output
20002026
most citedSeven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1

1.6k citations

Showing 2012 · astro-ph.GAShow all

10 papers · 2 filters

astro-ph.GA2012★ 161 cited

The thermal state of molecular clouds in the Galactic Center: evidence for non-photon-driven heating

Y. Ao, C. Henkel, K. M. Menten +6

We used the Atacama Pathfinder Experiment (APEX) 12 m telescope to observe the J_KaKc=3_03-2_02, 3_22-2_21, and 3_21-2_20 transitions of para-H_2CO at 218 GHz simultaneously to det…

astro-ph.GA2012★ 11 cited

A one-sided knot ejection at the core of the HH 111 outflow

L. Gomez, L. F. Rodriguez, L. Loinard

We present an astrometry study of the radio source VLA 1 at the core of the HH 111 outflow using new data (2007) as well as archival observations (1992-1996). All data were taken a…

astro-ph.GA2012★ 23 cited

Ammonia in the hot core W51-IRS2: 12 new maser lines and a maser component with a velocity drift

C. Henkel, T. L. Wilson, H. Asiri +1

With the 100-m telescope at Effelsberg, 19 ammonia (NH3) maser lines have been detected toward the prominent massive star forming region W51-IRS2. Eleven of these inversion lines,…

astro-ph.GA2012★ 14 cited

ALMA and VLA observations of recombination lines and continuum toward the Becklin-Neugebauer object in Orion

Roberto Galvan-Madrid, Ciriaco Goddi, Luis F. Rodriguez

Compared to their centimeter-wavelength counterparts, millimeter recombination lines (RLs) are intrinsically brighter and are free of pressure broadening. We report observations of…

astro-ph.GA2012★ 37 cited

Dense Gas in M33 (HerM33es)

C. Buchbender, C. Kramer, M. Gonzalez-Garcia +13

We aim to better understand the emission of molecular tracers of the diffuse and dense gas in giant molecular clouds and the influence that metallicity, optical extinction, density…

astro-ph.GA2012★ 11 cited

Disentangling the circumnuclear environs of Centaurus A: Gaseous Spiral Arms in a Giant Elliptical Galaxy

D. Espada, S. Matsushita, A. B. Peck +3

We report the existence of spiral arms in the recently formed gaseous and dusty disk of the closest giant elliptical, NGC 5128 (Centaurus A), using high resolution 12CO(2-1) observ…

astro-ph.GA2012★ 42 cited

The velocity dispersion and mass function of the outer halo globular cluster Palomar 4

Matthias J. Frank, Michael Hilker, Holger Baumgardt +5

We obtained precise line-of-sight radial velocities of 23 member stars of the remote halo globular cluster Palomar 4 (Pal 4) using the High Resolution Echelle Spectrograph (HIRES)…

astro-ph.GA2012★ 26 cited

The Resolved Stellar Population in 50 Regions of M83 from HST/WFC3 Early Release Science Observations

Hwihyun Kim, Bradley C. Whitmore, Rupali Chandar +22

We present a multi-wavelength photometric study of ~15,000 resolved stars in the nearby spiral galaxy M83 (NGC5236, D=4.61Mpc) based on Hubble Space Telescope Wide Field Camera 3 o…

astro-ph.GA2012★ 216 cited

Resolving the electron temperature discrepancies in HII Regions and Planetary Nebulae: kappa-distributed electrons

David C. Nicholls, Michael A. Dopita, Ralph S. Sutherland

The measurement of electron temperatures and metallicities in H ii regions and Planetary Nebulae (PNe) has-for several decades-presented a problem: results obtained using different…

astro-ph.GA2012★ 48 cited

Local stellar kinematics from RAVE data: III. Radial and Vertical Metallicity Gradients based on Red Clump Stars

S. Bilir, S. Karaali, S. Ak +5

We investigate radial and vertical metallicity gradients for a sample of red clump stars from the RAdial Velocity Experiment (RAVE) Data Release 3. We select a total of 6781 stars,…