- ID:
- ivo://CDS.VizieR/J/A+A/610/A63
- Title:
- WASP-151b, WASP-153b, WASP-156b
- Short Name:
- J/A+A/610/A63
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of three transiting exoplanets by the SuperWASP survey and the SOPHIE spectrograph with mass and radius determined with a precision better than 15%. WASP-151b and WASP-153b are two hot Saturns with masses, radii, densities and equilibrium temperatures of 0.31^+0.04^_-0.03_M_J_, 1.13^+0.03^_-0.03_R_J_, 0.22^+0.03^_-0.02_rho_J_ and 1,290^+20^_-10_K, and 0.39^+0.02^_-0.02_M_J_, 1.55^+0.10^_-0.08_R_J_, 0.11^+0.02^_-0.02{rho}_J_ and 1,700^+40^ _-40_K, respectively. Their host stars are early G type stars (with magV ~ 13) and their orbital periods are 4.53 and 3.33 days, respectively. WASP-156b is a Super-Neptune orbiting a K type star (magV = 11.6). It has a mass of 0.128^+0.010^_-0.009_M_J_, a radius of 0.51^+0.02^_ -0.02 R_J_, a density of 1.0^+0.1^_-0.1_{rho}_J_, an equilibrium temperature of 970^+30^_-20_K and an orbital period of 3.83 days.
« Previous |
231 - 237 of 237
|
Next »
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/563/A143
- Title:
- WASP-68b, WASP-73b, WASP-88b transits
- Short Name:
- J/A+A/563/A143
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery by the WASP transit survey of three new hot Jupiters, WASP-68 b, WASP-73 b and WASP-88 b. WASP-68 b has a mass of 0.95+/-0.03M_Jup_, a radius of 1.24_-0.06_^+0.10^R_Jup_, and orbits a V=10.7 G0-type star (1.24+/-0.03M_{sun}_, 1.69_-0.06_^+0.11^R_{sun}_, Teff=5911+/-60K) with a period of 5.084298+/-0.000015-days. Its size is typical of hot Jupiters with similar masses. WASP-73 b is significantly more massive (1.88_-0.06_^+0.07^M_Jup_) and slightly larger (1.16_-0.08_^+0.12^R_Jup_) than Jupiter. It orbits a V=10.5 F9-type star (1.34_-0.04_^+0.05^M_{sun}_, 2.07_-0.08_^+0.19^R_{sun}_, Teff=6036+/-120K) every 4.08722+/-0.00022-days. Despite its high irradiation (2.3*10^9^erg/s/cm^2^), WASP-73 b has a high mean density (1.20_-0.30_^+0.26^{rho}_Jup_) that suggests an enrichment of the planet in heavy elements. WASP-88 b is a 0.56+/-0.08M_Jup_ planet orbiting a V=11.4 F6-type star (1.45+/-0.05M_{sun}_, 2.08_-0.06_^+0.12^R_{sun}_, Teff=6431+/-130K) with a period of 4.954000+/-0.000019-days. With a radius of 1.70_-0.07_^+0.13^R_Jup_, it joins the handful of planets with super-inflated radii. The ranges of ages we determine through stellar evolution modeling are 4.5-7.0Gyr for WASP-68, 2.8-5.7Gyr for WASP-73 and 1.8-4.3Gyr for WASP-88. WASP-73 appears to be a significantly evolved star, close to or already in the subgiant phase. WASP-68 and WASP-88 are less evolved, although in an advanced stage of core H-burning.
- ID:
- ivo://CDS.VizieR/J/A+A/551/A80
- Title:
- WASP-80 photometric and radial velocity data
- Short Name:
- J/A+A/551/A80
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of a planet transiting the star WASP-80 (1SWASP J201240.26-020838.2; 2MASS J20124017-0208391; TYC 5165-481-1; BPM 80815; V=11.9, K=8.4). Our analysis shows this is a 0.55+/-0.04M_jup_, 0.95+/-0.03R_jup_ gas giant on a circular 3.07 day orbit around a star with a spectral type between K7V and M0V. This system produces one of the largest transit depths so far reported, making it a worthwhile target for transmission spectroscopy. We find a large discrepancy between the vsini* inferred from stellar line broadening and the observed amplitude of the Rossiter-McLaughlin effect. This can be understood either by an orbital plane nearly perpendicular to the stellar spin or by an additional, unaccounted for source of broadening.
- ID:
- ivo://CDS.VizieR/J/A+A/531/A24
- Title:
- WASP-23 photometric and radial velocity data
- Short Name:
- J/A+A/531/A24
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of a new transiting planet in the southern hemisphere. It was found by the WASP-south transit survey and confirmed photometrically and spectroscopically by the 1.2m Swiss Euler telescope, LCOGT 2m Faulkes South Telescope, the 60cm TRAPPIST telescope, and the ESO 3.6m telescope. The orbital period of the planet is 2.94 days. We find that it is a gas giant with a mass of 0.88+/-0.10M_J_ and an estimated radius of 0.96+/-0.05R_J_. We obtained spectra during transit with the HARPS spectrograph and detect the Rossiter-McLaughlin effect despite its small amplitude.
235. WASP 95-101 transits
- ID:
- ivo://CDS.VizieR/J/MNRAS/440/1982
- Title:
- WASP 95-101 transits
- Short Name:
- J/MNRAS/440/1982
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report the discovery of the transiting exoplanets WASP-95b, WASP-96b, WASP-97b, WASP-98b, WASP-99b, WASP-100b and WASP-101b. All are hot Jupiters with orbital periods in the range 2.1-5.7d, masses of 0.5-2.8M_Jup_ and radii of 1.1-1.4R_Jup_. The orbits of all the planets are compatible with zero eccentricity. WASP-99b produces the shallowest transit yet found by WASP-South, at 0.4 per cent. The host stars are of spectral type F2-G8. Five have metallicities of [Fe/H] from -0.03 to +0.23, while WASP-98 has a metallicity of -0.60, exceptionally low for a star with a transiting exoplanet. Five of the host stars are brighter than V=10.8, which significantly extends the number of bright transiting systems available for follow-up studies. WASP-95 shows a possible rotational modulation at a period of 20.7d. We discuss the completeness of WASP survey techniques by comparing to the HATnet project.
- ID:
- ivo://CDS.VizieR/J/ApJ/817/L20
- Title:
- Wolf 1061 velocities and planet candidates
- Short Name:
- J/ApJ/817/L20
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We use archival HARPS spectra to detect three planets orbiting the M3 dwarf Wolf 1061 (GJ 628). We detect a 1.36M_{Earth}_ minimum-mass planet with an orbital period P=4.888days (Wolf 1061b), a 4.25M_{Earth}_ minimum-mass planet with orbital period P=17.867days (Wolf 1061c), and a likely 5.21M_{Earth}_ minimum-mass planet with orbital period P=67.274days (Wolf 1061d). All of the planets are of sufficiently low mass that they may be rocky in nature. The 17.867day planet falls within the habitable zone for Wolf 1061 and the 67.274day planet falls just outside the outer boundary of the habitable zone. There are no signs of activity observed in the bisector spans, cross-correlation FWHMs, calcium H & K indices, NaD indices, or H{alpha} indices near the planetary periods. We use custom methods to generate a cross-correlation template tailored to the star. The resulting velocities do not suffer the strong annual variation observed in the HARPS DRS velocities. This differential technique should deliver better exploitation of the archival HARPS data for the detection of planets at extremely low amplitudes.
- ID:
- ivo://CDS.VizieR/J/A+A/605/L11
- Title:
- YZ Ceti radial velocity curve
- Short Name:
- J/A+A/605/L11
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Exoplanet surveys have shown that systems with multiple low-mass planets on compact orbits are common. Except for a few cases, however, the masses of these planets are generally unknown. At the very end of the main sequence, host stars have the lowest mass and hence offer the largest reflect motion for a given planet. In this context, we monitored the low-mass (0.13M_{sun}_) M dwarf YZ Cet (GJ 54.1, HIP 5643) intensively and obtained radial velocities and stellar-activity indicators derived from spectroscopy and photometry, respectively. We find strong evidence that it is orbited by at least three planets in compact orbits (Porb=1.97, 3.06, 4.66 days), with the inner two near a 2:3 mean-motion resonance. The minimum masses are comparable to the mass of Earth (Msini=0.75+/-0.13, 0.98+/-0.14, and 1.14+/-0.17M_{earth}_), and they are also the lowest masses measured by radial velocity so far. We note the possibility for a fourth planet with an even lower mass of Msini=0.472+/-0.096 Mearth at Porb=1.04-days. An n-body dynamical model is used to place further constraints on the system parameters. At 3.6 parsecs, YZ Cet is the nearest multi-planet system detected to date.