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High resolution observations of the asteroids Iris and Juno have been performed by means of the UVES spectrograph at the ESO VLT to obtain the effective accurac y of the spectrograph's radial velocity. The knowledge of this quantity has…

Astrophysics · Physics 2009-11-13 P. Molaro , S. A. Levshakov , S. Monai , M. Centurion , P. Bonifacio , S. D'Odorico , L. Monaco

We present the second release of value-added catalogues of the LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC DR2). The catalogues present values of radial velocity $V_{\rm r}$, atmospheric parameters --- effective…

We present new radial velocity measurements of 13 selected intermediate mass stars (2 - 6 M$_\odot$). The measurements were performed between 29 April and 6 September 2024 at the University Observatory Jena using the \'echelle spectrograph…

Solar and Stellar Astrophysics · Physics 2025-10-14 J. Bätz , M. Mugrauer , K. -U. Michel , J. Reichert , A. Tschirschky , L. Pietsch , F. Edelmann , R. Neuhäuser

Context: Future astrometric missions such as SIM PlanetQuest need very stable reference stars. K giants have large luminosities, which place them at large distances and thus the jitter of their photocenters by companions is relatively…

We provide APASS photometry in the Landolt BV and Sloan g'r'i' bands for all the 425,743 stars included in the latest 4th RAVE Data Release. The internal accuracy of the APASS photometry of RAVE stars, expressed as error of the mean of data…

The SEGUE survey obtained 240,000 moderate resolution (R = 1800) spectra from 3900 - 9000 Angstroms of fainter Milky Way stars (14.0 < g < 20.3) of a wide variety of spectral types, both main sequence and evolved objects, with the goal of…

Astrophysics of Galaxies · Physics 2012-08-27 II SEGUE Collaboration , Brian Yanny , Constance Rockosi , Heidi Jo Newberg , Gillian R. Knapp

We present preliminary results of the first and on-going radial velocity survey for circumbinary planets. With a novel radial velocity technique employing an iodine absorption cell we achieve an unprecedented RV precision of up to 2 m/s for…

Earth and Planetary Astrophysics · Physics 2015-05-14 Maciej Konacki , Matthew W. Muterspaugh , Shrinivas R. Kulkarni , Krzysztof G. Hełminiak

Context. Radial velocities (RVs) of stars contain both the Doppler reflex motion of potential planetary companions and the drowning and sometimes imitating effect of stellar activity. To separate the two, previous efforts have sought for…

Solar and Stellar Astrophysics · Physics 2023-12-19 K. Al Moulla , X. Dumusque , M. Cretignier

We apply the twin method to determine parallaxes to 232,545 stars of the RAVE survey using the parallaxes of Gaia DR1 as a reference. To search for twins in this large dataset, we apply the t-stochastic neighbour embedding t-SNE projection…

The purpose of this research note is to present a reliable list of clean spectral lines in the Calcium Triplet region at medium resolution ~7500, for chemical abundance analysis, in the framework of the RAdial Velocity Experiment (RAVE).…

Solar and Stellar Astrophysics · Physics 2018-11-16 Guillaume Guiglion , Cristina Chiappini , Marica Valentini , Matthias Steinmetz

Most of known RR Lyraes are type ab RR Lyraes (RRLab), and they are the excellent tool to map the Milky Way and its substructures. We find that 1148 RRLab stars determined by Drake et al.(2013) have been observed by spectroscopic surveys of…

Astrophysics of Galaxies · Physics 2018-03-28 Iminhaji Ablimit , Gang Zhao

The fields chosen for the first observations of the cosmic microwave background with the Very Small Array have been surveyed with the Ryle Telescope at 15 GHz. We have covered three regions around RA 00h20m Dec +30deg, RA 09h40m Dec +32deg…

Based on high-resolution UVES spectra we found that the radial velocity (RV) dispersion of nine of twelve known young bona fide and candidate brown dwarfs in the Cha I dark cloud is 2.0 km/s, i.e. significantly smaller than the RV…

Astrophysics · Physics 2009-11-07 V. Joergens , E. W. Guenther

The RICE experiment seeks observation of ultra-high energy (UHE; >100 PeV) neutrinos interacting in Antarctic ice, by measurement of the radiowavelength Cherenkov radiation resulting from the collision of a neutrino with an ice molecule.…

High Energy Astrophysical Phenomena · Physics 2013-05-30 Ilya Kravchenko , Dave Seckel , Dave Besson , John Ralston , John Taylor , Ken Ratzlaff , Rob Young

Radial velocity (RV) detection of planets is hampered by astrophysical processes on the surfaces of stars that induce a stochastic signal, or "jitter", which can drown out or even mimic planetary signals. Here, we empirically and carefully…

Earth and Planetary Astrophysics · Physics 2020-04-30 Jacob K. Luhn , Jason T. Wright , Andrew W. Howard , Howard Isaacson

The population of radio-loud stars has to date been studied primarily through either targeted observations of a small number of highly active stars or widefield, single-epoch surveys that cannot easily distinguish stellar emission from…

Solar and Stellar Astrophysics · Physics 2023-12-19 Joshua Pritchard , Tara Murphy , George Heald , Michael S. Wheatland , David L. Kaplan , Emil Lenc , Andrew O'Brien , Ziteng Wang

We present high-resolution near-infrared spectra, obtained with the NIRSPEC spectrograph on the W. M. Keck II Telescope, of a collection of hot, massive stars within the central 25 arcseconds of the Galactic center. We have identified a…

The first HIRES/Keck precision radial velocity (RV) catalog was released in 2017; it was followed by a second release in 2019, which incorporated corrections for small but significant systematic errors. The manifestation of stellar activity…

Earth and Planetary Astrophysics · Physics 2025-09-09 Jerusalem T. Teklu , Volker Perdelwitz , R. Paul Butler , Trifon Trifonov , Steven S. Vogt , Deepa Mukhija , Lev Tal-Or

We present analysis of precision radial velocities (RV) of 1134 mostly red giant stars in the southern sky, selected as candidate astrometric grid objects for the Space Interferometry Mission (SIM). Only a few (typically, 2 or 3)…

Solar and Stellar Astrophysics · Physics 2015-06-23 Valeri V. Makarov , Stephen C. Unwin

Previous simulations predicted the activity-induced radial-velocity (RV) variations of M dwarfs to range from $\sim1$ cm/s to $\sim1$ km/s, depending on various stellar and activity parameters. We investigate the observed relations between…