39 citations · 179 across the 24 of their papers we have counts for
24 papers
Two temperate Earth- and Neptune-sized planets orbiting fully convective M dwarfs
Madison G. Scott, Georgina Dransfield, Mathilde Timmermans +30
As the diversity of exoplanets continues to grow, it is important to revisit assumptions about habitability and classical HZ definitions. In this work, we introduce an expanded 'te…
Two warm Earth-sized exoplanets and an Earth-sized candidate in the M5V-M6V binary system TOI-2267
S. Zúñiga-Fernández, F. J. Pozuelos, M. Dévora-Pajares +63
We report two warm Earth-sized exoplanets orbiting the close binary TOI-2267 (M5+M6, separation ~8 au). Data from TESS and ground-based facilities confirm the planets, but we canno…
SPECULOOS: five years hunting terrestrial planets around ultra-cool dwarfs
Sebastián Zúñiga-Fernández, Michael Gillon, SPECULOOS consortium
The SPECULOOS (Search for habitable Planets EClipsing ULtra-cOOl Stars) project aims to detect temperate terrestrial planets transiting nearby ultracool dwarfs, including late M-dw…
Gravity-sensitive Spectral Indices in Ultracool Dwarfs: Investigating Correlations with Metallicity and Planet Occurrence using SpeX and FIRE Observations
Fatemeh Davoudi, Benjamin V. Rackham, Julien de Wit +5
We present a near-infrared spectroscopic analysis (0.9--2.4~m) of gravity indices for 56 ultracool dwarfs (M5.5--L0), including exoplanet hosts SPECULOOS-2, SPECULOOS-3, and LHS…
TOI-6508b: A massive transiting brown dwarf orbiting a low-mass star
K. Barkaoui, D. Sebastian, S. Zúñiga-Fernández +44
We report the discovery of a transiting brown dwarf orbiting a low-mass star, TOI-6508b. Today, only ~50 transiting brown dwarfs have been discovered. TOI-6508b was first detected…
TOI-2015b: a sub-Neptune in strong gravitational interaction with an outer non-transiting planet
K. Barkaoui, J. Korth, E. Gaidos +119
TOI-2015 is a known exoplanetary system around an M4 dwarf star, consisting of a transiting sub-Neptune planet in a 3.35-day orbital period, TOI-2015b, accompanied by a non-transit…
TESS discovery of two super-Earths orbiting the M-dwarf stars TOI-6002 and TOI-5713 near the radius valley
M. Ghachoui, B. V. Rackham, M. Dévora-Pajares +45
We present the validation of two TESS super-Earth candidates transiting the mid-M dwarfs TOI-6002 and TOI-5713 every 10.90 and 10.44 days, respectively. The first star (TOI-6002) i…
TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system
M. Timmermans, G. Dransfield, M. Gillon +54
Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for at…
Looking For Timing Variations in the Transits of 16 Exoplanets
S. Yalçınkaya, E. M. Esmer, Ö. Baştürk +27
We update the ephemerides of 16 transiting exoplanets using our ground-based observations, new TESS data, and previously published observations including those of amateur astronome…
TOI-2084 b and TOI-4184 b: two new sub-Neptunes around M dwarf stars
K. Barkaoui, M. Timmermans, A. Soubkiou +67
We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084b, and TOI-4184b. We characterized the host stars by combining spectra from Shane/K…
The Photometric Study of Six W UMa Systems and Investigation of the Mass-Radius Relations for Contact Binary Stars
Atila Poro, Ehsan Paki, Mark G. Blackford +13
We present the photometric analysis of six short-period systems (EI Oct, V336 TrA, NX Boo, V356 Boo, PS Boo, and V2282 Cyg). This is the first photometric analysis of these systems…
Homogeneous Transit Timing Analyses of Ten Exoplanet Systems
Ö. Baştürk, E. M. Esmer, S. Yalçınkaya +19
We study the transit timings of 10 exoplanets in order to investigate potential Transit Timing Variations (TTVs) in them. We model their available ground-based light curves, some p…
Investigation of the Orbital Period and Mass Relations for W UMa-type Contact Systems
Atila Poro, Soroush Sarabi, Shiva Zamanpour +14
New relationships between the orbital period and some parameters of W Ursae Majoris (W UMa) type systems are presented in this study. To investigate the relationships, we calculate…
Investigation of an orbital decay and global modeling of the planet WASP-43 b
Fatemeh Davoudi, Özgür Baştürk, Selçuk Yalçınkaya +2
WASP-43 b is one of the most important candidates for detecting an orbital decay. We investigate pieces of evidence for this expectation as variations in its transit timings, based…
The New Ephemeris and Light Curve Analysis of V870 Ara by the Ground-Based and TESS Data
Atila Poro, Mark G. Blackford, Fatemeh Davoudi +4
New CCD photometric observations and their investigation of the W UMa-type binary, V870 Ara, are presented. Light curves of the system were taken through BVI filters from the Conga…
Observational and Theoretical Studies of 27 Scuti Stars with Investigation of the Period-Luminosity Relation
Atila Poro, Ehsan Paki, Golnaz Mazhari +11
The multi-color CCD photometric study of 27 Delta Scuti stars is presented. By using approximately three years of photometric observations, we obtained the times of maxima and magn…
Refined Ephemeris for Four Hot Jupiters using Ground-Based and TESS Observations
Fatemeh Davoudi, PegahSadat MirshafieKhozani, Ehsan Paki +11
WASP-12 b, WASP-33 b, WASP-36 b, and WASP-46 b are four transiting planetary systems which we have studied. These systems' light curves were derived from observations made by the T…
The First Light Curve Solutions of GW Leo and Period Study of Two Contact Binary Systems
Atila Poro, Afshin Halavati, Elahe Lashgari +5
We performed the first light curve analysis of GW Leo and a new ephemeris is obtained for QT Boo. In the present photometric study of two contact binary systems, we found that the…
BVRI Photometric Observations, Light Curve Solutions and Orbital Period Analysis of BF Pav
Atila Poro, Fahri Alicavus, Eduardo Fernández-Lajús +7
A new ephemeris, period change analysis and light curve modeling of the W UMa-type eclipsing binary BF Pav are presented in this study. Light curves of the system taken in BVRI fil…
The First Light Curve Solutions and Period Changes of EW Psc and HN Psc
F. Davoudi, A. Poro, F. Alicavus +13
The first light curve solutions of the stars EW and HN in Pisces constellation are presented. Photometry, and its' periodic changes are calculated and discussed. The analysis of O-…
Radius Study of Ten Transiting Hot Jupiter Exoplanets with Ground-Based Observations
F. Davoudi, A. Poro, E. Paki +9
In this research, 14 light curves of 10 hot Jupiter exoplanets available on Exoplanet Transit Database (ETD) were analyzed. We extracted the transit parameters using EXOFAST softwa…
The First Light Curve Solutions and Period Study of BQ Ari
A. Poro, F. Davoudi, F. Alicavus +14
The first analysis of the photometric observation in BVR filters of a W UMa type binary system BQ Ari was performed. Light curve analysis was performed using Wilson-Devinney (W-D)…
Transit Timing Variations of Five Transiting Planets
Ozgur Basturk, Ekrem M. Esmer, Seyma Torun +10
Transiting planets provide a unique opportunity to search for unseen additional bodies gravitationally bound to a system. It is possible to detect the motion of the center-of-mass…
Light Curve Analysis of Ground-Based Data from Exoplanets Transit Database
F. Davoudi, S. J. Jafarzadeh, A. Poro +9
Photometric observations of exoplanet transits can be used to derive the orbital and physical parameters of an exoplanet. We analyzed several transit light curves of exoplanets tha…