Search Publications
First stellar spectroscopy in Leo P
Lennon, D. J.; Bastian, N.; Cioni, M. -R. L. +11 more
We present the first stellar spectroscopy in the low-luminosity (MV ∼ -9.3 mag), dwarf galaxy Leo P. Its significantly low oxygen abundance (3% solar) and relative proximity (∼1.6 Mpc) make it a unique galaxy in which to investigate the properties of massive stars with near-primordial compositions akin to those in the early Universe. Fr…
Molecular tracers of radiative feedback in Orion (OMC-1). Widespread CH+ (J = 1-0), CO (10-9), HCN (6-5), and HCO+ (6-5) emission
Cernicharo, José; Bron, Emeric; Goicoechea, Javier R. +4 more
Young massive stars regulate the physical conditions, ionization, and fate of their natal molecular cloud and surroundings. It is important to find tracers that quantify the stellar feedback processes that take place on different spatial scales. We present 85 arcmin2 velocity-resolved maps of several submillimeter molecular lines, taken…
HD 219666 b: a hot-Neptune from TESS Sector 1
Alonso, R.; Bouchy, F.; Deeg, H. +73 more
We report on the confirmation and mass determination of a transiting planet orbiting the old and inactive G7 dwarf star HD 219666 (M⋆ = 0.92 ± 0.03 M⊙, R⋆ = 1.03 ± 0.03 R⊙, τ⋆ = 10 ± 2 Gyr). With a mass of Mb = 16.6 ± 1.3 M⊕, a radius of Rb = 4.71 ± 0.17 R…
Black hole mass estimates in quasars. A comparative analysis of high- and low-ionization lines
Bon, E.; Marziani, P.; Bon, N. +7 more
Context. The inter-line comparison between high- and low-ionization emission lines has yielded a wealth of information on the structure and dynamics of the quasar broad line region (BLR), including perhaps the earliest unambiguous evidence in favor of a disk + wind structure in radio-quiet quasars.
Aims: We carried out an analysis of the C IV…
Multi-wavelength de-blended Herschel view of the statistical properties of dusty star-forming galaxies across cosmic time
Béthermin, M.; Wang, L.; Michałowski, M. J. +5 more
Aims: We study the statistical properties of dusty star-forming galaxies across cosmic time, such as their number counts, luminosity functions (LF), and the dust-obscured star formation rate density (SFRD).
Methods: We used the most recent de-blended Herschel catalogue in the COSMOS field to measure the number counts and LFs at far-infra…
HDO and SO2 thermal mapping on Venus. IV. Statistical analysis of the SO2 plumes
Encrenaz, T.; Atreya, S. K.; Bézard, B. +10 more
Since January 2012 we have been monitoring the behavior of sulfur dioxide and water on Venus, using the Texas Echelon Cross-Echelle Spectrograph (TEXES) imaging spectrometer at the NASA InfraRed Telescope Facility (IRTF, Mauna Kea Observatory). We present here the observations obtained between January 2016 and September 2018. As in the case of our…
CHANG-ES. XIII. Transport processes and the magnetic fields of NGC 4666: indication of a reversing disk magnetic field
Weżgowiec, M.; Soida, M.; Dettmar, R. -J. +10 more
Context. The observation of total and linearly polarized synchrotron radiation of spiral galaxies in the radio continuum reveals the distribution and structure of their magnetic fields. By observing these, information about the proposed dynamo processes that preserve the large-scale magnetic fields in spiral galaxies can be gained. Additionally, b…
Four GRB supernovae at redshifts between 0.4 and 0.8. The bursts GRB 071112C, 111228A, 120714B, and 130831A
Greiner, J.; Klose, S.; Schady, P. +15 more
Twenty years ago, GRB 980425/SN 1998bw revealed that long gamma-ray bursts (GRBs) are physically associated with broad-lined type-Ic supernovae (SNe). Since then more than 1000 long GRBs have been localized to high angular precision, but only in ∼50 cases has the underlying SN component been identified. Using the Gamma-Ray Burst Optical Near-Infra…
Gaia DR2 distances to Collinder 419 and NGC 2264 and new astrometric orbits for HD 193 322 Aa,Ab and 15 Mon Aa,Ab
Maíz Apellániz, J.
Context. On the one hand, the second data release of the Gaia mission (Gaia DR2) has opened a trove of astrometric and photometric data for Galactic clusters within a few kiloparsecs of the Sun. On the other hand, lucky imaging has been an operational technique to measure the relative positions of visual binary systems for a decade and a half. Thi…
CO observations of major merger pairs at z = 0: molecular gas mass and star formation
Yun, Min S.; Gao, Yu; Domingue, Donovan L. +4 more
We present CO observations of 78 spiral galaxies in local merger pairs. These galaxies represent a subsample of a Ks-band-selected sample consisting of 88 close major-merger pairs (HKPAIRs), 44 spiral-spiral (S+S) pairs, and 44 spiral-elliptical (S+E) pairs, with separation <20 h-1 kpc and mass ratio <2.5. For all objec…