output
19912026
Showing 2023 · astro-ph.SRShow all

20 papers · 2 filters

astro-ph.SR2023★ 4 cited

The physical properties of T Pyx as measured by MUSE I. The geometrical distribution of the ejecta and the distance to the remnant

L. Izzo, L. Pasquini, E. Aydi +8

T Pyx is one of the most enigmatic recurrent novae, and it has been proposed as a potential Galactic type-Ia supernova progenitor. Using spatially-resolved data obtained with MUSE,…

astro-ph.SR2023

CD-27 11535: Evidence for a Triple System in the Pictoris Moving Group

Andrew D. Thomas, Eric L. Nielsen, Robert J. De Rosa +20

We present new spatially resolved astrometry and photometry of the CD-27 11535 system, a member of the Pictoris moving group consisting of two resolved K-type stars on a …

astro-ph.SR2023

A Possible Correlation between Metallicity and Near-IR Color for Late-M and L Dwarfs

Ruihan Zhang, Michael C. Liu, Zhoujian Zhang

We examine the relationship between metallicity and color for 64 benchmark late-M and L dwarfs, all of which are wide companions to higher mass stars, and 6 of which are new…

astro-ph.SR2023

The Hawaii Infrared Parallax Program. VI. The Fundamental Properties of 1000+ Ultracool Dwarfs and Planetary-mass Objects Using Optical to Mid-IR SEDs and Comparison to BT-Settl and ATMO 2020 Model Atmospheres

Aniket Sanghi, Michael C. Liu, William M. Best +7

We derive the bolometric luminosities () of 865 field-age and 189 young ultracool dwarfs (spectral types M6-T9, including 40 new discoveries presented here) by di…

astro-ph.SR2023★ 3 cited

Assessing the Observability of Deep Meridional Flow Cells in the Solar Interior

J. R. Fuentes, Bradley W. Hindman, Junwei Zhao +6

Meridional circulation regulates the Sun's interior dynamics and magnetism. While it is well accepted that meridional flows are poleward at the Sun's surface, helioseismic observat…

astro-ph.SR2023★ 4 cited

The stellar thermal wind as a consequence of oblateness

Loren I. Matilsky

In many rotating fluids, the lowest-order force balance is between gravity, pressure, and rotational acceleration ('GPR' balance). Terrestrial GPR balance takes the form of geostro…

astro-ph.SR2023★ 15 cited

An Investigation of Non-Canonical Mixing in Red Giant Stars Using APOGEE 12C/13C Ratios Observed in Open Cluster Stars

Caroline McCormick, Steven R. Majewski, Verne V. Smith +9

Standard stellar evolution theory poorly predicts the surface abundances of chemical species in low-mass, red giant branch (RGB) stars. Observations show an enhancement of p-p chai…

astro-ph.SR2023★ 21 cited

Type II-P Supernova Progenitor Star Initial Masses and SN 2020jfo: Direct Detection, Light Curve Properties, Nebular Spectroscopy, and Local Environment

Charles D. Kilpatrick, Luca Izzo, Rory O. Bentley +23

We present optical, ultraviolet, and infrared data of the type II supernova (SN II) 2020jfo at 14.5 Mpc. This wealth of multiwavelength data allows to compare different metrics com…

astro-ph.SR2023★ 12 cited

The Occurrence Rate of Quiescent Radio Emission for Ultracool Dwarfs using a Generalized Semi-Analytical Bayesian Framework

Melodie M. Kao, Evgenya L. Shkolnik

We present a generalized analytical Bayesian framework for calculating the occurrence rate of steady emission (or absorption) in astrophysical objects. As a proof-of-concept, we ap…

astro-ph.SR2023★ 23 cited

A close-in giant planet escapes engulfment by its star

Marc Hon, Daniel Huber, Nicholas Z. Rui +39

When main-sequence stars expand into red giants, they are expected to engulf close-in planets. Until now, the absence of planets with short orbital periods around post-expansion, c…

astro-ph.SR2023★ 25 cited

Modeling of the nebular-phase spectral evolution of stripped-envelope supernovae. New grids from 100 to 450 days

Luc Dessart, D. John Hillier, S. E. Woosley +1

We present an extended grid of multi-epoch 1D nonlocal thermodynamic equilibrium radiative transfer calculations for nebular-phase Type Ibc supernovae (SNe) from He-star explosions…

astro-ph.SR2023★ 57 cited

The First JWST Spectral Energy Distribution of a Y dwarf

Samuel Beiler, Michael Cushing, Davy Kirkpatrick +3

We present the first JWST spectral energy distribution of a Y dwarf. This spectral energy distribution of the Y0 dwarf WISE J035934.06540154.6 consists of low-resolution (/$Δ…

astro-ph.SR2023★ 96 cited

SN2023ixf in Messier 101: A Variable Red Supergiant as the Progenitor Candidate to a Type II Supernova

Charles D. Kilpatrick, Ryan J. Foley, Wynn V. Jacobson-Galán +15

We present pre-explosion optical and infrared (IR) imaging at the site of the type II supernova (SN II) 2023ixf in Messier 101 at 6.9 Mpc. We astrometrically registered a ground-ba…

astro-ph.SR2023★ 10 cited

From Dust to Nanodust: Resolving Circumstellar Dust from the Colliding-Wind Binary Wolf-Rayet (WR) 140

Ryan M. Lau, Jason Wang, Matthew J. Hankins +17

Wolf-Rayet (WR) 140 is the archetypal periodic dust-forming colliding-wind binary that hosts a carbon-rich WR (WC) star and an O-star companion with an orbital period of 7.93 years…

astro-ph.SR2023★ 22 cited

A novel survey for young substellar objects with the W-band filter VI: Spectroscopic census of sub-stellar members and the IMF of Orionis cluster

Belinda Damian, Jessy Jose, Beth Biller +11

Low-mass stars and sub-stellar objects are essential in tracing the initial mass function (IMF). We study the nearby young Orionis cluster (d408 pc; age1.8 Myr) usi…

astro-ph.SR2023

HIP 67506 C: MagAO-X Confirmation of a New Low-Mass Stellar Companion to HIP 67506 A

Logan A. Pearce, Jared R. Males, Sebastiaan Y. Haffert +17

We report the confirmation of HIP 67506 C, a new stellar companion to HIP 67506 A. We previously reported a candidate signal at 2/D (240~mas) in L in MagAO/Clio imagi…

astro-ph.SR2023★ 98 cited

The star formation history of the Sco-Cen association. Coherent star formation patterns in space and time

Sebastian Ratzenböck, Josefa E. Großschedl, João Alves +13

We reconstruct the star formation history of the Sco-Cen OB association using a novel high-resolution age map of the region. We develop an approach to produce robust ages for Sco-C…

astro-ph.SR2023★ 20 cited

First Observations of the Brown Dwarf HD 19467 B with JWST

Alexandra Z. Greenbaum, Jorge Llop-Sayson, Ben Lew +21

We observed HD 19467 B with JWST's NIRCam in six filters spanning 2.5-4.6 with the Long Wavelength Bar coronagraph. The brown dwarf HD 19467 B was initially identified through…

astro-ph.SR2023★ 10 cited

Discovery of a resolved white dwarf-brown dwarf binary with a small projected separation: SDSS J222551.65+001637.7AB

Jenni R. French, Sarah L. Casewell, Trent J. Dupuy +4

We present the confirmation of SDSS J222551.65+001637.7AB as a closely separated, resolved, white dwarf-brown dwarf binary. We have obtained spectroscopy from GNIRS and seeing-limi…

astro-ph.SR2023★ 20 cited

Surveying Nearby Brown Dwarfs with HGCA: Direct Imaging Discovery of a Faint, High-Mass Brown Dwarf Orbiting HD 176535 A

Yiting Li, Timothy D. Brandt, G. Mirek Brandt +16

Brown dwarfs with well-measured masses, ages and luminosities provide direct benchmark tests of substellar formation and evolutionary models. We report the first results from a dir…