A. Kaminski
A5045118175- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Gamma-ray bursts and supernovae
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Astrophysical Phenomena and Observations
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Scientific Measurement and Uncertainty Evaluation
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- Molecular spectroscopy and chirality
- Inertial Sensor and Navigation
- Field-Flow Fractionation Techniques
- Advanced Chemical Physics Studies
- Face recognition and analysis
- Experimental and Theoretical Physics Studies
- Spectroscopy and Chemometric Analyses
- Biometric Identification and Security
- Chemical Reactions and Isotopes
Royal Observatory
2024
Heidelberg University
2010-2024
UK Astronomy Technology Centre
2024
Max Planck Institute for Astronomy
2010-2018
Federal Foreign Office
2012
Adam Mickiewicz University in Poznań
2009
Context: The CARMENES survey is a high-precision radial velocity (RV) programme that aims to detect Earth-like planets orbiting low-mass stars. Aims: We develop least-squares fitting algorithms derive the RVs and additional spectral diagnostics implemented in SpEctrum Radial Velocity Analyser (SERVAL), publicly available python code. Methods: measured using high signal-to-noise templates created by coadding all spectra of each star.We define chromatic index as RV gradient function wavelength...
The CARMENES radial velocity (RV) survey is observing 324 M dwarfs to search for any orbiting planets. In this paper, we present the sample by publishing one spectrum each dwarf. These spectra cover wavelength range 520--1710nm at a resolution of least $R > 80,000$, and measure its RV, H$\alpha$ emission, projected rotation velocity. We an atlas high-resolution M-dwarf compare atmospheric models. To quantify RV precision that can be achieved in low-mass stars over range, analyze our...
Context. The HARPS spectrograph provides state-of-the-art stellar radial velocity (RV) measurements with a precision down to 1 m/s. spectra are extracted dedicated data-reduction software (DRS) and the RVs computed by CCF numerical mask. Aims. aim of this study is three-fold: (i) Create easy access public RV data set. (ii) Apply new SERVAL pipeline spectra, produce more precise (iii) Check whether can be further improved correcting for small nightly systematic effects. Methods. For each star...
The CARMENES exoplanet survey of M dwarfs has obtained more than 18 000 spectra 329 nearby over the past five years as part its guaranteed time observations (GTO) program. We determine planet occurrence rates with 71 stars from GTO program for which we have 50 observations. use injection-and-retrieval experiments on radial-velocity (RV) series to measure detection probabilities. include 27 planets in 21 planetary systems our analysis. find 0.06+0.04-0.03 giant (100 M_Earth < M_pl sin i 1000...
We present three transit observations of HD 189733 b obtained with the high-resolution spectrograph CARMENES at Calar Alto. A strong absorption signal is detected in near-infrared He I triplet 10830 Å all transits. During mid-transit, mean level $0.88\pm0.04$ % measured a $\pm$10 km s$^{-1}$ range net blueshift $-3.5\pm0.4$ (10829.84--10830.57 Å). The exhibits radial velocities $+6.5\pm3.1$ and $-12.6\pm1.0$ during ingress egress, respectively; planetary rest frame. show that stellar...
Context. Teegarden's Star is the brightest and one of nearest ultra-cool dwarfs in solar neighbourhood. For its late spectral type (M7.0V), star shows relatively little activity a prime target for near-infrared radial velocity surveys such as CARMENES. Aims. As part CARMENES search exoplanets around M dwarfs, we obtained more than 200 radial-velocity measurements analysed them planetary signals. Methods. We find periodic variability velocities Star. also studied photometric to rule out...
Context: The main goal of the CARMENES survey is to find Earth-mass planets around nearby M-dwarf stars. Seven M-dwarfs included in sample had been observed before with HIRES and HARPS either were reported have one short period planetary companion (GJ15A, GJ176, GJ436, GJ536 GJ1148) or are multiple systems (GJ581 GJ876). Aims: We aim report new precise optical radial velocity measurements for these planet hosts test overall capabilities CARMENES. Methods: combined our Doppler those available...
We report the detection of a transiting Earth-size planet around GJ 357, nearby M2.5 V star, using data from Transiting Exoplanet Survey Satellite (TESS). 357 b (TOI-562.01) is transiting, hot, Earth-sized ( T eq = 525 ± 11 K) with radius R 1.217 0.084 ⊕ and an orbital period P 3.93 d. Precise stellar radial velocities CARMENES PFS, as well archival HIRES, UVES, HARPS also display 3.93-day periodicity, confirming planetary nature leading to mass M 1.84 0.31 . In addition velocity signal for...
The CARMENES instrument is a pair of high-resolution (R⪆80,000) spectrographs covering the wavelength range from 0.52 to 1.71 μm, optimized for precise radial velocity measurements. It was installed and commissioned at 3.5m telescope Calar Alto observatory in Southern Spain 2015. first large science program survey ~ 300 M dwarfs, which started on Jan 1, 2016. We present an overview all subsystems (front end, fiber system, visible-light spectrograph, near-infrared calibration units, etalons,...
Context: Recently, the He I triplet at 10830 \r{A} has been rediscovered as an excellent probe of extended and possibly evaporating atmospheres close-in transiting planets. This already resulted in detections this a handful planets, both from space ground. However, while strong signal is expected for hot Jupiter HD 209458 b, only upper limits have obtained so far. Aims: Our goal to measure helium excess absorption b assess atmosphere planet possible evaporation. Methods: We new...
M dwarfs are known to generate the strongest magnetic fields among main-sequence stars with convective envelopes, but link between and underlying dynamo mechanisms, rotation, activity still lacks a consistent picture. In this work we measure from high-resolution near-infrared spectra taken CARMENES radial-velocity planet survey in sample of 29 active compare our results against stellar parameters. We use state-of-the-art radiative transfer code total flux densities Zeeman broadening spectral...
Context. The Calar Alto high-Resolution search for M dwarfs with Exo-earths Near-infrared and optical Echelle Spectrographs (CARMENES) survey is searching Earth-like planets orbiting using the radial velocity method. Studying stellar activity of target stars important to avoid false planet detections improve our understanding atmospheres late-type stars. Aims. In this work we present measurements indicators at visible near-infrared wavelengths 331 observed CARMENES. Our aim identify that are...
We present precise photospheric parameters of 282 M dwarfs determined from fitting the most recent version PHOENIX models to high-resolution CARMENES spectra in visible (0.52 - 0.96 $\mu$m) and near-infrared wavelength range (0.96 1.71 $\mu$m). With its aim search for habitable planets around dwarfs, several different masses have been detected. The characterization target sample is important ability derive constrain physical properties any planetary systems that are As a continuation...
For years, the standard procedure to measure radial velocities (RVs) of spectral observations consisted in cross-correlating spectra with a binary mask, that is, simple stellar template contains information on position and strength absorption lines. The cross-correlation function (CCF) profiles also provide several indicators activity. We present methodology first build weighted masks and, second, compute CCF these from which we derive activity indicators. These methods are implemented...
We determined effective temperatures, surface gravities, and metallicities for a sample of 343 M dwarfs observed with CARMENES, the double-channel, high-resolution spectrograph installed at 3.5 m telescope Calar Alto Observatory. employed S TE P AR YN , Bayesian spectral synthesis implementation particularly designed to infer stellar atmospheric parameters late-type stars following Markov chain Monte Carlo approach. made use BT-Settl model atmospheres radiative transfer code turbospectrum...
The CARMENES instrument was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability search for temperate rocky planets around a sample of nearby cool stars. broad wavelength coverage designed provide range stellar activity indicators assess the nature potential RV signals and valuable spectral information help characterise targets. Data Release 1 (DR1) makes public all observations obtained during guaranteed time observations, which ran from 2016 2020...
The He I λ 10833 Å triplet is a powerful tool for characterising the upper atmosphere of exoplanets and tracing possible mass loss. Here, we analysed one transit GJ 1214 b observed with CARMENES high-resolution spectrograph to study its via transmission spectroscopy around triplet. Although previous studies using lower resolution instruments have reported non-detections in b, report here first potential detection. We reconcile conflicting results arguing that observations did not present...