A star too small and cold to shine has been found by S.Kulkarni e

Home / Questions / A star too small and cold to shine has been found by S.Kulkarni etal . ( Science 270, 1478

A star too small and cold to shine has been found by S.Kulkarni etal . ( Science 270, 1478

A star too small and cold to shine has been found by S.Kulkarnietal. (Science270, 1478 (1995)). The spectrum of the object shows the presence of methane, which, according to the authors, would not exist at temperatures much above 1000 K. The mass of the star, as determined from its gravitational effect on a companion star, is roughly 20 times the mass of Jupiter. The star is considered to be a brown dwarf, the coolest ever found.

(a) From available thermodynamic data, test the stability of methane at temperatures above 1000 K.

(b) What is λmax for this star?

(d) To determine whether the star will shine, estimate the fraction of the energy density of the star in the visible region of the spectrum.

Liam Smith 07-Nov-2017

Answer (UnSolved)

question Get solution

Customers can pay their purchased tickets by cash Customers can pay their purchased tickets by cash, cheque, bank card, visa card, master cards and frequent flyer point. The payment by American express card will be charg...
To promote the better services to VIP members and award customers To promote the better services to VIP members and award customers’ loyalty, Qantas provide the airline lounge with airport locations around Australia and the world. Those...
Qantas Airways is the flag carrier airline of Australia Qantas Airways is the flag carrier airline of Australia. Qantas' headquarter is located at the Qantas Centre in the Mascot suburb of Sydney, New South Wales. The Qantas G...
All Qantas Line Maintenance Stations can communicate with inbound aircraft provides All Qantas Line Maintenance Stations can communicate with inbound aircraft provides 24 hours per day for advice on incoming defects, facilitating the preparation of appro...
Qantas management is to ensure the successful completion Qantas management is to ensure the successful completion of around 300,000 flights every year to 57 airports around Australia and to 86 destinations in 36 countries that ...
Each service and the in charge engineer Each service and the in charge engineer, the parts used, the problem fixed and service log for an aircraft will be recorded in the database. The management must make sure...
Each flight maintains an inventory table for consumable products Each flight maintains an inventory table for consumable products. The inventory will be refilled at end of each trip. The management wants to analyze the high costs of pr...
There are hundreds Qantas flights transporting passengers from different airports There are hundreds Qantas flights transporting passengers from different airports to over 50 domestic and international destinations every day. Qantas flight operational...
The class of Qantas frequent flyer membership The class of Qantas frequent flyer membership is based on flying more for higher-level class. The types of memberships are based on distance flown, with bonuses that vary...
Qantas has a centralised operational database to capture Qantas has a centralised operational database to capture their day-to-day ticket sales. Qantas provides online ticket sales and promotion agents for ticket sales. Promoti...

Service

A star too small and cold to shine has been found by S.Kulkarni etal . ( Science 270, 1478

A star too small and cold to shine has been found by S.Kulkarni etal . ( Science 270, 1478

Answer (UnSolved)

Ask Homework Question

Writing Help

Have a language expert improve your writing

Instant response from experts on your writing help queries

Find your question's answer instantly in our Q&A bank