Results 121 to 130 of about 7,707 (224)

The Samples and Binary Fractions of Red Supergiants in M31 and M33 by the HST Observations

The Astrophysical Journal
The binarity of red supergiants (RSGs) influences their evolution and the fate of supernovae. We investigate the binary fraction of RSGs in the Andromeda galaxy (M31) and Triangulum galaxy (M33) using photometry from the Hubble Space Telescope (HST ...
Min Dai, Shu Wang, Biwei Jiang, Ying Li
doaj   +1 more source

The not so extraordinary globular cluster 037-B327 in M31 [PDF]

, 2006
A velocity dispersion has been measured for the luminous globular cluster M31 037-B327, claimed to be the most massive star cluster in the Local Group and to be a young "super star cluster" that has survived to an old age.
Cohen, Judith G.
core  

Reassessing the proper motions of M31/M33 with [PDF]

We provide an updated inference of the proper motion of M31 using the Gaia DR3 proper motions of bright stars from the disc of M31. By refining the motion of the quasar reference frame, and statistically accounting for the variations in the inferred ...
Samuel Rusterucci, Starkenburg, Else, Martin, Nicolas F., Else Starkenburg, Martin, Nicolas, F, Nicolas F. Martin, Rusterucci, Samuel, Rodrigo Ibata, Ibata, Rodrigo   +8 more
core   +1 more source

Project AMIGA: The Inner Circumgalactic Medium of Andromeda from Thick Disk to Halo

The Astrophysical Journal
The inner circumgalactic medium (CGM) of galaxies, where disk and halo processes intersect, remains poorly characterized despite its critical role in regulating galaxy evolution.
Nicolas Lehner, J. Christopher Howk, Lucy Collins, Sameer, Bart P. Wakker, Ramona Augustin, Kathleen A. Barger, Michelle A. Berg, Rongmon Bordoloi, Thomas M. Brown, Frances H. Cashman, Claude-André Faucher-Giguère, Andrew J. Fox, David M. French, Karoline M. Gilbert, Puragra Guhathakurta, John M. O’Meara, Brian W. O’Shea, Molly S. Peeples, D. J. Pisano, J. Xavier Prochaska, Jonathan Stern, Jason Tumlinson, Jessica K. Werk, Benjamin F. Williams   +24 more
doaj   +1 more source

Massive Stars in M31

, 2016
Massive stars are intrinsically rare and therefore present a challenge to understand from a statistical perspective, especially within the Milky Way. We recently conducted follow-up observations to the Panchromatic Hubble Andromeda Treasury (PHAT) survey
John Wisniewski, Julianne Dalcanton, Benjamin Williams, Jamie R. Lomax, Matthew Peters, Yumi Choi, Julie Lutz, Aaron Sigut   +7 more
core   +1 more source

Ring or No Ring—Revisiting the Multiphase Nuclear Environment in M31

The Astrophysical Journal
Nuclear rings, prevalent in barred galaxies, are essential to understanding gas transport toward galactic nuclei. However, the peculiar nuclear ring in our neighboring galaxy M31 remains poorly understood.
Zongnan Li, Zhao Su, Sumin Wang, Yufan F. Zhou, Zhiyuan Li, Xuanyi Lyu, Fanyi Meng, Kai Zhang, Di Li, Chaowei Tsai, Jingwen Wu, Jiachang Zhang   +11 more
doaj   +1 more source

Elemental abundances in M31: Individual and Coadded Spectroscopic [Fe/H] and [{\alpha}/Fe] throughout the M31 Halo with SPLASH

, 2022
We present spectroscopic chemical abundances of red giant branch (RGB) stars in Andromeda (M31), using medium resolution ($R\sim6000$) spectra obtained via the Spectroscopic and Photometric Landscape of Andromeda's Stellar Halo (SPLASH) survey.
Kirby, Evan N., Escala, Ivanna, Guhathakurta, Puragra, Majewski, Steven R., Beaton, Rachael L., Kalirai, Jason, Wojno, J. Leigh, Gilbert, Karoline M., Chiba, Masashi   +8 more
core  

The Molecular Clouds of M31

The Astrophysical Journal
Deep interferometric observations of CO and dust continuum emission are obtained with the Submillimeter Array at 230 GHz to investigate the physical nature of the giant molecular cloud (GMC) population in the Andromeda galaxy (M31).
Charles J. Lada, Jan Forbrich, Glen Petitpas, Sébastien Viaene   +3 more
doaj   +1 more source

The Role of Pressure in the Structure and Stability of GMCs in the Andromeda Galaxy

The Astrophysical Journal
We revisit the role of pressure in the structure, stability, and confinement of Giant Molecular Clouds (GMCs) in light of recently published observations and analysis of the GMCs in the Andromeda galaxy (M31). That analysis showed that, in the absence of
Charles J. Lada, Jan Forbrich, Mark R. Krumholz, Eric Keto   +3 more
doaj   +1 more source

A systematic literature review of the Pay-What-You-Want pricing under PRISMA protocol

European Research on Management and Business Economics
This study aims to systematically examine the Pay-What-You-Want (PWYW) pricing model, which has become increasingly popular among innovative strategies. The PWYW model offers an unconventional approach by giving consumers the power to determine the price
Oktay Güzel, Emili Vizuete-Luciano, José María Merigó-Lindahl   +2 more
doaj   +1 more source