The UKIRT M33 Monitoring Project: A 15-Year Near-Infrared Variable Star Catalogue for the Central Kiloparsec, and Prospects for Star Formation History and Dust Return
We present results from the UKIRT M33 Monitoring Project, a near-infrared survey of variable red giants in the Local Group spiral galaxy M33. Combining four independent photometric datasets spanning UIST (2003), UFTI (2005), WFCAM (2005-2007), and a new UKIRT Hemisphere Survey epoch (2018), we construct a homogenised 15.11-year $K$-band light-curve catalogue for 847 stars in the central kiloparsec, of which 771 (91 per cent) are variable. Cross-matching with archival Spitzer photometry identifies 120 dust-enshrouded AGB candidates. We compare the spatial coverage of this central catalogue with the earlier UIST-only (Paper I) and disc-wide WFCAM (Paper IV) variable-star surveys. Building on this catalogue, two forthcoming papers will (i) measure individual pulsation periods to reconstruct the star formation history of the central kiloparsec, and (ii) refine dust and gas mass-loss rates across the disc using the extended time baseline.
We present a homogeneous Hubble Space Telescope/Advanced Camera for Surveys F555W and F814W time-series census of variable stars in two M101 disk fields, using a uniform multiband reduction and reproducible variable-selection workflow for nearby supernova host galaxies. Supplementary archival F555W epochs are used only...
O2 stars define the hottest end of the normal O-star sequence, but their identification requires blue-optical nitrogen diagnostics, which are absent in many surveys.
We reassess three luminous Large Magellanic Cloud (LMC) sources with multi-epoch Sloan Digital Sky Survey V spectroscopy obtained with the Baryon Oscillat...
A. Roman-Lopes, J. G. Fernández-Trincado, M. Kounkel et al.· Astronomy & Astrophysics· 0 citations
While long-term radial velocity (RV) monitoring has successfully mapped blue straggler star (BSS) multiplicity in nearby, unreddened open clusters, such spectroscopic surveys are observationally prohibitive for distant (d > 2 kpc) and moderately reddened Galactic clusters. To bypass this limitation, we present a gene...
Huan-Bin Chi, Jin-Li Lv· Monthly notices of the Royal...· 0 citations
I present the results of a long-term CCD photometric monitoring programme carried out at the Osservatorio Astronomico "Nastro Verde" (MPC Code C82), Sorrento, Italy, targeting known variable stars in two constellations: Cygnus (nine fields plus one adjacent field in Lacerta, 2012–2018) and Gemini (four fields, 2017–201...
N. Ruocco· Open European Journal on Var...· 0 citations
We present the discovery of RX J0534.0-0221 b, a giant planet orbiting an M dwarf star in the β Pictoris moving group. RX J0534 was originally observed with JWST/NIRCam in the F444W and F200W filters. Observations in F444W reveal a point source at signal-to-noise ratio ∼17.5 at ∼0.″41 (∼14 au) from the host star, with...
Rodrigo Ferrer-Chávez, Jason J. Wang, K. Wagner et al.· Astrophysical Journal Letter...· 0 citations
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