is that for protoplanetary disks, where significant grain growth and settling has occurred, the dust di…

astro-ph.SR2012★ 30 cited

Polarization of thermal molecular lines in the envelope of IK Tau

W. H. T. Vlemmings, S. Ramstedt, R. Rao +1

Molecular line polarization is a unique source of information about the magnetic fields and anisotropies in the circumstellar envelopes of evolved stars. Here we present the first…

astro-ph.SR2012★ 34 cited

Near-Infrared H2 and Continuum Survey of Extended Green Objects

Hsu-Tai Lee, Michihiro Takami, Hao-Yuan Duan +5

The Spitzer GLIMPSE survey has revealed a number of "Extended Green Objects" (EGOs) which display extended emission at 4.5 micron. These EGOs are potential candidates for high mass…

astro-ph.SR2012★ 31 cited

An Analysis of the Rapidly Rotating Bp Star HD 133880

J. D. Bailey, J. Grunhut, M. Shultz +8

HD 133880 is a rapidly rotating Bp star and host to one of the strongest magnetic fields of any Bp star. A member of the Upper Centaurus Lupus association, it is a star with a well…

astro-ph.SR2012★ 29 cited

Thirty years of SN 1980K: Evidence for light echoes

Ben E. K. Sugerman, Jennifer E. Andrews, Michael J. Barlow +7

We report optical and mid-infrared photometry of SN 1980K between 2004 and 2010, which show slow monotonic fading consistent with previous spectroscopic and photometric observation…

astro-ph.SR2012★ 17 cited

Is FS Tau B Driving an Asymmetric Jet?

Chun-Fan Liu, Hsien Shang, Tae-Soo Pyo +6

FS Tau B is one of the few T Tauri stars that possess a jet and a counterjet as well as an optically-visible cavity wall. We obtained images and spectra of its jet-cavity system in…

astro-ph.SR2012★ 20 cited

Emission Mechanism of "Green Fuzzies" in High-mass Star Forming Regions

Michihiro Takami, How-Huan Chen, Jennifer L. Karr +3

The Infrared Array Camera (IRAC) on the Spitzer Space Telescope has revealed that a number of high-mass protostars are associated with extended mid-infrared emission, particularly…