A5088086488- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Molecular Spectroscopy and Structure
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Astrophysical Phenomena and Observations
- Superconducting and THz Device Technology
- Advanced Thermodynamic Systems and Engines
- Radio Astronomy Observations and Technology
- Phase Equilibria and Thermodynamics
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Advanced Chemical Physics Studies
- Solar and Space Plasma Dynamics
- Laser Design and Applications
- History and Developments in Astronomy
- Molecular Junctions and Nanostructures
- Impact of Light on Environment and Health
- solar cell performance optimization
Spanish National Observatory
2007-2023
Atacama Large Millimeter Submillimeter Array
2008-2015
Netherlands Institute for Radio Astronomy
2006-2013
Yebes Observatory
1989-2010
European Southern Observatory
2009
Leiden University
2008
Instituto Geográfico Nacional
1989-2007
Consejo Superior de Investigaciones Científicas
1999
Instituto Geográfico Nacional
1997
California Institute of Technology
1991
Aims. We investigate the fueling and feedback of star formation nuclear activity in NGC 1068, a nearby (D = 14 Mpc) Seyfert 2 barred galaxy, by analyzing distribution kinematics molecular gas disk. aim to understand if how accretion can self-regulate.
The observational study of star formation relations in galaxies is central to unraveling the physical processes at work on local and global scales. We wish expand sample extreme starbursts, represented by LIRGs ULIRGs, with high quality observations 1-0 line HCN. if a universal law can account for observed dense molecular gas normal forming starbursts. have used IRAM 30m telescope observe 19 lines CO, HCN HCO+. analysis new data proves that efficiency (SFE-dense) starbursts factor 3-4 higher...
Aims. We present a detailed analysis of Atacama Large Millimeter/submillimeter Array (ALMA) Bands 7 and 9 data CO, HCO+, HCN, CS, augmented with Plateau de Bure Interferometer (PdBI) the ~200 pc circumnuclear disc (CND) ~1.3 kpc starburst ring (SB ring) NGC 1068, nearby (D = 14 Mpc) Seyfert 2 barred galaxy. aim to determine physical characteristics dense gas in CND, establish whether different line intensity ratios we find within as well between CND SB ring, are due excitation effects (gas...
We present the results of first HCO+ survey probing dense molecular gas content a sample 16 luminous and ultraluminous infrared galaxies (LIRGs ULIRGs). Previous work, based on HCN(1-0) observations, had shown that LIRGs ULIRGs posses significantly higher fraction compared to normal galaxies. While picture issued from partly confirms this result, we have discovered an intriguing correlation between HCN(1-0)/HCO+(1-0) luminosity ratio IR galaxy (L(IR)). This trend casts doubts use HCN as...
We present new observations made with the IRAM 30 m telescope of and 3–2 lines HCN HCO+ used to probe dense molecular gas content in a sample 17 local luminous ultraluminous infrared galaxies (LIRGs ULIRGs). These have allowed us derive an updated version power law describing correlation between FIR luminosity HCN(1-0) high-redshift galaxies. first clear observational evidence that star formation efficiency , measured as ratio, is significantly higher LIRGs ULIRGs than normal galaxies,...
We report the detection of strong absorption by interstellar hydrogen fluoride along sight-line to submillimeter continuum source G10.6–0.4 (W31C). have used <i>Herschel<i/>'s HIFI instrument, in dual beam switch mode, observe 1232.4763 GHz <i>J<i/> = 1–0 HF transition upper sideband Band 5a receiver. The resultant spectrum shows weak emission from at LSR velocities range –10 –3 km s<sup>-1<sup/>, accompanied foreground material 15 50 s<sup>-1<sup/>. is similar that 1113.3430...
<i>Aims. <i/>Our goal is to investigate the properties of circumstellar disks around intermediate mass stars determine their occurrence, lifetime and evolution.<i>Methods. <i/>We completed a search for Herbig Be using NRAO Very Large Array (VLA) IRAM Plateau de Bure (PdB) interferometers. Thus far, we have observed 6 objects with 4 successful detections. The results towards 3 these (R Mon, MWC 1080, 137) were presented elsewhere. We present our new VLA PdBI data three 297, Z CMa, LKH<i>α<i/>...
We study the molecular content and star formation efficiency of 21 Blue Compact Dwarfs (BCDs). present CO(1-0) (2-1) observations, further supplemented with additional CO measurements multiwavelength ancillary data from literature. find luminosity to be correlated stellar HI masses, SFR tracers, size starburst its metallicity. BCDs appear offset Schmidt-Kennicutt (SK) law, showing extremely low ($\lesssim$0.1 Gyr) H2 H2+HI depletion timescales. The departure SK law is smaller when...
We have mapped the J = 1 → 0 line of SiO in a 1° × 12' (l b) region around Galactic center (GC) with an angular resolution 2' (~4 pc). In contrast to spatial distribution other high dipole moment molecules like CS, whose emission is nearly uniform, very fragmented, and it associated some molecular clouds only. particular, remarkable that follows closely nonthermal radio arc GC. The are more extended than beam, typical sizes between 4 20 pc. High (26'') mapping 2 toward Sgr B2 A shows...
view Abstract Citations (126) References (36) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS High-Resolution Aperture Synthesis of Molecular Gas in NGC 1068 Planesas, P. ; Scoville, N. Myers, S. T. We present high-resolution (2.9" ~ 260 pc) aperture synthesis imaging the CO J = 1 -> 0 line made with Owens Valley Millimeter Interferometer. The major features seen are (1) inner spiral arms molecular gas at 15" radius (1.5 kpc) which originate from ends central...
The HIFI instrument on board the Herschel Space Observatory has been used to observe interstellar nitrogen hydrides along sight-line towards G10.6-0.4 in order improve our understanding of chemistry nitrogen. We report observations absorption NH N=1-0, J=2-1 and ortho-NH2 1_1,1-0_0,0. also observed ortho-NH3 1_0-0_0, 2_0-1_0, para-NH3 2_1-1_1, searched unsuccessfully for NH+. All detections show emission associated directly with hot-core source itself as well by foreground material over a...
Spectra, taken with the heterodyne instrument, HIFI, aboard Herschel Space Observatory, of O-rich asymptotic giant branch (AGB) stars which form part guaranteed time key program HIFISTARS are presented. The aim this is to study dynamical structure, mass-loss driving mechanism, and chemistry outflows from AGB as a function chemical composition initial mass. We used HIFI instrument observe nine stars, mainly in H2O high rotational CO lines investigate correlation between line luminosity, ratio...
Context. Asymptotic giant branch (AGB) stars lose their envelopes by means of a stellar wind whose driving mechanism is not understood well. Characterizing the composition and thermal dynamical structure outflow provides constraints that are essential for understanding AGB evolution, including rate mass loss isotopic ratios.
We report the detection of ground-state rotational transition methylidyne cation CH<sup>+<sup/> and its isotopologue <sup>13<sup/>CH<sup>+<sup/> toward remote massive star-forming regions W33A, W49N, W51 with HIFI instrument onboard <i>Herschel<i/> satellite. Both lines are seen only in absorption against dust continuum emission regions. The is saturated over almost entire velocity ranges sampled by lines-of-sight that include gas associated (SFR) Galactic foreground material. column...
During their asymptotic giant branch, evolution low-mass stars lose a significant fraction of mass through an intense wind, enriching the interstellar medium with products nucleosynthesis. We observed nearby oxygen-rich branch star IK Tau using high-resolution HIFI spectrometer onboard Herschel. report on first detection H_2^{16}O and rarer isotopologues H_2^{17}O H_2^{18}O in both ortho para states. deduce total water content (relative to molecular hydrogen) 6.6x10^{-5}, ortho-to-para ratio...
Millimetron is a Russian-led 12 m diameter submillimeter and far-infrared space observatory which included in the Space Plan of Russian Federation for launch around 2017. With its large collecting area state-of-the-art receivers, it will enable unique science allow at least one order magnitude improvement with respect to Herschel Observatory. be operated two basic observing modes: as single-dish observatory, an element ground-space very long baseline interferometry (VLBI) system. As...
We analyze new high spatial resolution (~60 pc) ALMA CO(2-1) observations of the isolated luminous infrared galaxy ESO 320-G030 (d=48 Mpc) in combination with ancillary HST optical and near-IR imaging as well VLT/SINFONI integral field spectroscopy. detect a high-velocity (~450 km/s) spatially resolved (size~2.5 kpc; dynamical time ~3 Myr) massive (~10^7 Msun; mass rate~2-8 Msun/yr) molecular outflow originated central ~250 pc. observe clumpy structure outflowing cold gas clump sizes between...