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A Comprehensive Investigation of Metals in the Circumgalactic Medium of Nearby Dwarf Galaxies
McQuinn, Kristen B. W.; Burchett, Joseph N.; Putman, Mary E. +7 more
Dwarf galaxies are found to have lost most of their metals via feedback processes; however, there still lacks consistent assessment on the retention rate of metals in their circumgalactic medium (CGM). Here we investigate the metal content in the CGM of 45 isolated dwarf galaxies with M * = 106.5-9.5 M ⊙ (M 20…
TIPSY: Trajectory of Infalling Particles in Streamers around Young stars. Dynamical analysis of the streamers around S CrA and HL Tau
Yen, Hsi-Wei; Williams, Jonathan P.; Birnstiel, Til +3 more
Context. Elongated trails of infalling gas, often referred to as "streamers," have recently been observed around young stellar objects (YSOs) at different evolutionary stages. This asymmetric infall of material can significantly alter star and planet formation processes, especially in the more evolved YSOs.
Aims: In order to ascertain the inf…
Properties of an Interplanetary Shock Observed at 0.07 and 0.7 au by Parker Solar Probe and Solar Orbiter
Zank, Gary P.; Zhao, Lingling; Karlsson, Tomas +23 more
The Parker Solar Probe (PSP) and Solar Orbiter (SolO) missions opened a new observational window in the inner heliosphere, which is finally accessible to direct measurements. On 2022 September 5, a coronal mass ejection (CME)-driven interplanetary (IP) shock was observed as close as 0.07 au by PSP. The CME then reached SolO, which was radially wel…
The NIRSpec Wide GTO Survey
Maseda, Michael V.; Parlanti, Eleonora; Carniani, Stefano +20 more
The Near-infrared Spectrograph (NIRSpec) on the James Webb Space Telescope is uniquely suited to studying galaxies in the distant Universe with its combination of multi-object capabilities and sensitivity over a large range in wavelength (0.6 ‑ 5.3 µm). Here we present the NIRSpec Wide survey, part of the NIRSpec Instrument Science Team's Gu…
Wide Post-common Envelope Binaries from Gaia: Orbit Validation and Formation Models
El-Badry, Kareem; Mazeh, Tsevi; Yamaguchi, Natsuko +3 more
Astrometry from Gaia DR3 has enabled the discovery of a sample of 3000+ binaries containing white dwarfs (WD) and main-sequence (MS) stars in relatively wide orbits, with orbital periods P orb = (100–1000) days. This population was not predicted by binary population synthesis models before Gaia and—if the Gaia orbits are robust—likely r…
Cepheid Metallicity in the Leavitt Law (C- MetaLL) survey. IV. The metallicity dependence of Cepheid period-luminosity relations
Clementini, G.; Ripepi, V.; Molinaro, R. +10 more
Context. Classical Cepheids (DCEPs) play a fundamental role in the calibration of the extragalactic distance ladder, which eventually leads to the determination of the Hubble constant (H0) thanks to the period-luminosity (PL) and period-Wesenheit (PW) relations exhibited by these pulsating variables. Therefore, it is of great importance…
Surviving the waves: evidence for a dark matter cusp in the tidally disrupting Small Magellanic Cloud
Massana, Pol; Erkal, Denis; De Leo, Michele +3 more
We use spectroscopic data for
EDGE: The direct link between mass growth history and the extended stellar haloes of the faintest dwarf galaxies
Orkney, Matthew D. A.; Pontzen, Andrew; Noël, Noelia E. D. +9 more
Ultra-faint dwarf galaxies (UFDs) are commonly found in close proximity to the Milky Way and other massive spiral galaxies. As such, their projected stellar ellipticity and extended light distributions are often thought to owe to tidal forces. In this paper, we study the projected stellar ellipticities and faint stellar outskirts of tidally isolat…
High-redshift, Small-scale Tests of Ultralight Axion Dark Matter Using Hubble and Webb Galaxy UV Luminosities
Hložek, Renée; Marsh, David J. E.; Winch, Harrison +1 more
We calculate the abundance of UV-bright galaxies in the presence of ultralight axion (ULA) dark matter (DM), finding that axions suppress their formation with a non-trivial dependence on redshift and luminosity. We set limits on axion DM using UV luminosity function (UVLF) data, excluding a single axion as all the DM for m ax < 10
IPA: Class 0 Protostars Viewed in CO Emission Using JWST
Manoj, P.; Narang, Mayank; Bourke, Tyler L. +24 more
We investigate the bright CO fundamental emission in the central regions of five protostars in their primary mass assembly phase using new observations from JWST's Near-Infrared Spectrograph and Mid-Infrared Instrument. CO line emission images and fluxes are extracted for a forest of ∼150 rovibrational transitions from two vibrational bands, v = 1…