- ID:
- ivo://CDS.VizieR/J/MNRAS/429/2001
- Title:
- New transiting planet candidates from Kepler
- Short Name:
- J/MNRAS/429/2001
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We have performed an extensive search for planet candidates in the publicly available Kepler long cadence data from quarters Q1 through Q6. The search method consists of initial de-trending of the data, applying the trend filtering algorithm, searching for transit signals with the Box Least Squares fitting method in three frequency domains, visual inspection of the potential transit candidates and an in-depth analysis of the shortlisted candidates. In this paper we present 150 new periodic planet candidates and seven single transit events, 72 of which are in multiple systems. The periods of these planet candidates vary from ~0.17 to ~440d. 124 of the planet candidates have radii smaller than 3R_{earth}_. We recover 82.5 per cent of the Batalha et al. (2012, Cat. J/ApJS/204/24). Kepler Objects of Interest (KOI) catalogue. We also report 40 newly identified false positives - systems that look like transiting planets, but are probably due to blended eclipsing binaries. Our search improves the statistics in the short-period and small-planet radii parameter ranges.
Number of results to display per page
Search Results
- ID:
- ivo://CDS.VizieR/J/AJ/142/84
- Title:
- 10 new transit light curves of HAT-P-13b
- Short Name:
- J/AJ/142/84
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present 10 new transit light curves of the transiting hot Jupiter HAT-P-13b, obtained during two observational seasons by three different telescopes. When combined with 12 previously published light curves, we have a sample consisting of 22 transit light curves, spanning 1041 days across four observational seasons. We use this sample to examine the recently observed large-amplitude transit timing variations (TTVs) by Pal et al. (2011MNRAS.413L..43P) and give refined system parameters. We find that the transit times are consistent with a linear ephemeris, with the exception of a single transit time, from UT 2009 November 5, for which the measured mid-transit time significantly deviates from our linear ephemeris. The nature of this deviation is not clear, and the rest of the data do not show any significant TTVs.
- ID:
- ivo://CDS.VizieR/J/A+A/539/A28
- Title:
- New transit photometry for super-Earth 55 Cnc e
- Short Name:
- J/A+A/539/A28
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report on new transit photometry for the super-Earth 55 Cnc e obtained with Warm Spitzer/IRAC at 4.5um. An individual analysis of these new data leads to a planet radius of 2.21^+0.15^_-0.16_R_{earth}_, in good agreement with the values previously derived from the MOST and Spitzer transit discovery data. A global analysis of both Spitzer transit time-series improves the precision on the radius of the planet at 4.5um to 2.20+/-0.12R_{earth}_. We also performed an independent analysis of the MOST data, paying particular attention to the influence of the systematic effects of instrumental origin on the derived parameters and errors by including them in a global model instead of performing a preliminary detrending-filtering processing. We deduce from this reanalysis of MOST data an optical planet radius of 2.04+/-0.15R_{earth}_ that is consistent with our Spitzer infrared radius
- ID:
- ivo://CDS.VizieR/J/ApJ/777/160
- Title:
- NIR imaging survey for planets around MG stars
- Short Name:
- J/ApJ/777/160
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report results of a direct imaging survey for giant planets around 80 members of the {beta} Pic, TW Hya, Tucana-Horologium, AB Dor, and Hercules-Lyra moving groups, observed as part of the Gemini/NICI Planet-Finding Campaign. For this sample, we obtained median contrasts of {Delta}H=13.9mag at 1" in combined CH_4_ narrowband ADI+SDI mode and median contrasts of {Delta}H=15.1mag at 2" in H-band ADI mode. We found numerous (>70) candidate companions in our survey images. Some of these candidates were rejected as common-proper motion companions using archival data; we reobserved with Near-Infrared Coronagraphic Imager (NICI) all other candidates that lay within 400AU of the star and were not in dense stellar fields. The vast majority of candidate companions were confirmed as background objects from archival observations and/or dedicated NICI Campaign followup. Four co-moving companions of brown dwarf or stellar mass were discovered in this moving group sample: PZ Tel B (36+/-6M_Jup_, 16.4+/-1.0AU), CD-35 2722B (31+/-8M_Jup_, 67+/-4AU), HD 12894B (0.46+/-0.08M_{sun}_, 15.7+/-1.0AU), and BD+07 1919C (0.20+/-0.03M_{sun}_, 12.5+/-1.4AU). From a Bayesian analysis of the achieved H band ADI and ASDI contrasts, using power-law models of planet distributions and hot-start evolutionary models, we restrict the frequency of 1-20M_Jup_ companions at semi-major axes from 10-150AU to <18% at a 95.4% confidence level using DUSTY models and to <6% at a 95.4% using COND models. Our results strongly constrain the frequency of planets within semi-major axes of 50 AU as well. We restrict the frequency of 1-20M_Jup_ companions at semi-major axes from 10-50AU to <21% at a 95.4% confidence level using DUSTY models and to <7% at a 95.4% using COND models. This survey is the deepest search to date for giant planets around young moving group stars.
- ID:
- ivo://CDS.VizieR/J/A+A/605/L9
- Title:
- NIR spectrum of exoplanet HIP 65426b
- Short Name:
- J/A+A/605/L9
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The SHINE program is a high-contrast near-infrared survey of 600 young, nearby stars aimed at searching for and characterizing new planetary systems using VLT/SPHERE's unprecedented high-contrast and high-angular-resolution imaging capabilities. It is also intended to place statistical constraints on the rate, mass and orbital distributions of the giant planet population at large orbits as a function of the stellar host mass and age to test planet-formation theories. We used the IRDIS dual-band imager and the IFS integral field spectrograph of SPHERE to acquire high-contrast coronagraphic differential near-infrared images and spectra of the young A2 star HIP 65426. It is a member of the ~17Myr old Lower Centaurus-Crux association. At a separation of 830 mas (92au projected) from the star, we detect a faint red companion. Multi-epoch observations confirm that it shares common proper motion with HIP 65426. Spectro-photometric measurements extracted with IFS and IRDIS between 0.95 and 2.2{mu}m indicate a warm, dusty atmosphere characteristic of young low-surface-gravity L5-L7 dwarfs. Hot-start evolutionary models predict a luminosity consistent with a 6-12M_Jup_, T_eff_=1300-1600K and R=1.5+/-0.1R_Jup_ giant planet. Finally, the comparison with Exo-REM and PHOENIX BT-Settl synthetic atmosphere models gives consistent effective temperatures but with slightly higher surface gravity solutions of log(g)=4.0-5.0 with smaller radii (1.0-1.3R_Jup_). Given its physical and spectral properties, HIP 65426 b occupies a rather unique placement in terms of age, mass, and spectral-type among the currently known imaged planets. It represents a particularly interesting case to study the presence of clouds as a function of particle size, composition, and location in the atmosphere, to search for signatures of non-equilibrium chemistry, and finally to test the theory of planet formation and evolution.
- ID:
- ivo://CDS.VizieR/J/MNRAS/420/L23
- Title:
- Non-resonant Kepler planetary systems
- Short Name:
- J/MNRAS/420/L23
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Kepler mission has discovered a plethora of multiple transiting planet candidate exosystems, many of which feature putative pairs of planets near mean motion resonance commensurabilities. Identifying potentially resonant systems could help guide future observations and enhance our understanding of planetary formation scenarios. We develop and apply an algebraic method to determine which Kepler two-planet systems cannot be in a first-fourth order resonance, given the current, publicly available data. This method identifies when any potentially resonant angle of a system must circulate. We identify and list 70 near-resonant systems which cannot actually reside in resonance, assuming a widely used formulation for deriving planetary masses from their observed radii and that these systems do not contain unseen bodies that affect the interactions of the observed planets. This work strengthens the argument that a high fraction of exoplanetary systems may be near resonance but not actually in resonance.
- ID:
- ivo://CDS.VizieR/J/A+A/576/A94
- Title:
- Northern bright planet host stars parameters
- Short Name:
- J/A+A/576/A94
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this work we derive new precise and homogeneous parameters for 37 stars with planets. For this purpose, we analyze high resolution spectra obtained by the NARVAL spectrograph for a sample composed of bright planet host stars in the northern hemisphere. The new parameters are included in the SWEET-Cat online catalogue. To ensure that the catalogue is homogeneous, we use our standard spectroscopic analysis procedure, ARES + MOOG, to derive effective temperatures, surface gravities, and metallicities. These spectroscopic stellar parameters are then used as input to compute the stellar mass and radius, which are fundamental for the derivation of the planetary mass and radius.
- ID:
- ivo://CDS.VizieR/J/A+A/410/1039
- Title:
- Northern extra-solar planets ELODIE survey I
- Short Name:
- J/A+A/410/1039
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Here we list our 254 ELODIE + 5 CORALIE measurements obtained for the 6 stars with planetary companions presented in the paper. ELODIE is a high-resolution (42000) fiber-fed echelle spectrograph mounted on the Cassegrain focus of the 1.93-m Telescope at Observatoire de Haute-Provence (France). CORALIE is a high-resolution (50000) fiber-fed echelle spectrograph mounted on the Nasmyth focus of the 1.2-m Euler Swiss Telescope at ESO-La Silla Observatory (Chile)
- ID:
- ivo://CDS.VizieR/J/ApJ/819/27
- Title:
- OAO/MuSCAT light curves of HAT-P-14b
- Short Name:
- J/ApJ/819/27
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The Multicolor Simultaneous Camera for studying Atmospheres of Transiting exoplanets (MuSCAT) is an optical three-band (g'_2_-, r'_2_- and z_s,2_-band) imager that was recently developed for the 188cm telescope at Okayama Astrophysical Observatory with the aim of validating and characterizing transiting planets. In a pilot observation with MuSCAT we observed a primary transit of HAT-P-14b, a high-surface gravity (g_p_=38ms^-2^) hot Jupiter around a bright (V=10) F-type star. From a 2.9hr observation we achieved the five-minute binned photometric precisions of 0.028%, 0.022%, and 0.024% in the g'_2_, r'_2_, and z_s,2_ bands, respectively, which provided the highest-quality photometric data for this planet. Combining these results with those of previous observations, we search for variations of transit timing and duration over five years as well as variations of planet-star radius ratio (Rp/Rs) with wavelengths, but can find no considerable variation in any parameters. On the other hand, using the transit-subtracted light curves we simulate the achievable measurement error of Rp/Rs with MuSCAT for various planetary sizes, assuming three types of host stars: HAT-P-14, the nearby K-dwarf HAT-P-11, and the nearby M-dwarf GJ1214. Comparing our results with the expected atmospheric scale heights, we find that MuSCAT is capable of probing the atmospheres of planets as small as a sub-Jupiter (Rp~6R_{earth}_) around HAT-P-14 in all bands, a Neptune (~4R_{earth}_) around HAT-P-11 in all bands, and a super-Earth (~2.5R_{earth}_) around GJ1214 in r'_2_ and z_s,2_ bands. These results promise that MuSCAT will produce fruitful scientific outcomes in the K2 and TESS era.
410. Observation of Pluto
- ID:
- ivo://CDS.VizieR/J/A+A/486/613
- Title:
- Observation of Pluto
- Short Name:
- J/A+A/486/613
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The purpose of this article is to present the new accurate astrometric CCD positions of Pluto, now designated as the minor planet 134340 Pluto and member of the Trans-Neptunian population. These positions were obtained from 1108 frames taken during 49 nights. The observations were distributed in 17 continuous missions between the years of 1995 and 2004. ************************************************************************** * * * Sorry, but the author(s) never supplied the tabular material * * announced in the paper * * * **************************************************************************