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most citedThe Gaia mission

7.1k citations

Showing 2019 · astro-ph.EPShow all

25 papers · 2 filters

astro-ph.EP2019★ 10 cited

XO-7 b: A transiting hot Jupiter with a massive companion on a wide orbit

Nicolas Crouzet, Brian F. Healy, Guillaume Hébrard +16

Transiting planets orbiting bright stars are the most favorable targets for follow-up and characterization. We report the discovery of the transiting hot Jupiter XO-7 b and of a se…

astro-ph.EP2019★ 41 cited

Decoding the radial velocity variations of HD41248 with ESPRESSO

J. P. Faria, V. Adibekyan, E. M. Amazo-Gómez +13

Twenty-four years after the discoveries of the first exoplanets, the radial-velocity (RV) method is still one of the most productive techniques to detect and confirm exoplanets. Bu…

astro-ph.EP2019★ 26 cited

TESS Reveals HD 118203 b to be a Transiting Planet

Joshua Pepper, Stephen R. Kane, Joseph E. Rodriguez +30

The exoplanet HD 118203 b, orbiting a bright (V = 8.05) host star, was discovered using the radial velocity method by da Silva et al. (2006), but was not previously known to transi…

astro-ph.EP2019★ 51 cited

The SOPHIE search for northern extrasolar planets. XVI. HD 158259: A compact planetary system in a near-3:2 mean motion resonance chain

N. C. Hara, F. Bouchy, M. Stalport +32

Since 2011, the SOPHIE spectrograph has been used to search for Neptunes and super-Earths in the Northern Hemisphere. As part of this observational program, 290 radial velocity mea…

astro-ph.EP2019★ 23 cited

K2-19b and c are in a 3:2 Commensurability but out of Resonance: A Challenge to Planet Assembly by Convergent Migration

Erik A. Petigura, John Livingston, Konstantin Batygin +11

K2-19b and c were among the first planets discovered by NASA's K2 mission and together stand in stark contrast with the physical and orbital properties of the solar system planets.…

astro-ph.EP2019★ 47 cited

Exoplanet characterisation in the longest known resonant chain: the K2-138 system seen by HARPS

T. A. Lopez, S. C. C. Barros, A. Santerne +36

The detection of low-mass transiting exoplanets in multiple systems brings new constraints to planetary formation and evolution processes and challenges the current planet formatio…

astro-ph.EP2019★ 27 cited

Beyond the exoplanet mass-radius relation

S. Ulmer-Moll, N. C. Santos, P. Figueira +2

Mass and radius are two fundamental properties for characterising exoplanets, but only for a relatively small fraction of exoplanets are they both available. Mass is often derived…

astro-ph.EP2019★ 63 cited

Catalog for the ESPRESSO blind radial velocity exoplanet survey

S. Hojjatpanah, P. Figueira, N. C. Santos +19

One of the main scientific drivers for ESPRESSO,Échelle SPectrograph, is the detection and characterization of Earth-class exoplanets. With this goal in mind, the ESPRESSO Guarante…

astro-ph.EP2019★ 98 cited

Three Red Suns in the Sky: A Transiting, Terrestrial Planet in a Triple M Dwarf System at 6.9 Parsecs

Jennifer G. Winters, Amber A. Medina, Jonathan M. Irwin +40

We present the discovery from TESS data of LTT 1445Ab. At a distance of 6.9 parsecs, it is the second nearest transiting exoplanet system found to date, and the closest one known f…

astro-ph.EP2019★ 475 cited

Two accreting protoplanets around the young star PDS 70

S. Y. Haffert, A. J. Bohn, J. de Boer +5

Newly forming proto-planets are expected to create cavities and substructures in young, gas-rich proto-planetary disks, but they are difficult to detect as they could be confused w…

astro-ph.EP2019★ 77 cited

Characterization of the L 98-59 multi-planetary system with HARPS: two confirmed terrestrial planets and a mass upper limit on the third

R. Cloutier, N. Astudillo-Defru, X. Bonfils +33

L 98-59 (TIC 307210830, TOI-175) is a nearby M3 dwarf around which TESS revealed three terrestrial-sized transiting planets (0.80, 1.35, 1.57 Earth radii) in a compact configuratio…

astro-ph.EP2019★ 46 cited

The CORALIE survey for southern extrasolar planets XVIII. Three new massive planets and two low mass brown dwarfs at separation larger than 5 AU

E. L. Rickman, D. Ségransan, M. Marmier +36

Context. Since 1998, a planet-search around main sequence stars within 50~pc in the southern hemisphere has been carried out with the CORALIE spectrograph at La Silla Observatory.…

astro-ph.EP2019★ 155 cited

First direct detection of an exoplanet by optical interferometry; Astrometry and K-band spectroscopy of HR8799 e

S. Lacour, M. Nowak, J. Wang +85

To date, infrared interferometry at best achieved contrast ratios of a few times on bright targets. GRAVITY, with its dual-field mode, is now capable of high contrast obs…

astro-ph.EP2019★ 47 cited

The SOPHIE search for northern extrasolar planets. XIV. A temperate ( K) super-earth around the nearby star Gliese 411

R. F. Díaz, X. Delfosse, M. J. Hobson +33

Periodic radial velocity variations in the nearby M-dwarf star Gl411 are reported, based on measurements with the SOPHIE spectrograph. Current data do not allow us to distinguish b…

astro-ph.EP2019★ 26 cited

The Metallicity-Period-Mass Diagram of low-mass exoplanets

S. G. Sousa, V. Adibekyan, N. C. Santos +14

The number of exoplanet detections continues to grow following the development of better instruments and missions. Key steps for the understanding of these worlds comes from their…

astro-ph.EP2019★ 34 cited

The Curious Case of KOI 4: Confirming Kepler's First Exoplanet

Ashley Chontos, Daniel Huber, David W. Latham +13

The discovery of thousands of planetary systems by Kepler has demonstrated that planets are ubiquitous. However, a major challenge has been the confirmation of Kepler planet candid…

astro-ph.EP2019★ 66 cited

HD 213885b: A transiting 1-day-period super-Earth with an Earth-like composition around a bright () star unveiled by TESS

Néstor Espinoza, Rafael Brahm, Thomas Henning +60

We report the discovery of the 1.008-day, ultra-short period (USP) super-Earth HD 213885b (TOI-141b) orbiting the bright () star HD 213885 (TOI-141, TIC 403224672), detected…

astro-ph.EP2019★ 52 cited

Hot, rocky and warm, puffy super-Earths orbiting TOI-402 (HD 15337)

X. Dumusque, O. Turner, C. Dorn +30

TESS is revolutionising the search for planets orbiting bright and nearby stars. In sectors 3 and 4, TESS observed TOI-402 (TIC-120896927), a bright V=9.1 K1 dwarf also known as HD…

astro-ph.EP2019★ 23 cited

The SOPHIE search for northern extrasolar planets XV. A Warm Neptune around the M-dwarf Gl378

M. J. Hobson, X. Delfosse, N. Astudillo-Defru +31

We present the detection of a Warm Neptune orbiting the M-dwarf Gl378, using radial velocity measurements obtained with the SOPHIE spectrograph at the Observatoire de Haute-Provenc…

astro-ph.EP2019★ 18 cited

K2-291 b: A rocky super-Earth in a 2.2 day orbit

Molly R. Kosiarek, Sarah Blunt, Mercedes Lopez-Morales +43

K2-291 (EPIC 247418783) is a solar-type star with a radius of R_star = 0.899 0.034 R_sun and mass of M_star=0.934 0.038 M_sun. From K2 C13 data, we found one super-Eart…

astro-ph.EP2019★ 88 cited

Heavy metal rules. I. Exoplanet incidence and metallicity

Vardan Adibekyan

Discovery of only handful of exoplanets required to establish a correlation between giant planet occurrence and metallicity of their host stars. More than 20 years have already pas…

astro-ph.EP2019★ 17 cited

So close, so different: characterization of the K2-36 planetary system with HARPS-N

M. Damasso, L. Zeng, L. Malavolta +19

K2-36 is a K dwarf orbited by two small ( and ), close-in (=0.022 AU and =0.054 AU) transiti…

astro-ph.EP2019★ 118 cited

A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system

Aldo S. Bonomo, Li Zeng, Mario Damasso +49

Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii () range from low-density sub-Neptunes containing volatile element…

astro-ph.EP2019★ 50 cited

Masses and radii for the three super-Earths orbiting GJ 9827, and implications for the composition of small exoplanets

K. Rice, L. Malavolta, A. Mayo +34

Super-Earths belong to a class of planet not found in the Solar System, but which appear common in the Galaxy. Given that some super-Earths are rocky, while others retain substanti…