Cepheids and Long-Period Variables in NGC 4258

Details Cepheids and Long-Period Variables in NGC 4258 Cepheids and Long-Period Variables in NGC 4258

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010noao.prop..265m&link_type=abstract

NOAO Proposal ID #2010A-0265

Physics

Scientific paper

We propose to observe Cepheids and long period variables in NGC 4258. This galaxy serves as the "anchor" or first rung in the Extragalactic Distance Scale thanks to a very precise and accurate geometric distance estimate based on maser observations. We imaged NGC 4258 with Gemini from 2004 to 2007 and discovered a large number of long-period Cepheids, extending the upper period range of the previously-existing HST Period-Luminosity (P-L) relation from 45 to 150 days. In addition, we discovered numerous long-period variables (LPVs) with periods up to 900 days. These variables have the potential to be excellent distance indicators in the near-infrared, which is highly relevant for the JWST era. We request a total of 3 nights on WIYN to achieve three goals: (i) obtain more precise periods and phases for the variables, in support of ongoing HST near-IR observations; (ii) continue the search for long period Cepheids in this galaxy; (iii) tie the existing Gemini observations to the Sloan magnitude system, to obtain accurate magnitudes and colors for these important variables.

Affiliated with

Also associated with

No associations

Rating

Cepheids and Long-Period Variables in NGC 4258 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cepheids and Long-Period Variables in NGC 4258, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cepheids and Long-Period Variables in NGC 4258 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1106214