Search Publications
Astrometry in crowded fields towards the Galactic bulge
Minniti, Dante; Rejkuba, Marina; Marchetti, Tommaso +1 more
Context. The astrometry towards the Galactic bulge is hampered by high stellar crowding and patchy extinction. This effect is particularly severe for optical surveys such as the European Space Agency satellite Gala.
Aims: In this study, we assess the consistency of proper motion measurements between optical (Gaia DR3) and near-infrared (VIRAC…
The HST large programme on NGC 6752 - IV. The White Dwarf sequence
Salaris, M.; Apai, D.; Anderson, J. +13 more
We present our final study of the white dwarf cooling sequence (WD CS) in the globular cluster NGC 6752. The investigation is the main goal of a dedicated Hubble Space Telescope large program, for which all the observations are now collected. The WD CS luminosity function (LF) is confirmed to peak at mF606W ≃ 29.3 ± 0.1, consistent with…
On the Connection between Rieger-type and Magneto-Rossby Waves Driving the Frequency of the Large Solar Eruptions during Solar Cycles 19-25
Korsós, Marianna B.; Liu, Jiajia; Erdélyi, Robertus +2 more
Global solar activity variation mainly occurs over about an 11 yr cycle. However, both longer and shorter periodicities than the solar cycle are also present in many different solar activity indices. The longer timescales may be up to hundreds of years, while the shorter timescales for global solar variability could be within 0.5-2 yr, which inclu…
Observational Properties of 155 O- and B-type Massive Pulsating Stars
Shi, Xiang-dong; Qian, Sheng-bang; Zhu, Li-ying +3 more
O- and B-type (OB-type) pulsating stars are important objects for studying the structure and evolution of massive stars through asteroseismology. A large amount of data from various sky surveys provides an unprecedented opportunity to search for and study this kind of variable star. We identify 155 OB-type pulsating stars or candidates, including …
An HST COS ultraviolet spectroscopic survey of 311 DA white dwarfs - I. Fundamental parameters and comparative studies
Hermes, J. J.; Redfield, Seth; Sahu, Snehalata +8 more
White dwarf studies carry significant implications across multiple fields of astrophysics, including exoplanets, supernova explosions, and cosmological investigations. Thus, accurate determinations of their fundamental parameters (Teff and log g) are of utmost importance. While optical surveys have provided measurements for many white d…
The gas mass reservoir of quiescent galaxies at cosmic noon
Magnelli, B.; Daddi, E.; Elbaz, D. +14 more
We present a 1.1 mm stacking analysis of moderately massive (log(M*/M⊙) = 10.7 ± 0.2) quiescent galaxies (QGs) at ⟨z⟩∼1.5, searching for cold dust continuum emission, which serves as an excellent tracer of dust and gas mass. Using both the recent GOODS-ALMA survey, as well as the full suite of ALMA Band-6 ancillary data in th…
Membership Analysis and 3D Kinematics of the Star-forming Complex around Trumpler 37 Using Gaia-DR3
Jose, Jessy; Das, Swagat R.; Gupta, Saumya +2 more
Identifying and characterizing young populations of star-forming regions are crucial to unraveling their properties. In this regard, Gaia-DR3 data and machine-learning tools are very useful for studying large star-forming complexes. In this work, we analyze the ~7.1 deg2 area of one of our Galaxy's dominant feedback-driven star-forming …
Panchromatic Photometry of Low-redshift, Massive Galaxies Selected from SDSS Stripe 82
Ho, Luis C.; Zhuang, Ming-Yang; Shangguan, Jinyi +2 more
The broadband spectral energy distribution of a galaxy encodes valuable information on its stellar mass, star formation rate (SFR), dust content, and possible fractional energy contribution from nonstellar sources. We present a comprehensive catalog of panchromatic photometry, covering 17 bands from the far-ultraviolet to 500 µm, for 2685 lo…
Predicting the Yield of Small Transiting Exoplanets around Mid-M and Ultracool Dwarfs in the Nancy Grace Roman Space Telescope Galactic Bulge Time Domain Survey
Muirhead, Philip S.; Dressing, Courtney D.; Tamburo, Patrick
We simulate the yield of small (0.5-4.0 R ⊕) transiting exoplanets around single mid-M and ultracool dwarfs (UCDs) in the Nancy Grace Roman Space Telescope Galactic Bulge Time Domain Survey. We consider multiple approaches for simulating M3-T9 sources within the survey fields, including scaling local space densities and using Galactic s…
Mesoscale phenomena and their contribution to the global response: a focus on the magnetotail transition region and magnetosphere-ionosphere coupling
Wang, Chih-Ping; Nishimura, Yukitoshi; Malaspina, David +24 more
An important question that is being increasingly studied across subdisciplines of Heliophysics is "how do mesoscale phenomena contribute to the global response of the system?" This review paper focuses on this question within two specific but interlinked regions in Near-Earth space: the magnetotail's transition region to the inner magnetosphere an…