Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Julianne J. Dalcanton"'
Autor:
Nickolas M. Pingel, Hongxing Chen, Snežana Stanimirović, Eric W. Koch, Adam K. Leroy, Erik Rosolowsky, Chang-Goo Kim, Julianne J. Dalcanton, Fabian Walter, Michael P. Busch, Ryan Chown, Jennifer Donovan Meyer, Cosima Eibensteiner, Deidre A. Hunter, Sumit K. Sarbadhicary, Elizabeth Tarantino, Vicente Villanueva, Thomas G. Williams
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 93 (2024)
Measuring the properties of the cold neutral medium (CNM) in low-metallicity galaxies provides insights into heating and cooling mechanisms in early Universe-like environments. We report detections of two localized atomic neutral hydrogen (H i ) abso
Externí odkaz:
https://doaj.org/article/ffcdf0edea654c2cbdb88dc49be12e14
Autor:
Tobin M. Wainer, Benjamin F. Williams, L. Clifton Johnson, Daniel R. Weisz, Julianne J. Dalcanton, Anil C. Seth, Andrew Dolphin, Meredith J. Durbin, Eric F. Bell, Zhuo Chen, Puragra Guhathakurta, Eric W. Koch, Christina W. Lindberg, Erik Rosolowsky, Karin M. Sandstrom, Evan D. Skillman, Adam Smercina, Estephani E. TorresVillanueva
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 86 (2024)
We measure the high-mass stellar initial mass function (IMF) from resolved stars in M33 young stellar clusters. Leveraging the Hubble Space Telescope’s high resolving power, we fully model the IMF probabilistically. We first model the optical color
Externí odkaz:
https://doaj.org/article/b50d27320dc149f7a53d1e48a54825cb
Autor:
Daniel R. Weisz, Andrew E. Dolphin, Alessandro Savino, Kristen B. W. McQuinn, Max J. B. Newman, Benjamin F. Williams, Nitya Kallivayalil, Jay Anderson, Martha L. Boyer, Matteo Correnti, Marla C. Geha, Karin M. Sandstrom, Andrew A. Cole, Jack T. Warfield, Evan D. Skillman, Roger E. Cohen, Rachael Beaton, Alessandro Bressan, Alberto Bolatto, Michael Boylan-Kolchin, Alyson M. Brooks, James S. Bullock, Charlie Conroy, Michael C. Cooper, Julianne J. Dalcanton, Aaron L. Dotter, Tobias K. Fritz, Christopher T. Garling, Mario Gennaro, Karoline M. Gilbert, Leo Girardi, Benjamin D. Johnson, L. Clifton Johnson, Jason Kalirai, Evan N. Kirby, Dustin Lang, Paola Marigo, Hannah Richstein, Edward F. Schlafly, Erik J. Tollerud, Andrew Wetzel
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 2, p 47 (2024)
We present NIRCam and NIRISS modules for DOLPHOT, a widely used crowded-field stellar photometry package. We describe details of the modules including pixel masking, astrometric alignment, star finding, photometry, catalog creation, and artificial st
Externí odkaz:
https://doaj.org/article/c2942cef14c8474da98e78e9ba5f8bf7
Autor:
Christina Willecke Lindberg, Claire E. Murray, Julianne J. Dalcanton, J. E. G. Peek, Karl D. Gordon
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 1, p 58 (2024)
Resolving the environments of massive stars is crucial for understanding their formation mechanisms and their impact on galaxy evolution. An important open question is whether massive stars found in diffuse regions outside spiral arms formed in situ
Externí odkaz:
https://doaj.org/article/24afb599240744e88d300197fbe27ccd
Autor:
Danny Horta, Adrian M. Price-Whelan, David W. Hogg, Kathryn V. Johnston, Lawrence Widrow, Julianne J. Dalcanton, Melissa K. Ness, Jason A. S. Hunt
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 165 (2024)
Under the assumption of a simple and time-invariant gravitational potential, many Galactic dynamics techniques infer the milky Way’s mass and dark matter distributions from stellar kinematic observations. These methods typically rely on parameteriz
Externí odkaz:
https://doaj.org/article/fc4c1d904b3c4e8489580edf98260966
Autor:
Emily J. Griffith, David W. Hogg, Julianne J. Dalcanton, Sten Hasselquist, Bridget Ratcliffe, Melissa Ness, David H. Weinberg
Publikováno v:
The Astronomical Journal, Vol 167, Iss 3, p 98 (2024)
The element abundance pattern found in Milky Way disk stars is close to two-dimensional, dominated by production from one prompt process and one delayed process. This simplicity is remarkable, since the elements are produced by a multitude of nucleos
Externí odkaz:
https://doaj.org/article/7484b8e022b440d491632bb3e82be226
Autor:
Adam Smercina, Eric F. Bell, Paul A. Price, Jeremy Bailin, Julianne J. Dalcanton, Roelof S. de Jong, Richard D’Souza, Katya Gozman, In Sung Jang, Antonela Monachesi, David Nidever, Colin T. Slater
Publikováno v:
The Astrophysical Journal Letters, Vol 949, Iss 2, p L37 (2023)
M64, often called the “Evil Eye” galaxy, is unique among local galaxies. Beyond its dramatic, dusty nucleus, it also hosts an outer gas disk that counter-rotates relative to its stars. The mass of this outer disk is comparable to the gas content
Externí odkaz:
https://doaj.org/article/8e0f71ac8f1e4fa6a51ec4f896a056fc
Autor:
Adam Smercina, Julianne J. Dalcanton, Benjamin F. Williams, Meredith J. Durbin, Margaret Lazzarini, Eric F. Bell, Yumi Choi, Andrew Dolphin, Karoline Gilbert, Puragra Guhathakurta, Eric W. Koch, Amanda C. N. Quirk, Hans-Walter Rix, Erik Rosolowsky, Anil Seth, Evan Skillman, Daniel R. Weisz
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 3 (2023)
We present a detailed analysis of the structure of the Local Group flocculent spiral galaxy M33, as measured using the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region (PHATTER) survey. Leveraging the multiwavelength coverage of PHAT
Externí odkaz:
https://doaj.org/article/996ac5beb87c49be83b18a04c3a5bf59
Autor:
Benjamin F. Williams, Meredith Durbin, Dustin Lang, Julianne J. Dalcanton, Andrew E. Dolphin, Adam Smercina, Petia Yanchulova Merica-Jones, Daniel R. Weisz, Eric F. Bell, Karoline M. Gilbert, Léo Girardi, Karl Gordon, Puragra Guhathakurta, L. Clifton Johnson, Tod R. Lauer, Anil Seth, Evan Skillman
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 268, Iss 2, p 48 (2023)
We present the final legacy version of stellar photometry for the Panchromatic Hubble Andromeda Treasury (PHAT) survey. We have reprocessed all of the Hubble Space Telescope Wide Field Camera 3 and Advanced Camera for Surveys near-ultraviolet (F275W,
Externí odkaz:
https://doaj.org/article/27665fadf59b4635b421525bfc2ae60b
Autor:
Daniel R. Weisz, Kristen B. W. McQuinn, Alessandro Savino, Nitya Kallivayalil, Jay Anderson, Martha L. Boyer, Matteo Correnti, Marla C. Geha, Andrew E. Dolphin, Karin M. Sandstrom, Andrew A. Cole, Benjamin F. Williams, Evan D. Skillman, Roger E. Cohen, Max J. B. Newman, Rachael Beaton, Alessandro Bressan, Alberto Bolatto, Michael Boylan-Kolchin, Alyson M. Brooks, James S. Bullock, Charlie Conroy, M. C. Cooper, Julianne J. Dalcanton, Aaron L. Dotter, Tobias K. Fritz, Christopher T. Garling, Mario Gennaro, Karoline M. Gilbert, Léo Girardi, Benjamin D. Johnson, L. Clifton Johnson, Jason S. Kalirai, Evan N. Kirby, Dustin Lang, Paola Marigo, Hannah Richstein, Edward F. Schlafly, Judy Schmidt, Erik J. Tollerud, Jack T. Warfield, Andrew Wetzel
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 268, Iss 1, p 15 (2023)
We present the JWST Resolved Stellar Populations Early Release Science (ERS) program. We obtained 27.5 hr of NIRCam and NIRISS imaging of three targets in the Local Group (Milky Way globular cluster M92, ultrafaint dwarf galaxy Draco II , and star-fo
Externí odkaz:
https://doaj.org/article/748c5c85031c4e0f99d81f3deab03e3f