6 papers
KDG 162: A Nearby Isolated Star-forming Dwarf Galaxy
Gagandeep S. Anand, Igor D. Karachentsev, Meredith J. Durbin +6
The nearby dwarf galaxy KDG 162 (also known as KK 153) has recently attracted attention as a potentially gas-rich, isolated, and low-mass dwarf galaxy. However, many of these chara…
KKR 18: A Late Arrival Galaxy?
R. Brent Tully, Valentina E. Karachentseva, Igor D. Karachentsev +8
KKR 18 is a dwarf irregular galaxy in the Local Void at a distance of 9.46 Mpc. It is gas rich and was experiencing vigorous star formation 20 - 100 Myr ago. Its metallicity is 4%…
The Metal Content of Resolved Galaxies
Lidia N. Makarova, Denis G. Purytin, R. Brent Tully +1
We present a homogeneous metallicity analysis of old stellar populations in Local Volume (LV) galaxies using data from the CMDs/TRGB catalog of the Extragalactic Distance Database…
The TRGB-SBF Project. IV. A Color Calibration of the TRGB in the JWST F090W+F150W Filters
Maksim I. Chazov, Dmitry I. Makarov, R. Brent Tully +7
Observations with JWST in the F090W band provide a powerful tool for determining galaxy distances based on tip of the red giant branch (TRGB) measurements. It is a great convenienc…
The TRGB-SBF Project. II. Resolving the Virgo Cluster with JWST
Gagandeep S. Anand, R. Brent Tully, Yotam Cohen +9
The Virgo Cluster is the nearest substantial cluster of galaxies to the Milky Way and a cornerstone of the extragalactic distance scale. Here, we present JWST/NIRCam observations t…
The TRGB-SBF Project. I. A Tip of the Red Giant Branch Distance to the Fornax Cluster with JWST
Gagandeep S. Anand, R. Brent Tully, Yotam Cohen +7
Differences between the local value of the Hubble constant measured via the distance ladder versus the value inferred from the cosmic microwave background with the assumption of th…