A. Laza-Ramos
A5075894004- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- High-pressure geophysics and materials
- Scientific Research and Discoveries
- Space Exploration and Technology
Universitat de València
2024
Instituto de Astrofísica de Canarias
2022-2023
Universidad de La Laguna
2022
ABSTRACT We use multi-object near-infrared spectroscopy with VLT/KMOS to investigate the role of environment in evolution ionized gas properties narrow-band-selected H α emitters (HAEs) Spiderweb protocluster at z = 2.16. Based on rest-frame optical emission lines, and [N ii]λ6584, we confirm cluster membership 39 our targets (i.e. 93 per cent success rate), measure their star formation rates (SFR), gas-phase oxygen abundances, effective radius. parametrize where reside using local global...
Recent discoveries of Earth-sized planets transiting nearby M dwarfs have made it possible to characterize the atmospheres terrestrial via follow-up spectroscopic observations. However, number such receiving low insolation is still small, limiting our ability understand diversity atmospheric composition and climates temperate planets. We report discovery an planet (12 pc) inactive M3.0 dwarf Gliese 12 (TOI-6251) with orbital period ($P_{\rm{orb}}$) 12.76 days. The planet, 12b, was initially...
Context. Exoplanets with orbital periods of less than one day are known as ultra-short period (USP) planets. They relatively rare products planetary formation and evolution processes, but especially favourable for characterisation current planet detection methods. At the time writing, 125 USP planets have already been confirmed. Aims. Our aim is to validate nature two new transiting candidates around M dwarfs announced by NASA Transiting Exoplanet Survey Satellite (TESS), registered TESS...
Metallicity is a crucial tracer of galaxy evolution, providing insights into gas accretion, star formation, and feedback. At high redshift, these processes reveal how early galaxies assembled enriched their interstellar medium. In this work, we present rest-frame optical spectroscopy 12 massive ($\log(M_*/\mathrm{M_{\odot}})>9$) at $z\sim 6$-$8$ from the REBELS ALMA large program, observed with JWST NIRSpec/IFU in prism mode. These observations span emission lines [OII]$\lambda$3727,9 to...
The NASA space telescope $TESS$ is currently in the extended mission of its all-sky search for new transiting planets. Of thousands candidates that TESS expected to deliver, planets orbiting nearby M dwarfs are particularly interesting targets since they provide a great opportunity characterize their atmospheres by transmission spectroscopy. We aim validate and sub-Neptune-sized planet candidate TOI-2136.01 dwarf ($d = 33.36 \pm 0.02$ pc, $T_{eff} 3373 108$ K) with an orbital period 7.852...
Abstract Sub-Neptunes with radii of 2–3 R ⊕ are intermediate in size between rocky planets and Neptune-sized planets. The orbital properties bulk compositions transiting sub-Neptunes provide clues to the formation evolution close-in small In this paper, we present discovery follow-up four orbiting M dwarfs (TOI-782, TOI-1448, TOI-2120, TOI-2406), three which were newly validated by ground-based observations statistical analyses. TOI-782 b, TOI-1448 TOI-2120 TOI-2406 b have <mml:math...
We report the discovery and validation of two TESS exoplanets orbiting faint M dwarfs: TOI-4479b TOI-2081b. have jointly analyzed space (TESS mission) ground based (MuSCAT2, MuSCAT3 SINISTRO instruments) lightcurves using our multi-color photometry transit analysis pipeline. This allowed us to compute contamination limits for both candidates validate them as planet-sized companions. found be a sub-Neptune-sized planet ($R_{p}=2.82^{+0.65}_{-0.63}~\rm R_{\oplus}$) TOI-2081b super-Earth-sized...
Sub-Neptunes with $2-3R_\oplus$ are intermediate in size between rocky planets and Neptune-sized planets. The orbital properties bulk compositions of transiting sub-Neptunes provide clues to the formation evolution close-in small In this paper, we present discovery follow-up four orbiting M dwarfs (TOI-782, TOI-1448, TOI-2120, TOI-2406), three which were newly validated by ground-based observations statistical analyses. TOI-782 b, TOI-1448 TOI-2120 TOI-2406 b have radii $R_\mathrm{p} =...
The TESS mission searches for transiting exoplanets by monitoring the brightness of hundreds thousands stars across entire sky. M-type planet hosts are ideal targets this due to their smaller size and cooler temperatures, which makes it easier detect planets near or within habitable zones. Additionally, M dwarfs have a contrast ratio between star, making measure planet’s properties accurately. Here, we report validation analysis 13 exoplanet candidates orbiting around dwarfs. We studied...
The TESS mission searches for transiting exoplanets by monitoring the brightness of hundreds thousands stars across entire sky. M-type planet hosts are ideal targets this due to their smaller size and cooler temperatures, which makes it easier detect planets near or within habitable zones. Additionally, M~dwarfs have a contrast ratio between star, making measure planet's properties accurately. Here, we report validation analysis 13 exoplanet candidates orbiting around M dwarfs. We studied...
We use multi-object near-infrared (NIR) spectroscopy with VLT/KMOS to investigate the role of environment in evolution ionized gas properties narrow-band selected H$α$ emitters (HAEs) Spiderweb protocluster at $z=2.16$. Based on rest-frame optical emission lines, and [NII]$λ$6584, we confirm cluster membership 39 our targets (i.e. 93% success rate), measure their star-formation rates (SFR), gas-phase oxygen abundances effective radius. parametrize where reside by using local global density...